Upgrading Ubuntu and no longer access to my encrypted home partition

I recently upgraded my laptop to the latest Ubuntu 8. The upgrade process was easy and quick however after the reboot I was unable to access my home-directory. I have a separate partition on which /home is mounted. This partition is encrypted with cryptsetup.

When I start the cryptdisk daemon it returns an error:

/etc/init.d/cryptdisks start
* Starting remaining cryptodisks...
mount: special device /dev/mapper/cryptohome does not exist
Enter passphrase:

Checking the status with cryptdisk doesn’t show any errors:
/dev/mapper/cryptohome is active:
cipher: aes-cbc-plain
keysize: 256 bits
device: /dev/sda3
offset: 0 sectors
size: 40949685 sectors
mode: read/write

And the device is there:
ls -l /dev/mapper/
total 0
crw-rw---- 1 root root 10, 63 2008-07-12 17:20 control
brw-rw---- 1 root disk 254, 0 2008-07-12 17:47 cryptohome

Crypttab is also configured correctly:

cryptohome /dev/sda3 none vol_id

Mounting the /home partition on /dev/mapper/cryptohome (as root) returns :

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

with these errors in dmesg
[ 1966.915329] VFS: Can't find ext3 filesystem on dev dm-0

Creating new encrypted partitions (with similar settings) works like a charm. The partition worked perfectly for months before the upgrade and currently I don’t have any clue on how to access my encrypted data. Any help would be highly appreciated.


The problem was not tied to cryptsetup but to something entirely different. My passphrase contains a number of special characters. My keyboard layout was changed to something without the “µ ù ç^” characters. I didn’t notice this during the test because then I was using a rather simple passphrase.

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