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What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/sdcard to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add mounting of that subvolume (android) to the sdcard-mounting-script provided by jolla, to be precise, in the section where it mounts non-fat volumes I added the android volume to be mounted to /data/sdcard
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/sdcard

I did not want to write a detailed guide as I do not want to be responsible for any wrong doings all steps are pretty basic for people knowing their way around the cmdline - you can find every step somewhere here @tjc or in the man-pages of the required tools

detailed cmds use at your own risk

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/sdcard/* /media/sdcard/android
13. umount /dev/mmcblk1
14. edit /usr/sbin/mount-sd.sh add mount -o subvol=android,compress,$MOUNT_OPTS $(DEVNAME) /data/sdcard/ after the btrfs mount (btrfs mount is in line 53, add it just below in a newline)

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/sdcard to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add mounting of that subvolume (android) to the sdcard-mounting-script provided by jolla, to be precise, in the section where it mounts non-fat volumes I added the android volume to be mounted to /data/sdcard
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/sdcard

I did not want to write a detailed guide as I do not want to be responsible for any wrong doings all steps are pretty basic for people knowing their way around the cmdline - you can find every step somewhere here @tjc or in the man-pages of the required tools

detailed cmds use at your own risk

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/sdcard/* /media/sdcard/android
13. umount /dev/mmcblk1
14. edit /usr/sbin/mount-sd.sh add mount -o subvol=android,compress,$MOUNT_OPTS $(DEVNAME) /data/sdcard/ after the btrfs mount (btrfs mount is in line 53, add it just below in a newline)

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/sdcard to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add mounting of that subvolume (android) to the sdcard-mounting-script provided by jolla, to be precise, in the section where it mounts non-fat volumes I added the android volume to be mounted to /data/sdcard
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/sdcard

I did not want to write a detailed guide as I do not want to be responsible for any wrong doings all steps are pretty basic for people knowing their way around the cmdline - you can find every step somewhere here @tjc or in the man-pages of the required tools

detailed cmds use at your own risk

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/sdcard/* /media/sdcard/android
13. umount /dev/mmcblk1
14. edit /usr/sbin/mount-sd.sh add mount -o subvol=android,compress,$MOUNT_OPTS $(DEVNAME) /data/sdcard/ after the btrfs mount (btrfs mount is in line 53, add it just below in a newline)

Version: 1.0.5.19

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/sdcard to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add mounting of that subvolume (android) to the sdcard-mounting-script provided by jolla, to be precise, in the section where it mounts non-fat volumes I added the android volume to be mounted to /data/sdcard
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/sdcard

I did not want to write a detailed guide as I do not want to be responsible for any wrong doings all steps are pretty basic for people knowing their way around the cmdline - you can find every step somewhere here @tjc or in the man-pages of the required tools

detailed cmds use at your own risk

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/sdcard/* /media/sdcard/android
13. umount /dev/mmcblk1

14. edit /usr/sbin/mount-sd.sh add mount -o subvol=android,compress,$MOUNT_OPTS $(DEVNAME) /data/sdcard/ after the btrfs mount (btrfs mount is in line 53, add it just below in a newline)

    *) mount ${DEVNAME} $MNT/${UUID} -o $MOUNT_OPTS || /bin/rmdir $MNT/${UUID} mount -o subvol=android,compress,$MOUNT_OPTS $(DEVNAME) /data/sdcard/ ;;

Version: 1.0.5.19

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/sdcard to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add mounting of that subvolume (android) to the sdcard-mounting-script provided by jolla, to be precise, in the section where it mounts non-fat volumes I added the android volume to be mounted to /data/sdcard
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/sdcard

I did not want to write a detailed guide as I do not want to be responsible for any wrong doings all steps are pretty basic for people knowing their way around the cmdline - you can find every step somewhere here @tjc or in the man-pages of the required tools

detailed cmds use at your own risk

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/sdcard/* /media/sdcard/android
13. umount /dev/mmcblk1

14. edit /usr/sbin/mount-sd.sh add mount -o subvol=android,compress,$MOUNT_OPTS $(DEVNAME) /data/sdcard/ after the btrfs mount (btrfs mount is in line 53, add it just below in a newline)

lines look like this

*) 
  mount ${DEVNAME} $MNT/${UUID} -o $MOUNT_OPTS || /bin/rmdir $MNT/${UUID}
  mount -o subvol=android,compress,$MOUNT_OPTS $(DEVNAME) /data/sdcard/
  ;;
 ;;

Version: 1.0.5.19

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/sdcard to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add mounting of that subvolume (android) to the sdcard-mounting-script provided by jolla, to be precise, in the section where it mounts non-fat volumes I added the android volume to be mounted to /data/sdcard
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/sdcard

detailed cmds use at your own risk

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/sdcard/* /media/sdcard/android
13. umount /dev/mmcblk1
14. edit /usr/sbin/mount-sd.sh add mount -o subvol=android,compress,$MOUNT_OPTS $(DEVNAME) /data/sdcard/ after the btrfs mount (btrfs mount is actually not specified so we go in the line for any other case *) in line 53, add it just below in a newline)

lines look like this

*) 
  mount ${DEVNAME} $MNT/${UUID} -o $MOUNT_OPTS || /bin/rmdir $MNT/${UUID}
  mount -o subvol=android,compress,$MOUNT_OPTS $(DEVNAME) /data/sdcard/
  ;;

Version: 1.0.5.19

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/sdcard to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add mounting of that subvolume (android) to the sdcard-mounting-script provided by jolla, to be precise, in the section where it mounts non-fat volumes I added the android volume to be mounted to /data/sdcard
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/sdcard

detailed cmds use at your own risk

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/sdcard/* /media/sdcard/android
13. umount /dev/mmcblk1
14. edit /usr/sbin/mount-sd.sh add mount -o subvol=android,compress,$MOUNT_OPTS $(DEVNAME) ${DEVNAME} /data/sdcard/ after the btrfs mount (btrfs mount is actually not specified so we go in the line for any other case *) in line 53, add it just below in a newline)

lines look like this

*) 
  mount ${DEVNAME} $MNT/${UUID} -o $MOUNT_OPTS || /bin/rmdir $MNT/${UUID}
  mount -o subvol=android,compress,$MOUNT_OPTS $(DEVNAME) ${DEVNAME} /data/sdcard/
  ;;

Version: 1.0.5.191.0.7.16

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/sdcard /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add mounting of that subvolume (android) to the sdcard-mounting-script provided by jolla, to be precise, in the section where it mounts non-fat volumes I added the android volume to be mounted to /data/sdcard
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/sdcard

detailed cmds use at your own risk

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/sdcard/* /data/media/* /media/sdcard/android
13. umount /dev/mmcblk1
14. edit /usr/sbin/mount-sd.sh add mount

    create /etc/systemd/system/androidsdcard.service and fill with:

    [Unit] Description=Mount SDCard btrfs subvolume for Android ConditionPathExists=/dev/mmcblk1 ConditionPathIsDirectory=/data/media Requires=local-fs.target Before=aliendalvik.service After=local-fs.target BindsTo=mount-sd@mmcblk1.service

    [Service] Type=oneshot RemainAfterExit=yes ExecStart=/bin/mount -o subvol=android,compress,$MOUNT_OPTS ${DEVNAME} /data/sdcard/ after the btrfs mount (btrfs mount subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

    [Install] WantedBy=local-fs.target aliendalvik.service

15. systemctl enable androidsdcard.service - the service gets started everytime alien is actually not specified so started

for the future we go in the line for any other case *) in line 53, add it just below in a newline)

lines look like this

*) 
  mount ${DEVNAME} $MNT/${UUID} -o $MOUNT_OPTS || /bin/rmdir $MNT/${UUID}
  mount -o subvol=android,compress,$MOUNT_OPTS ${DEVNAME} /data/sdcard/
  ;;

Version: 1.0.7.16

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add mounting of that subvolume (android) to the sdcard-mounting-script provided by jolla, to be precise, in the section where it mounts non-fat volumes I added the android volume to be mounted to /data/sdcard
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/sdcard

detailed cmds use at your own risk

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. umount /dev/mmcblk1

14. create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target
BindsTo=mount-sd@mmcblk1.service
 
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'
 
/data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service
 
aliendalvik.service

Version: 1.0.7.16

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add mounting of a system.service to systemd that mounts and unmounts the subvolume (android) to the sdcard-mounting-script provided by jolla, for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be precise, in the section where it mounts non-fat volumes I added the android volume to be mounted to /data/sdcardlifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/sdcard/data/media

detailed cmds use at your own risk

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. umount /dev/mmcblk1
14. create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started everytime alien every time aliendalvik is startedstarted and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint

for the future we only need to load the service file to its place and enable it, if something changes I will update the code

Version: 1.0.7.16

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. umount /dev/mmcblk1

preparing the system

1. create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint

for the future we only need to load the service file to its place and enable it, if something changes I will update the code

Version: 1.0.7.16

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. umount /dev/mmcblk1

preparing the system

1. create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint

for the future we only need to load the service file to its place and enable it, if something changes I will update the code

Version: 1.0.7.16

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. umount /dev/mmcblk1

preparing the system

1. create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint

for the future we only need to load the service file to its place and enable it, if something changes I will update the code

BACKUP TO SDCARD NOTICE: For copying backups to the sdcard you need to deactivate the service systemctl stop androidsdcard.service as the-vault does not account for other usecases than sdcards get mounted for nemo to /media/sdcard/($UUID). This only applies for jolla-settings of course you can tar ~/.vault to /media/sdcard/($UUID) yourself

Version: 1.0.7.16

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. umount /dev/mmcblk1

preparing the system

1. create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint

for the future we only need to load the service file to its place and enable it, if something changes I will update the code

BACKUP TO SDCARD NOTICE: For copying backups to the sdcard you need to deactivate the service systemctl stop androidsdcard.service as the-vault does not account for other usecases than sdcards get mounted for nemo to /media/sdcard/($UUID). This only applies for jolla-settings of course you can tar ~/.vault to /media/sdcard/($UUID) yourself

Version: 1.0.7.16

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. umount /dev/mmcblk1

preparing the system

1. create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint

for the future we only need to load the service file to its place and enable it, if something changes I will update the code

For upgrading from previous version: the group and owner of the files have changed, stop aliendalvik.service and chmod media_rw:media_rw -R /data/media/

BACKUP TO SDCARD NOTICE: For copying backups to the sdcard you need to deactivate the service systemctl stop androidsdcard.service as the-vault does not account for other usecases than sdcards get mounted for nemo to /media/sdcard/($UUID). This only applies for jolla-settings of course you can tar ~/.vault to /media/sdcard/($UUID) yourself

BACKUP TO SDCARD UPDATE: I updated the service file to inlcude After=local-fs.target mount-sd@mmcblk1.service, if you alter service files you need to remember to update the tree or it wont work (stop service, disable service, update file, systemctl daemon-reload, enable service; I am sure there is an easier way but I don't know it yet)

Version: 1.0.7.16

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. umount /dev/mmcblk1

preparing the system

1. create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint

for the future we only need to load the service file to its place and enable it, if something changes I will update the code

For upgrading from previous version: the group and owner of the files have changed, stop aliendalvik.service and chmod media_rw:media_rw -R /data/media/

BACKUP TO SDCARD NOTICE: For copying backups to the sdcard you need to deactivate the service systemctl stop androidsdcard.service as the-vault does not account for other usecases than sdcards get mounted for nemo to /media/sdcard/($UUID). This only applies for jolla-settings of course you can tar ~/.vault to /media/sdcard/($UUID) yourself

BACKUP TO SDCARD UPDATE: I updated the service file to inlcude After=local-fs.target mount-sd@mmcblk1.service, if you alter service files you need to remember to update the tree or it wont work (stop service, disable service, update file, systemctl daemon-reload, enable service; I am sure there is an easier way but I don't know it yet)

Version: 1.0.7.16

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. umount /dev/mmcblk1

preparing the system

1. create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpointmountpoint (due to the-vault only looking for the biggest mounted sdcard partition we have to wait for mount-sd too to have it read by the-vault first)

for the future we only need to load the service file to its place and enable it, if something changes I will update the code

For upgrading from previous version: the group and owner of the files have changed, stop aliendalvik.service and chmod media_rw:media_rw -R /data/media/

BACKUP TO SDCARD NOTICE: For copying backups to the sdcard you need to deactivate the service systemctl stop androidsdcard.service as the-vault does not account for other usecases than sdcards get mounted for nemo to /media/sdcard/($UUID). This only applies for jolla-settings of course you can tar ~/.vault to /media/sdcard/($UUID) yourself

BACKUP TO SDCARD UPDATE: I updated the service file to inlcude After=local-fs.target mount-sd@mmcblk1.service, if you alter service files you need to remember to update the tree or it wont work (stop service, disable service, update file, systemctl daemon-reload, enable service; I am sure there is an easier way but I don't know it yet)

Version: 1.0.7.16

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. umount /dev/mmcblk1

preparing the system

1. create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint (due to the-vault only looking for the biggest mounted sdcard partition we have to wait for mount-sd too to have it read by the-vault first)

for the future we only need to load the service file to its place and enable it, if something changes I will update the code

For upgrading from previous version: the group and owner of the files have changed, stop aliendalvik.service and chmod chown media_rw:media_rw -R /data/media/

BACKUP TO SDCARD NOTICE: For copying backups to the sdcard you need to deactivate the service systemctl stop androidsdcard.service as the-vault does not account for other usecases than sdcards get mounted for nemo to /media/sdcard/($UUID). This only applies for jolla-settings of course you can tar ~/.vault to /media/sdcard/($UUID) yourself

BACKUP TO SDCARD UPDATE: I updated the service file to inlcude After=local-fs.target mount-sd@mmcblk1.service, if you alter service files you need to remember to update the tree or it wont work (stop service, disable service, update file, systemctl daemon-reload, enable service; I am sure there is an easier way but I don't know it yet)

Version: 1.0.7.16>=1.0.7.16

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. umount /dev/mmcblk1

preparing the system

1. create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint (due to the-vault only looking for the biggest mounted sdcard partition we have to wait for mount-sd too to have it read by the-vault first)

for the future we only need to load the service file to its place and enable it, if something changes I will update the code

For upgrading from previous version: the group and owner of the files have changed, stop aliendalvik.service and chown media_rw:media_rw -R /data/media/

BACKUP TO SDCARD NOTICE: For copying backups to the sdcard you need to deactivate the service systemctl stop androidsdcard.service as the-vault does not account for other usecases than sdcards get mounted for nemo to /media/sdcard/($UUID). This only applies for jolla-settings of course you can tar ~/.vault to /media/sdcard/($UUID) yourself

BACKUP TO SDCARD UPDATE: I updated the service file to inlcude After=local-fs.target mount-sd@mmcblk1.service, if you alter service files you need to remember to update the tree or it wont work (stop service, disable service, update file, systemctl daemon-reload, enable service; I am sure there is an easier way but I don't know it yet)

Version: >=1.0.7.16

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint (due to the-vault only looking for the biggest mounted sdcard partition we have to wait for mount-sd too to have it read by the-vault first)

for the future we only need to load the service file to its place and enable it, if something changes I will update the code

For upgrading from previous version: the group and owner of the files have changed, stop aliendalvik.service and chown media_rw:media_rw -R /data/media/

BACKUP TO SDCARD NOTICE: For copying backups to the sdcard you need to deactivate the service systemctl stop androidsdcard.service as the-vault does not account for other usecases than sdcards get mounted for nemo to /media/sdcard/($UUID). This only applies for jolla-settings of course you can tar ~/.vault to /media/sdcard/($UUID) yourself

BACKUP TO SDCARD UPDATE: I updated the service file to inlcude After=local-fs.target mount-sd@mmcblk1.service, if you alter service files you need to remember to update the tree or it wont work (stop service, disable service, update file, systemctl daemon-reload, enable service; I am sure there is an easier way but I don't know it yet)

Version: >=1.0.7.16=1.1.0.39

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

• create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint (due to the-vault only looking for the biggest mounted sdcard partition we have to wait for mount-sd too to have it read by the-vault first)

for the future we only need to load the service file to its place and enable it, if something changes I will update the codecode, update9 went through without anything as the updates do not touch androidsdcard.service as of yet

Version: =1.1.0.39

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the cardcard might be another /dev or even more than one
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

• create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint (due to the-vault only looking for the biggest mounted sdcard partition we have to wait for mount-sd too to have it read by the-vault first)

for the future we only need to load the service file to its place and enable it, if something changes I will update the code, update9 went through without anything as the updates do not touch androidsdcard.service as of yet

Version: =1.1.0.391.1.1.27

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card might be another /dev or even more than one
2. mkfs.btrfs -f /dev/mmcblk1 - format the card (no need for partition)
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

• create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint (due to the-vault only looking for the biggest mounted sdcard partition we have to wait for mount-sd too to have it read by the-vault first)

for the future we only need to load the service file to its place and enable it, if something changes I will update the code, update9 went through without anything as the updates do not touch androidsdcard.service as of yet

Version: 1.1.1.27

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card might be another /dev or even more than one
2. mkfs.btrfs -f /dev/mmcblk1 mkfs.btrfs -O ^extref -f /dev/mmcblk1 - format the card (no need for partition)partition) - for now extref (this extends num of hardlinks available) needs to be disabled, even on the device
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

• create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint (due to the-vault only looking for the biggest mounted sdcard partition we have to wait for mount-sd too to have it read by the-vault first)

for the future we only need to load the service file to its place and enable it, if something changes I will update the code, update9 went through without anything as the updates do not touch androidsdcard.service as of yet

Version: 1.1.1.27

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card might be another /dev or even more than one
2. mkfs.btrfs -f /dev/mmcblk1 mkfs.btrfs -O ^extref -f /dev/mmcblk1 - format the card (no need for partition) - for now extref (this extends num of hardlinks available) needs to be disabled, even on the device
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

• create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint (due to the-vault only looking for the biggest mounted sdcard partition we have to wait for mount-sd too to have it read by the-vault first)

for the future we only need to load the service file to its place and enable it, if something changes I will update the code, update9 went through without anything as the updates do not touch androidsdcard.service as of yet

Version: 1.1.1.27

broken in >1.1.2, I will update as soon as I find out how to mount again - for now you need to stop aliendalvik.service & .path .path, stop androidsdcard.service or .mount and make sure that it is defused then start androidsdcard.service or .mountdefused

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service then follow this list

1. umount /dev/mmcblk1p1 - unmount the card might be another /dev or even more than one
2. mkfs.btrfs -f /dev/mmcblk1 mkfs.btrfs -O ^extref -f /dev/mmcblk1 - format the card (no need for partition) - for now extref (this extends num of hardlinks available) needs to be disabled, even on the device
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

• create /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint (due to the-vault only looking for the biggest mounted sdcard partition we have to wait for mount-sd too to have it read by the-vault first)

for the future we only need to load the service file to its place and enable it, if something changes I will update the code, update9 went through without anything as the updates do not touch androidsdcard.service as of yet

Version: 1.1.1.27

This is no beginners guide, you need to know your way around! I try to make everything as foolproof as possible. This version does only apply to the SFOS release with the same version number!There are no warranties and for > 1.1.2 you need to alter dalvik files or follow the guide below how to circumvent it.

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything form from /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.servicealiendalvik.service & systemctl stop aliendalvik.path then follow this list

1. umount /dev/mmcblk1p1 - unmount the card might be another /dev or even more than one
2. mkfs.btrfs -f /dev/mmcblk1 mkfs.btrfs -O ^extref -f /dev/mmcblk1 - format the card (no need for partition) - for now extref (this extends num of hardlinks available) needs to be disabled, even on the device
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

• create (as in do create not a command) /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint (due to the-vault only looking for the biggest mounted sdcard partition we have to wait for mount-sd too to have it read by the-vault first)

for the future we only need to load the service file to its place and enable it, if something changes I will update the code, update9 went through without anything as the updates do not touch androidsdcard.service as of yet

Version: 1.1.1.27

This is no beginners guide, you need to know your way around! There are no warranties and for > 1.1.2 you need to alter dalvik files or follow the guide below how to circumvent it.

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything from /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service & systemctl stop aliendalvik.path then follow this list

1. umount /dev/mmcblk1p1 - unmount the card might be another /dev or even more than one
2. mkfs.btrfs -f /dev/mmcblk1 mkfs.btrfs -O ^extref -f /dev/mmcblk1 - format the card (no need for partition) - for now extref (this extends num of hardlinks available) needs to be disabled, even on the device
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

• create (as in do create not a command) /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint (due to the-vault only looking for the biggest mounted sdcard partition we have to wait for mount-sd too to have it read by the-vault first)

for the future we only need to load the service file to its place and enable it, if something changes I will update the code, update9 went through without anything as the updates do not touch androidsdcard.service as of yet

Version 1.1.2.x

do everything just like for 1.1.1.27 and additionally move data form the bind section (line19) of alien.sh /opt/alien/system/script/alien.sh to its rbind section (line26) so it survives a reboot too.

for d in bin sbin lib usr var etc tmp home vendor data; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

for d in dev sys run; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

for d in bin sbin lib usr var etc tmp home vendor; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

for d in dev sys run data; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

Version: 1.1.1.27

This is no beginners guide, you need to know your way around! There are no warranties and for > 1.1.2 you need to alter dalvik files or follow the guide below how to circumvent it.

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything from /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service & systemctl stop aliendalvik.path then follow this list

1. umount /dev/mmcblk1p1 - unmount the card might be another /dev or even more than one
2. mkfs.btrfs -f /dev/mmcblk1 mkfs.btrfs -O ^extref -f /dev/mmcblk1 - format the card (no need for partition) - for now extref (this extends num of hardlinks available) needs to be disabled, even on the device
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

• create (as in do create not a command) /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint (due to the-vault only looking for the biggest mounted sdcard partition we have to wait for mount-sd too to have it read by the-vault first)

for the future we only need to load the service file to its place and enable it, if something changes I will update the code, update9 went through without anything as the updates do not touch androidsdcard.service as of yet

Version 1.1.2.x

do everything just like for 1.1.1.27 and additionally move data form the bind section (line19) of /opt/alien/system/script/alien.sh to its rbind section (line26) so it survives a reboot too. As always, you probably want to save the original file to alien.sh.bak before you start messing around!

move the value [data] from section

for d in bin sbin lib usr var etc tmp home vendor data; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

to

for d in dev sys run; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

result looks like

for d in bin sbin lib usr var etc tmp home vendor; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

for d in dev sys run data; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

for d in bin sbin lib usr var etc tmp home vendor data; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

for d in dev sys run media; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

for d in bin sbin lib usr var etc tmp home vendor; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

for d in dev sys run media data; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

Version: 1.1.1.27

This is no beginners guide, you need to know your way around! There are no warranties and for > 1.1.2 you need to alter dalvik files or follow the guide below how to circumvent it.

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything from /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service & systemctl stop aliendalvik.path then follow this list

1. umount /dev/mmcblk1p1 - unmount the card might be another /dev or even more than one
2. mkfs.btrfs -f /dev/mmcblk1 mkfs.btrfs -O ^extref -f /dev/mmcblk1 - format the card (no need for partition) - for now extref (this extends num of hardlinks available) needs to be disabled, even on the device
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

• create (as in do create not a command) /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint (due to the-vault only looking for the biggest mounted sdcard partition we have to wait for mount-sd too to have it read by the-vault first)

for the future we only need to load the service file to its place and enable it, if something changes I will update the code, update9 went through without anything as the updates do not touch androidsdcard.service as of yet

Version 1.1.2.x

do everything just like for 1.1.1.27 and additionally move data form the bind section (line19) of /opt/alien/system/script/alien.sh to its rbind section (line26) so it survives a reboot too. As always, you probably want to save the original file to alien.sh.bak before you start messing around!

move the value [data] from section

for d in bin sbin lib usr var etc tmp home vendor data; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

to

for d in dev sys run; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

result looks like

for d in bin sbin lib usr var etc tmp home vendor; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

for d in dev sys run data; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

Version 1.1.4.x

please be aware that copying backup to uSD will stop working while aliendalvik is running and therefor the mount is active (you have to stop all of it to be able to restore from or save to uSD - TheVault has mismanagement, also MTP stopped working for me while the mount is active! do everything just like for 1.1.1.27 and additionally move data form the bind section (line19) of /opt/alien/system/script/alien.sh to its rbind section (line26) so it survives a reboot too. As always, you probably want to save the original file to alien.sh.bak before you start messing around!

move the value [data] from section

for d in bin sbin lib usr var etc tmp home vendor data; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

to

for d in dev sys run media; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

result looks like

for d in bin sbin lib usr var etc tmp home vendor; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

for d in dev sys run media data; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

UPDATE: As of 1.1.4 copy/recover backup (vault) from uSD stopped working with as it cannot handle having it bind-mount+not being the only subvolume available.

MTP stopped working completely, tested Debian & Win7.

Also a problem of proper handling of multi partition/volume uSD cards as is, stopping dalvik & unmounting the android subvolume makes it work though!.

If you are OK with that go ahead reading this guide.

Version: 1.1.1.27

This is no beginners guide, you need to know your way around! There are no warranties and for > 1.1.2 you need to alter dalvik files or follow the guide below how to circumvent it.

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything from /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service & systemctl stop aliendalvik.path then follow this list

1. umount /dev/mmcblk1p1 - unmount the card might be another /dev or even more than one
2. mkfs.btrfs -f /dev/mmcblk1 mkfs.btrfs -O ^extref -f /dev/mmcblk1 - format the card (no need for partition) - for now extref (this extends num of hardlinks available) needs to be disabled, even on the device
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

• create (as in do create not a command) /etc/systemd/system/androidsdcard.service and fill with:

#

[Unit]
Description=Mount SDCard btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'

[Install]
WantedBy=local-fs.target aliendalvik.service

• systemctl enable androidsdcard.service - the service file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint (due to the-vault only looking for the biggest mounted sdcard partition we have to wait for mount-sd too to have it read by the-vault first)

for the future we only need to load the service file to its place and enable it, if something changes I will update the code, update9 went through without anything as the updates do not touch androidsdcard.service as of yet

Version 1.1.2.x

do everything just like for 1.1.1.27 and additionally move data form the bind section (line19) of /opt/alien/system/script/alien.sh to its rbind section (line26) so it survives a reboot too. As always, you probably want to save the original file to alien.sh.bak before you start messing around!

move the value [data] from section

for d in bin sbin lib usr var etc tmp home vendor data; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

to

for d in dev sys run; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

result looks like

for d in bin sbin lib usr var etc tmp home vendor; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

for d in dev sys run data; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

Version 1.1.4.x>1.1.4.x

please be aware that copying backup to uSD will stop working while aliendalvik is running and therefor the mount is active (you have to stop all of it to be able to restore from or save to uSD - TheVault has mismanagement, also MTP stopped working for me while the mount is active! do everything just like for 1.1.1.27 and additionally move data form the bind section (line19) of /opt/alien/system/script/alien.sh to its rbind section (line26) so it survives a reboot too. As always, you probably want to save the original file to alien.sh.bak before you start messing around!

move the value [data] from section

for d in bin sbin lib usr var etc tmp home vendor data; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

to

for d in dev sys run media; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

result looks like

for d in bin sbin lib usr var etc tmp home vendor; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

for d in dev sys run media data; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

UPDATE:Update: Changed from service to mount. For upgrades it is probably better to disable this hack first and enable it after the upgrade went through (everything was running fine but sailfish-utilities failed stopping android-support, guess I should upgrade to latest release before I role back after a factory-reset, just to give you a heads up - no need to do anything fancy, after upgrading I disabled and then re-enabled the mount and everything is fine again). I also changed the how-to to reflect newest available only, if you need old stuff look into the question's history.

As of 1.1.4 copy/recover backup (vault) from uSD stopped working with as it cannot handle having it bind-mount+not being the only subvolume available.

MTP stopped working completely, tested Debian & Win7.

Also a problem of proper handling of multi partition/volume uSD cards as is, stopping dalvik & unmounting the android subvolume makes it work though!.

If you are OK with that go ahead reading this guide.

Version: 1.1.1.27>1.1.4.x

This is no beginners guide, you need to know your way around! There are no warranties and for > 1.1.21.1.4 you need to alter dalvik files or follow the guide below how to circumvent it. Old stuff in question's history

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything from /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service & systemctl stop aliendalvik.path then follow this list

1. umount /dev/mmcblk1p1 - unmount the card might be another /dev or even more than one
2. mkfs.btrfs -f /dev/mmcblk1 mkfs.btrfs -O ^extref -f /dev/mmcblk1 - format the card (no need for partition) - for now extref (this extends num of hardlinks available) needs to be disabled, even on the device
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

• create (as in do create not a command) /etc/systemd/system/androidsdcard.service/etc/systemd/system/data-media.mount and fill with:

#

[Unit]
Description=Mount SDCard Description=SD card btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathExists=!/tmp/os-update-running
ConditionPathIsDirectory=/data/media
Requires=local-fs.target
Requires=local-fs.target systemd-user-session.service
Before=aliendalvik.service
After=local-fs.target mount-sd@mmcblk1.service
After=mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/mount -o subvol=android,compress,dirsync,noatime,users /dev/mmcblk1 /data/media
ExecStop=/bin/sh/ -c 'systemctl stop aliendalvik.service;umount /data/media'
[Mount]
What=/dev/mmcblk1
Where=/data/media
Options=subvol=android,compress,dirsync,noatime,users

[Install]
WantedBy=local-fs.target aliendalvik.service

Update: Changed from service to mount. For upgrades it is probably better to disable this hack first and enable it after the upgrade went through (everything was running fine but sailfish-utilities failed stopping android-support, guess I should upgrade to latest release before I role back after a factory-reset, just to give you a heads up - no need to do anything fancy, after upgrading I disabled and then re-enabled the mount and everything is fine again). I also changed the how-to to reflect newest available only, if you need old stuff look into the question's history.

As of 1.1.4 copy/recover backup (vault) from uSD stopped working with as it cannot handle having it bind-mount+not being the only subvolume available.

If you are OK with that go ahead reading this guide.

Version: >1.1.4.x

This is no beginners guide, you need to know your way around! There are no warranties and for > 1.1.4 you need to alter dalvik files or follow the guide below how to circumvent it. Old stuff in question's history

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything from /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service & systemctl stop aliendalvik.path then follow this list

1. umount /dev/mmcblk1p1 - unmount the card might be another /dev or even more than one
2. mkfs.btrfs -f /dev/mmcblk1 mkfs.btrfs -O ^extref -f /dev/mmcblk1 - format the card (no need for partition) - for now extref (this extends num of hardlinks available) needs to be disabled, even on the device
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

• create (as in do create not a command) /etc/systemd/system/data-media.mount and fill with:

#

[Unit]
Description=SD card btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathExists=!/tmp/os-update-running
ConditionPathIsDirectory=/data/media
Requires=local-fs.target systemd-user-session.service
systemd-user-sessions.service
Before=aliendalvik.service
After=mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Mount]
What=/dev/mmcblk1
Where=/data/media
Options=subvol=android,compress,dirsync,noatime,users

[Install]
WantedBy=local-fs.target aliendalvik.service

Second, create /etc/systemd/system/aliendalvik.service.d/sdcard.conf file:

[Unit] 
PartOf=data-media.mount

Then run systemctl enable data-media.mount.

• the mount file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint

for the future we only need to load the service file to its place and enable it, if something changes I will update the code, upgrade went through without anything (see first line for updates) as the updates do not touch data-media.mount as of yet

Steps since Version 1.1.4.x (just looks different in 1.1.2.x): move data form the bind section (line19) of /opt/alien/system/script/alien.sh to its rbind section (line26) so it survives a reboot too. As always, you probably want to save the original file to alien.sh.bak before you start messing around!

move the value [data] from section

for d in bin sbin lib usr var etc tmp home vendor data; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

to

for d in dev sys run media; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

result looks like

for d in bin sbin lib usr var etc tmp home vendor; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

for d in dev sys run media data; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

Update: Changed from service to mount. For upgrades upgrades it is probably better to disable this hack first and enable it after the upgrade went through (everything was running fine but sailfish-utilities failed stopping android-support, guess I should upgrade to latest release before I role back after a factory-reset, just to give you a heads up - no need to do anything fancy, after upgrading I disabled and then re-enabled the mount and everything is fine again). I also changed the how-to to reflect newest available only, if you need old stuff look into the question's history.

As of 1.1.4 >1.1.4 copy/recover backup (vault) from uSD stopped working with as it cannot handle having it bind-mount+not being the only subvolume available.

If you are OK with that go ahead reading this guide.

Version: >1.1.4.x

This is no beginners guide, you need to know your way around! There are no warranties and for > 1.1.4 you need to alter dalvik files or follow the guide below how to circumvent it. Old stuff in question's history

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything from /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service & systemctl stop aliendalvik.path then follow this list

1. umount /dev/mmcblk1p1 - unmount the card might be another /dev or even more than one
2. mkfs.btrfs -f /dev/mmcblk1 mkfs.btrfs -O ^extref -f /dev/mmcblk1 - format the card (no need for partition) - for now extref (this extends num of hardlinks available) needs to be disabled, even on the device
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

• create (as in do create not a command) /etc/systemd/system/data-media.mount and fill with:

#

[Unit]
Description=SD card btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathExists=!/tmp/os-update-running
ConditionPathIsDirectory=/data/media
Requires=local-fs.target systemd-user-sessions.service
Before=aliendalvik.service
After=mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Mount]
What=/dev/mmcblk1
Where=/data/media
Options=subvol=android,compress,dirsync,noatime,users

[Install]
WantedBy=local-fs.target aliendalvik.service

Second, create /etc/systemd/system/aliendalvik.service.d/sdcard.conf file:

[Unit] 
PartOf=data-media.mount

Then run systemctl enable data-media.mount.

• the mount file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint

for the future we only need to load the service file to its place and enable it, if something changes I will update the code, upgrade went through without anything (see first line for updates) as the updates do not touch data-media.mount as of yet

Steps since Version 1.1.4.x (just looks different in 1.1.2.x): move data form the bind section (line19) of /opt/alien/system/script/alien.sh to its rbind section (line26) so it survives a reboot too. As always, you probably want to save the original file to alien.sh.bak before you start messing around!

move the value [data] from section

for d in bin sbin lib usr var etc tmp home vendor data; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

to

for d in dev sys run media; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

result looks like

for d in bin sbin lib usr var etc tmp home vendor; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

for d in dev sys run media data; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

Update: changes of chrooting in 1.1.7 makes altering alien scripts obsolete, do not alter any files after upgrade, just re-enable the .mount and you should be good to go

Changed from service to mount. For upgrades it is probably better to disable this hack first and enable it after the upgrade went through (everything was running fine but sailfish-utilities failed stopping android-support, guess I should upgrade to latest release before I role back after a factory-reset, just to give you a heads up - no need to do anything fancy, after upgrading I disabled and then re-enabled the mount and everything is fine again). I also changed the how-to to reflect newest available only, if you need old stuff look into the question's history.

As of >1.1.4 copy/recover backup (vault) from uSD stopped working with as it cannot handle having it bind-mount+not being the only subvolume available.

If you are OK with that go ahead reading this guide.

Version: >1.1.4.x

This is no beginners guide, you need to know your way around! There are no warranties and for > 1.1.4 you need to alter dalvik files or follow the guide below how to circumvent it. Old stuff in question's history

Understand what to do before you do!

What I did to share the space of my uSD between nemo and android without getting duplicates with bind-mounts or any other hickup, read carefully and use at your own risk:

1. format the whole usdcard (mmcblk1 not mmcblk1p1) to btrfs
2. mount that volume (=0)
3. create two subvolumes > jolla and android
4. set the default volume to jolla (the default is what gets mounted when something calls mount /dev/mmcblk1)
5. stop alien-dalvik and copy everything from /data/media to the new subvolume android (don't move the files, this way you have all basics alien-dalvik needs even after pulling the uSD)
6. add a system.service to systemd that mounts and unmounts the subvolume for android as needed and honours aliendalvik.service The problems to solve are: aliendalvik fuse-mounts its /data/media to /home/nemo/android_storage so you need to make sure everything is mounted before that happens on boot, and stop aliendalvik when the sd gets pulled or the mount needs to be lifted for any other cause.
7. reboot and wait for the device to settle, as soon as your jolla volume is mounted in /media/, you should see /dev/mmcblk1 being mounted to both /media/sdcard/#UUID and /data/media

detailed cmds use at your own risk

preparing the sdcard, should only be needed once!

first dosystemctl stop aliendalvik.service & systemctl stop aliendalvik.path then follow this list

1. umount /dev/mmcblk1p1 - unmount the card might be another /dev or even more than one
2. mkfs.btrfs -f /dev/mmcblk1 mkfs.btrfs -O ^extref -f /dev/mmcblk1 - format the card (no need for partition) - for now extref (this extends num of hardlinks available) needs to be disabled, even on the device
3. mount -o subvolid=0 /dev/mmcblk1 /media/sdcard
4. cd /media/sdcard
5. btrfs subvolume create jolla - create folder called jolla
6. btrfs subvolume create android - create folder called android
7. btrfs subvolume list . - returns an ID for each subvolume
8. btrfs subvolume set-default *ID for jolla* /media/sdcard/ - sets jolla to be mounted as default
9. chown nemo:nemo jolla/ - add -R if needed
10. chmod 775 jolla/
11. chmod 777 android/
12. cp -r -a -v /data/media/* /media/sdcard/android
13. cd ..
14. umount /dev/mmcblk1

preparing the system

• create (as in do create not a command) /etc/systemd/system/data-media.mount and fill with:

#

[Unit]
Description=SD card btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathExists=!/tmp/os-update-running
ConditionPathIsDirectory=/data/media
Requires=local-fs.target systemd-user-sessions.service
Before=aliendalvik.service
After=mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Mount]
What=/dev/mmcblk1
Where=/data/media
Options=subvol=android,compress,dirsync,noatime,users

[Install]
WantedBy=local-fs.target aliendalvik.service

Second, create /etc/systemd/system/aliendalvik.service.d/sdcard.conf file:

[Unit] 
PartOf=data-media.mount

Then run systemctl enable data-media.mount.

• the mount file gets started every time aliendalvik is started and stops aliendalvik when it gets stopped, on boot it prevents aliendalvik from starting if it is not started yet but waits for the local-fs to be settled and actually having a mountpoint

for the future we only need to load the service file to its place and enable it, if something changes I will update the code, upgrade went through without anything (see first line for updates) as the updates do not touch data-media.mount as of yet

Steps since Version 1.1.4.x (just looks different in 1.1.2.x): move data form the bind section (line19) of /opt/alien/system/script/alien.sh to its rbind section (line26) so it survives a reboot too. As always, you probably want to save the original file to alien.sh.bak before you start messing around!

move the value [data] from section

for d in bin sbin lib usr var etc tmp home vendor data; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

to

for d in dev sys run media; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

result looks like

for d in bin sbin lib usr var etc tmp home vendor; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

for d in dev sys run media data; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

Update: no changes needed for upgrading to 1.1.9.x, even the-vault seems to work fine now, not tested MTP as of chrooting yet. Old stuff in 1.1.7 makes altering alien scripts obsolete, do not alter any files after upgrade, just re-enable the .mount and you should be good to go

[Unit]
Description=SD card btrfs subvolume for Android
ConditionPathExists=/dev/mmcblk1
ConditionPathExists=!/tmp/os-update-running
ConditionPathIsDirectory=/data/media
Requires=local-fs.target systemd-user-sessions.service
Before=aliendalvik.service
After=mount-sd@mmcblk1.service
BindsTo=mount-sd@mmcblk1.service

[Mount]
What=/dev/mmcblk1
Where=/data/media
Options=subvol=android,compress,dirsync,noatime,users

[Install]
WantedBy=local-fs.target aliendalvik.service

[Unit] 
PartOf=data-media.mount

for d in bin sbin lib usr var etc tmp home vendor data; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

for d in dev sys run media; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done

for d in bin sbin lib usr var etc tmp home vendor; do
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --bind /$d $ROOT/$d
fi
done

for d in dev sys run media data; do 
if [ "" == "$(grep $ROOT/$d /proc/mounts)" ]; then
    echo "mount $ROOT/$d"
    mount --rbind /$d $ROOT/$d
fi
done