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Date: Fri, 22 Dec 2006 17:15:37 -0600
From: Eric Sandeen <sandeen@sandeen.net>
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To: gbakos@cfa.harvard.edu
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Subject: Re: unexpected XFS SB magic number
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Gaspar Bakos wrote:
> Dear all,
> 
> I have a 12 x 500Gb RAID-5 hardware RAID array on an ARECA 1130-ML
> controller. There is one single partition on it, exported as /dev/sdc1.
> This configuration used to work fine for 4 months.
> Then the computer crashed a couple of times, and led to a situation where
> 
> xfs_check /dev/sdc1 output is:
> 
> xfs_check: unexpected XFS SB magic number 0x45464920

That spells "EFI"

looks like somebody came along & labeled your disk for you.  Dangers of 
being on a san I suppose (if you are....)

repair might fix it....

-Eric