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Acer Gallant Duo - Mass Storage Device

5 posts in this topic

Posted · Report post

Hi,

I looking for a solution to enable mass storage device on the ACER.

replacing:

ro.sys.usb.storage.type=mtp

with:

ro.sys.usb.storage.type=mass_storage

in /system/build.prop has no effect

neither adding :

sys.usb.config mass_storage,adb

persist.sys.usb.config mass_storage,adb

sys.usb.state mass_storage,adb

... any idea ?

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Posted · Report post

use:

persist.sys.usb.config=mass_storage,adb

wipe data/cache and reboot ;)

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Posted (edited) · Report post

use:

persist.sys.usb.config=mass_storage,adb

wipe data/cache and reboot

Thanks !

You're right ! (bad cut/paste from setprobe lines) ! That's better with an = !

persist.sys.usb.config=mass_storage,adb seem to be sufficient to activate mass storage !

It works now ! but only the 2gb portion of internal memory used for apps and storage is mounted on computer, /sdard2 (the real ext memory card) is ignored !

Another idea or reco' ! ;-)

Edited by jaarvin
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Posted (edited) · Report post

I tried different configurations according to init.usb.rc (imported at the beginning of /init.rc)

There is also usb conf in /init.factory.rc and /meta_init.rc both dealing with adb and acm (my android knowledge is very limited and i do not know the purpose of these settings)

combined (more than 2 values) configuration like one corresponding to #11: persist.sys.usb.config=mtp,mass_storage,adb do not works

I confirm also that : persist.sys.usb.config=mass_storage,adb do not allow to mount /sdcard2 (external sdcard) on computer (only internal sdcard in visible and mount.

THe strange part of the process is that /sdcard2 is unmount from the device (ACER) but not presented to the computer.

I tried to reformat the external sdcard2 without success.

any idea ?

Edited by jaarvin
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Posted (edited) · Report post

It seems there is something wrong with sysfs on the E350

According to what is explain here:

http://winterland.no...age-ums-in-ics/

A lun1 should be there :

/sys/devices/platform/mt_usb/gadget/

In advanced_meta_init.rc : /sys/class/android_usb/android0/f_mass_storage/lun is a symlink to

/sys/devices/platform/mt_usb/gadget/lun0

No place for lun1

Playing with vold init does no help

I am stuck here for now

Edited by jaarvin
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