Can someone make sense of this error for me?

[lucid]

I got this when trying to mount my external truecrypted device:

Code: [Select]

mount: wrong fs type, bad option, bad superblock on /dev/mapper/truecrypt1,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail or so

So I ran dmesg | tail and got this:

Code: [Select]

[  157.832141] sd 9:0:0:0: [sdc] Attached SCSI removable disk
[  181.324341] device-mapper: uevent: version 1.0.3
[  181.324426] device-mapper: ioctl: 4.23.0-ioctl (2012-07-25) initialised: dm-devel@redhat.com
[  181.923021] EXT4-fs (dm-0): mounting ext3 file system using the ext4 subsystem
[  181.967791] EXT4-fs (dm-0): ext4_check_descriptors: Block bitmap for group 512 not in group (block 105682011)!
[  181.967798] EXT4-fs (dm-0): group descriptors corrupted!
[  369.387981] warning: `VirtualBox' uses 32-bit capabilities (legacy support in use)
[  427.638613] EXT4-fs (dm-0): mounting ext3 file system using the ext4 subsystem
[  427.684393] EXT4-fs (dm-0): ext4_check_descriptors: Block bitmap for group 512 not in group (block 105682011)!
[  427.684401] EXT4-fs (dm-0): group descriptors corrupted!

So what I want to know is how to fix it if I even can. If I can't I'll probably commit painful suicide because this container was VERY full of VERY important things and ALOT of them. I've downloaded/found this stuff over the course of a LONG time and it fucking sucks that this happened. Fuck

Thanks.

[z3ro]

[~]  create the /dev/mapper/truecrypt1 device without trying to mount the contained file system

Code: [Select]

sudo truecrypt --filesystem=none --slot=1 /dev/sdc1

[~] To confirm that there is still readable data to be found, you could first do something like this to look for text content

Code: [Select]

sudo cat /dev/mapper/truecrypt1 | strings

Assuming the /dev/mapper/truecrypt1 block device has been successfully created, you can run normal tools like fsck on that device. 

[lucid]

Thanks for the response but I'm not sure how this helps. I ran the first command you posted and while I can see the device in Thunar I can't actually open it. I ran the second command and so far my terminal is just spitting out neverending unreadable strings at me.

Am I missing something? Am I able to get this thing remounted or recover any of the files from it?

[bluechill]

Thanks for the response but I'm not sure how this helps. I ran the first command you posted and while I can see the device in Thunar I can't actually open it. I ran the second command and so far my terminal is just spitting out neverending unreadable strings at me.

Am I missing something? Am I able to get this thing remounted or recover any of the files from it?

Unfortunately, if truecrypt cannot mount the drive then you are pretty much out of luck.  You might be able to decrypt it manually though because of how it works however since truecrypt cannot mount it you are pretty much guaranteed to have lost *some* data.

[lucid]

I kinda figured. Well I suppose I'll close this error thread. Thanks guys.