Re: Serious XFS crash

[Emmanuel Florac <eflorac@intellique.com>]

Le Wed, 26 Mar 2008 10:36:11 +1100 vous écriviez:

> So none of the magic numbers for a directory block match.
> And FWIW, I can't see any XFs magic number in that block.
> 

There weren't any directory. As a matter of fact this FS was used to
dump (thru samba) big videos files for later use. After the repair,
there were several directories in lost+found, though...


> Oh, that's toast. Something has overwritten the start of the
> filesystem and it does not appear to be other metadata.  Well, not
> exactly the start of the filesystem - the superblock is untouched.
> 

That's weird. 

> What sector size is being used for the XFS filesystem?

Well the /dev/md0 uses 4KB blocks as default IIRC. I'll have to check
this.

> If it's
> not the same as teh filesystem block size, then XFS can't have done
> this itself because the offset that this garbage starts at would
> not be block aligned.....

Could it be an md bug then? I also had some IO errors on this setup
lately due to a dead disk, but I've changed it and it looked OK since
then, until yesterday.

regards,
Emmmanuel.

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Emmanuel Florac               www.intellique.com   
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