Did you edit your fstab or have a poweroutage/system crash? Has the system worked previously?

You could check out the response in this thread: http://www.linode.com/forums/archive...uperblock.html

Also take a look at 'man fsck' if you can. If you can log into the command line you might try
'fsck -A' (edit) Actually since you are most likely using ext2 or ext3 filesystem try 'man e2fsck' Good luck!