Marshmallow: How do I remount an Adoptable Storage Micro SD Card?

[actcontpr]

I have a Motorola G2 (Android 6.0, kernel 3.4.42-gef77327) with a micro SD card mounted as adoptable storage. The card is faulty (self-unmounted a couple of times), and I wanted to copy the (irreplacable holiday) pictures to another device. As I now know, this is not supposed to work by simply moving the card.

The problem: After some mucking around, the card is no longer recognized by the G2. Did I use the SD card's "forget" option? I don't think so, but it looks as if I did.

http://nelenkov.blogspot.de/2015/06/decrypting-android-m-adopted-storage.html looks promising, but it is a year old, and some things apparently have changed since then: If I insert the drive into a Linux box, it's not automounted, and gparted does not recognize it. The only option available seems to be a reformat.

So irrespective of what the website says, is there a way to read the contents of the SD card? Perhaps a way to tell the G2 to remount it as its original adoptable storage device?

Any ideas?

# cat usb-storage/5
Host scsi5: usb-storage
Vendor: Generic
Product: USB2.0-CRW
Serial Number: 20090815198100000
Protocol: Transparent SCSI
Transport: Bulk
Quirks:
# cat sg/device_strs
[...]
Generic- SD/MMC 1.00

From /var/log/syslog when the card is inserted into the Linux box:

Mar 27 19:11:19 thebox kernel: [ 8170.541304] usb-storage 1-2:1.0: USB Mass Storage device detected
Mar 27 19:11:19 thebox kernel: [ 8170.549622] scsi6 : usb-storage 1-2:1.0
Mar 27 19:11:19 thebox mtp-probe: checking bus 1, device 7: "/sys/devices/pci0000:00/0000:00:1d.7/usb1/1-2"
Mar 27 19:11:19 thebox mtp-probe: bus: 1, device: 7 was not an MTP device
Mar 27 19:11:20 thebox kernel: [ 8171.548982] scsi 6:0:0:0: Direct-Access Generic- SD/MMC 1.00 PQ: 0 ANSI: 0 CCS
Mar 27 19:11:20 thebox kernel: [ 8171.550943] sd 6:0:0:0: Attached scsi generic sg2 type 0
Mar 27 19:11:21 thebox kernel: [ 8172.289222] sd 6:0:0:0: [sdb] 124735488 512-byte logical blocks: (63.8 GB/59.4 GiB)
Mar 27 19:11:21 thebox kernel: [ 8172.290210] sd 6:0:0:0: [sdb] Write Protect is off
Mar 27 19:11:21 thebox kernel: [ 8172.290217] sd 6:0:0:0: [sdb] Mode Sense: 03 00 00 00
Mar 27 19:11:21 thebox kernel: [ 8172.291203] sd 6:0:0:0: [sdb] No Caching mode page found
Mar 27 19:11:21 thebox kernel: [ 8172.291211] sd 6:0:0:0: [sdb] Assuming drive cache: write through
Mar 27 19:11:21 thebox kernel: [ 8172.298206] sd 6:0:0:0: [sdb] No Caching mode page found
Mar 27 19:11:21 thebox kernel: [ 8172.298215] sd 6:0:0:0: [sdb] Assuming drive cache: write through
Mar 27 19:11:21 thebox kernel: [ 8172.313899] sdb: sdb1 sdb2
Mar 27 19:11:21 thebox kernel: [ 8172.320204] sd 6:0:0:0: [sdb] No Caching mode page found
Mar 27 19:11:21 thebox kernel: [ 8172.320214] sd 6:0:0:0: [sdb] Assuming drive cache: write through
Mar 27 19:11:21 thebox kernel: [ 8172.320220] sd 6:0:0:0: [sdb] Attached SCSI removable disk

 

[B. Diddy]

Moved to the Moto G (2014) forum.

EDIT: Moved back to Marshmallow forum per OP's specific request.

 

[actcontpr]

Spent 7 hours trying to mount the device via adb - no avail.

*bump*

 

[TheChosenDoge]

Sadly once you make a card "Adoptable storage" it's really hard to give it away to another computer or device and they won't even read it...only the original device so it literally acts like onboard storage (I.E taking chips out of the phone and putting in another it won't read it)

The way MM handles Adoptable storage is really stupid... There was better ways to do it

The only way is to Reformat and add as portable storage if you want to use the card but I think your data is gone :/

If you plan to use adoptable storage I'd buy a brand new SD with less chance of turning faulty and they are decently affordable

 

[actcontpr]

Thanks for your reply. Anyway *bump* - still looking for a better answer. Trying to rescue the data. :-(