[SOLVED]Trouble Mounting a LUKS Hard Drive

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[SOLVED]Trouble Mounting a LUKS Hard Drive

Postby Under-Dev » 2018-09-10 03:35

Hi, I've been having a lot of trouble trying to mount a LUKS encrypted hard drive to recover the data on it. I've followed the directions found here (https://ubuntuforums.org/showthread.php ... ost5924459), but what I get in the end when I try to mount the logical volume is "mount: unknown filesystem type 'crypto_LUKS'." Below are the steps I've taken to mount the LV, along with the relevant output.

Code: Select all
sudo modprobe dm-crypt

sudo cryptsetup open /dev/sdb5 crypt

sudo modprobe dm-mod

sudo vgscan
>>  Reading all physical volumes.  This may take a while...
>>  Found volume group "Cringe-vg" using metadata type lvm2
>>  Found volume group "Cringe4-vg" using metadata type lvm2

sudo vgchange -a y Cringe-vg
>>  1 logical volume(s) in volume group "Cringe-vg" now active

sudo lvscan
>>  ACTIVE            '/dev/Cringe-vg/Backup' [566.13 GiB] inherit
>>  ACTIVE            '/dev/Cringe4-vg/root' [9.31 GiB] inherit
>>  ACTIVE            '/dev/Cringe4-vg/swap_1' [4.12 GiB] inherit
>>  ACTIVE            '/dev/Cringe4-vg/home' [98.12 GiB] inherit

sudo mount /dev/Cringe-vg/Backup /media/temp
>>  mount: unknown filesystem type 'crypto_LUKS'


Any help would be greatly appreciated.
Last edited by Under-Dev on 2018-09-12 09:40, edited 1 time in total.
Under-Dev
 
Posts: 3
Joined: 2018-09-10 03:16

Re: Trouble Mounting a LUKS Hard Drive

Postby p.H » 2018-09-10 07:12

It seems that the logical volume is used as a LUKS container too. You have to open it with cryptsetup.

Confirm with
Code: Select all
lsblk
blkid
p.H
 
Posts: 523
Joined: 2017-09-17 07:12

Re: Trouble Mounting a LUKS Hard Drive

Postby Under-Dev » 2018-09-12 08:34

p.H wrote:It seems that the logical volume is used as a LUKS container too. You have to open it with cryptsetup.

Confirm with
Code: Select all
lsblk
blkid


Great! I've opened Cringe-vg/Backup. Now with blkid I get:

Code: Select all
sdb                        8:16   0 596.2G  0 disk 
├─sdb1                     8:17   0   243M  0 part 
├─sdb2                     8:18   0     1K  0 part 
└─sdb5                     8:21   0   596G  0 part 
  └─crypt                254:4    0   596G  0 crypt
    └─Cringe--vg-Backup  254:5    0 566.1G  1 lvm   
      └─backup           254:6    0 566.1G  1 crypt


My only question is how to mount "backup".

This is what I've tried so far.

Code: Select all
sudo mount /dev/Cringe-vg/Backup /media/temp
>>  mount: unknown filesystem type 'crypto_LUKS'

sudo mount /dev/mapper/backup /media/temp
>>  mount: wrong fs type, bad option, bad superblock on /dev/mapper/backup,
>>         missing codepage or helper program, or other error
>> 
>>         In some cases useful info is found in syslog - try
>>         dmesg | tail or so.


Running dmesg I get:

Code: Select all
EXT4-fs (dm-6): bad geometry: block count 156218880 exceeds size of device (148407808 blocks)


(By the way, I really appreciate your help.)
Under-Dev
 
Posts: 3
Joined: 2018-09-10 03:16

Re: Trouble Mounting a LUKS Hard Drive

Postby Under-Dev » 2018-09-12 09:39

Never mind about the error. I realized it was because I had resized the logical volume previously. I was able to size the volume to the correct size again using

Code: Select all
sudo lvresize -l+100%FREE /dev/Cringe-vg/Backup
sudo cryptsetup resize backup


Thank you very much for the help!
Under-Dev
 
Posts: 3
Joined: 2018-09-10 03:16


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