[ubuntu-uk] External USB with LUKS file system not recognized

[Andrés Muñiz Piniella]

On 14/08/16 08:37, a75576 at alumni.tecnun.es wrote:
> Dear ubuntu-uk,
>
> Hopefully I document this right:
>
> # What I expected:
>
> I have this USB drive with an encrypted partition. I have been using 
> it flawlessly for more than a year. With my Ubuntu computer I believe 
> at some point gnome-keyring saved the password and unlocks it 
> automatically. So we where able to view the files with no problem (two 
> separate users). I was able to do the same with a separate computer 
> with an ubuntu derivative. It was "a done once forgot how I did it" 
> scenario following these instructions: [1]
>
> I am on ubuntu 14.01
>
> # The problem:
>
> The other day I tried the same but it does not recognize the drive. 
> $dmesg give me the following:
>
> [  934.249457] usb 4-1: new SuperSpeed USB device number 2 using xhci_hcd
> [  934.318634] usb 4-1: New USB device found, idVendor=059b, 
> idProduct=0070
> [  934.318640] usb 4-1: New USB device strings: Mfr=1, Product=2, 
> SerialNumber=3
> [  934.318643] usb 4-1: Product: eGo USB
> [  934.318645] usb 4-1: Manufacturer: Iomega
> [  934.318648] usb 4-1: SerialNumber: 030000000008A169
> [  934.471393] usbcore: registered new interface driver usb-storage
> [  934.538565] scsi4 : uas
> [  934.538728] usbcore: registered new interface driver uas
> [  934.545879] scsi 4:0:0:0: Direct-Access     OEM      Ext Hard 
> Disk    0000 PQ: 0 ANSI: 5
> [  934.861863] scsi 4:0:0:1: CD-ROM            Virtual 
> CDROM                 PQ: 0 ANSI: 0
> [  934.862214] sd 4:0:0:0: Attached scsi generic sg1 type 0
> [  935.005203] sr0: scsi-1 drive
> [  935.005209] cdrom: Uniform CD-ROM driver Revision: 3.20
> [  935.005432] sr 4:0:0:1: Attached scsi CD-ROM sr0
> [  935.005574] sr 4:0:0:1: Attached scsi generic sg2 type 5
> [  935.062375] sd 4:0:0:0: [sdb] 975319088 512-byte logical blocks: 
> (499 GB/465 GiB)
> [  935.209617] sd 4:0:0:0: [sdb] Write Protect is off
> [  935.209623] sd 4:0:0:0: [sdb] Mode Sense: 10 00 00 00
> [  935.256228] sd 4:0:0:0: [sdb] Cache data unavailable
> [  935.256234] sd 4:0:0:0: [sdb] Assuming drive cache: write through
> [  935.768396]  sdb: sdb1
> [  936.116766] sd 4:0:0:0: [sdb] Attached SCSI disk
>
> While the gnome-diskutility gui shows the LUKS partition unlocked but 
> just 499 GB of unknown content.
>
> # What I tried
>
> Looking up a solution found this bug report [2] that seems to have 
> been fixed? Several versions ago.
>
> The mention using the blkid command but I am not sure what it does and 
> it requires root.  Man page says the command will tell me the file 
> system but I am guessing gnome-diskutility does that for me?
>
> Any more pointers would be great as I really want to get to the files.
>
> [1] 
> https://help.ubuntu.com/community/EncryptedFilesystemsOnRemovableStorage
> [2] https://bugs.launchpad.net/ubuntu/+source/cryptsetup/+bug/428435
>
> Thanks for your time!
>

-- 
Andres (he/him/his)
Ham United Group
RichmondMakerLabs