[NCLUG] XFS, "Can't read superblock"

[Stephen Warren]

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Chad Perrin wrote:
> My father uses a Linux box as a fileserver.  The partition on which he
> stores all the important data uses an XFS filesystem.  This weekend,
> that filesystem, which comprises one entire hard drive, stopped working.
> 
> The most prominent,
> common, and troubling error amongst all attempts to do anything with the
> drive reads "Can't read superblock".

There may be some options to the xfs tools to use an alternate
superblock (I don't recall if xfs has them). If it's just a matter of
one area on the HDD having been corrupted, and having taken out the main
superblock, then using a different superblock might help. I guess this
could be a filesystem-specific mount option too. I don't know how you'd
find out where on the disk the other superblocks are, but I imagine any
man pages detailing how to use alternate superblocks would help.
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