We have moved to a new Sailfish OS Forum. Please start new discussions there.

backup of /dev/mmcblk0p28

asked 2014-09-13 19:09:44 +0300

phantomr6 gravatar image

Can anyone make dd backup of /dev/mmcblk0p28 of factory resetted device to help me unbrick my Jolla partition?

edit retag flag offensive close delete


But wasn't recovery menu ment to help out on situations like this? Though i'd like to now how this dd backup works, i'm fed up to always start anew after factory reset. Sorry, for no help.

veeall ( 2014-09-14 00:30:31 +0300 )edit

@veeall For me it seems that recovery mode (respectively the factory reset) only resets the settings and the /home directory, but does not "reinstall" the hole OS. So if you did some changes in the deeper system, they will probably not get cleaned by an factory reset.
I would also be interested in such an copy :)

breiti_oi ( 2014-09-18 22:21:55 +0300 )edit

No backup yet!(

phantomr6 ( 2014-09-19 10:05:45 +0300 )edit

well, maybe i could make you a copy, but as i said, it wouldn't be a "fresh install". for example i activated the low power mode on my jolla, and after the factory reset it's still activated. so it seems only to reset home. what you probably need is a backup of an factory new device.

breiti_oi ( 2014-09-19 22:33:34 +0300 )edit

please make me a copy of your partition! low power mode will not prevent. You will get backup size 14,1gb, you will need to mount network folder in Jolla and to do a backup! Sorry for my english(

phantomr6 ( 2014-09-21 09:16:57 +0300 )edit

3 Answers

Sort by » oldest newest most voted

answered 2014-09-23 21:27:16 +0300

Sailor gravatar image

updated 2014-09-23 21:29:55 +0300

I post this as answer just to warn people copying their /dev/mmcblk0p28 and sending it to other people!

It contains sensitive user data

For example Wifi Passwords and /home/nemo!

[root@Jolla nemo]# btrfs subvolume list /
ID 257 gen 86423 top level 5 path @
ID 258 gen 86420 top level 5 path @home
ID 263 gen 33 top level 5 path factory-@
ID 264 gen 34 top level 5 path factory-@home
[root@Jolla nemo]#
edit flag offensive delete publish link more

answered 2014-09-23 15:26:06 +0300

darvari gravatar image

In order to increase visibility of my comment above ... now as 'answer'

a backup of that partition is easily made with i.e.:

> devel-su
> dd if=/dev/mmcblk0p28 | ssh username@pccomputer "dd of=somefile.bin"

@phantomr6 - I have a copy of my mmcblk0p28-partition (but not after factoryreset) on a webspace, I'm still looking for a way to send you a private message for the link - any ideas anybody?

edit flag offensive delete publish link more


my email is fit? "lukaschev.iv@gmail.com"

phantomr6 ( 2014-09-23 15:31:58 +0300 )edit

sorry but your file size is 36b. Is it right?

phantomr6 ( 2014-09-23 17:04:00 +0300 )edit

i corrected it, it was symbolic link

darvari ( 2014-09-23 18:05:21 +0300 )edit

You, know that this partition includes sensitive user data?

Sailor ( 2014-09-23 18:41:45 +0300 )edit

I didn't know, so I unshared the file for now, logs indicate, it hasn't been downloaded yet. Will mount the file on my linux machine and inspect it tomorrow. Any hint's where to delete what? Does it contain /home/nemo ? Thank you.

darvari ( 2014-09-23 20:49:28 +0300 )edit

answered 2014-09-26 09:54:48 +0300

phantomr6 gravatar image

I restored my phone! Thanks Emil and codrus, Sailor. I was helped by a partition image mmcblk0p28 Thanks guys!

edit flag offensive delete publish link more


i got the same problem, my phone sticks in the bootloop i think, and the recovery mode coulnt fix it. Could you send me the image too, please.

SalatgurkenJoe ( 2014-12-30 16:13:37 +0300 )edit

your mail please!

phantomr6 ( 2015-01-01 18:21:10 +0300 )edit



SalatgurkenJoe ( 2015-01-01 19:29:29 +0300 )edit

can i please have the image too? thanks in advance. fab3ryayo@gmail.com

fab3ryayo ( 2016-03-03 00:42:59 +0300 )edit

I would like to have the image as well. No matter what I tried it usually finishes with segfault. Thank you very much. ota.svitek@gmail.com

spinfoam ( 2016-03-27 00:33:51 +0300 )edit
Login/Signup to Answer

Question tools



Asked: 2014-09-13 19:09:44 +0300

Seen: 1,261 times

Last updated: Sep 26 '14