Filesystem problems - unable to boot

[John Dangler]

On Mon, 2006-08-07 at 09:51 -0400, Barry Tepperman wrote:
> I have become completely dependant on Ubuntu for all my personal and most of by 
> professional computing. Have successfully upgraded(except for PCMCIA wireless cards
> - another story for another time) from 5.04 - 5.10 - 6.06. After the most recent
> software update (which included a kernel upgrade to 2.6.15-26-386) now find myself
> unable to reboot. The error message IMMEDIATELY AFTER attempting to load initrd 
> in the startup sequence is "Error 16 : Inconsistent filesystem structure; press
> any key to continue....". The "press any key" gets me into the GRUB
> menu of current and previous kernels used with and without recovery mode - but none
> of them get me past the same point. I would - at the very least - like to salvage
> my data, and preferably get the system restored and running. 
> 
> So.... how to do that? I think running fsck would possibly do it, but if I go to
> comand line at the point of this error fsck is not found. Do I need to boot from
> a UbuntuLIVE CD as a recovery disk? Do I just write the whole thing off to experience
> - OBVIOUSLY not the preferred approach?
> 
> Grateful for any suggestions. Perhaps once this is resolved I'll ask about the
> wireless card - but right now that's trivial.
> 
> Barry Tepperman
> 
Grub Stage 2 errors:
13 : "Inconsistent filesystem structure"

This error is returned by the filesystem code to denote an internal
error caused by the sanity checks of the filesystem structure on disk
not matching what it expects. This is usually caused by a corrupt
filesystem or bugs in the code handling it in GRUB.

Grub loads in stages... Are there any other errors associated with this? 
(Like "Hard Disk Error", "Read Error", "Geom Error")