Re: ext3 corruption

[Molle Bestefich]

Molle Bestefich wrote:
> I have a ~1TB filesystem that fails to mount, the message is:
>
> EXT3-fs error (device loop0): ext3_check_descriptors: Block bitmap for
> group 2338 not in group (block 1607003381)!
> EXT3-fs: group descriptors corrupted !
>
> A day before, it worked flawlessly.
>
> What could have happened, and what's the best course of action?

I should probably mention that I've been bitten by e2fsck before.
I had a filesystem with minor damage, but after running e2fsck it was
completely nuked.
Nothing was recoverable.

So before anyone suggest running e2fsck, I'd really like someone
knowledgeable to tell me what e2fsck is going to do about "group
descriptors corrupted" *BEFORE* I go ahead and blindly run it.
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