asked 2014-10-08 17:42:49 +0200
First: I'm not talking about exporting internal filesystems by usb storage mode. MTP is fine for that.
But I'd love to export .iso-Files and usb-filesystem images via usb storage mode. It'd be nice to be able to have a copy of sysrescuecd at hand without carrying around another usb key or cdrom/dvd.
AFAIK it seems that the required kernel modules aren't provided (anymore?).
answered 2014-10-08 18:12:16 +0200
Yoiu can easily do that yourself. See the usb-moded documentation https://github.com/nemomobile/usb-moded/blob/master/docs/usb_moded-doc.txt. All the bits and pieces are there. Jolla uses the android gadget, so look at the config files with android in the name to get an idea of how to do things. Feel free to ask more questions, I'll try to answer them as good as I can.
Also check the answer here to have a better idea of what is possible for example: https://together.jolla.com/question/10002/alternative-to-mtp-usb-mass-storage/
@dsilveira: If you would do it like that, it is best to use a symlink in the usb-moded configuration (when installed) and then change what it points to. Otherwise it will require reboots/usb-moded restarts
Philippe De Swert ( 2014-10-08 20:33:15 +0200 )editanswered 2014-12-01 03:54:05 +0200
I've been playing around a little with the idea and also found ISOdrive in warehouse which gets me near the results.
Unfortunately, the included f_mass_storage emulation is too old and does not support setting /sys/class/android_usb/android0/f_mass_storage/lun/cdrom to 1.
Can the kernel be updated to include that feature? :)
Background: Without that sysfs node, we will export the .iso as a removable usb stick, not actually a cdrom drive. This works with some, but not with all .iso files. (hybrid mode only)
Asked: 2014-10-08 17:42:49 +0200
Seen: 593 times
Last updated: Dec 01 '14
I like the sysrescuecd idea. Noted. :-)
dthierbach ( 2014-10-08 18:30:59 +0200 )editThis is a good idea, for instance to view photos or videos on a TV with USB input, by exporting a specific subpart of the file structure as RO usb mass storage. Very nice, thanks and thanks @Philippe De Swert for the solution ! I'll look at it.
Damien Caliste ( 2014-10-09 13:10:17 +0200 )edit