curious corruption 2-byte shift of all data

[Christian Kujau]

On Wed, 17 Dec 2008, Paul Raines wrote:
> [root at shadowfax ~]# e2fsck -f -n /dev/loop7
> e2fsck 1.39 (29-May-2006)
> Group descriptors look bad... trying backup blocks...
> e2fsck: Bad magic number in super-block while trying to open /dev/loop7
>
> The superblock could not be read or does not describe a correct ext2
> filesystem.  If the device is valid and it really contains an ext2
> filesystem (and not swap or ufs or something else), then the superblock
> is corrupt, and you might try running e2fsck with an alternate superblock:
>    e2fsck -b 8193 <device>

Did you try one the alternatae superblocks? (mkfs.ext3 -n might help)
Last time I myself had to use this it did not work. So I'm really curious
if e2fsck -b actually works when this message appears.

Christian.
-- 
BOFH excuse #78:

Yes, yes, its called a design limitation