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

[a75576 at alumni.tecnun.es]

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