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Date: Fri, 22 Dec 2006 18:28:38 -0500 (EST)
From: Gaspar Bakos <gbakos@cfa.harvard.edu>
Reply-To: gbakos@cfa.harvard.edu
To: Eric Sandeen <sandeen@sandeen.net>
cc: linux-xfs@oss.sgi.com
Subject: Re: unexpected XFS SB magic number
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Hi, Eric,

RE:
> > xfs_check: unexpected XFS SB magic number 0x45464920
> That spells "EFI"

Does this have any special meaning? E.g. I could figure out who
labelled the disk (array)?

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

Humm. This is an FC5 with SMP opteron. The RAID-5 (12 disks) is ran by
an ARECA 1130-ML card.

> repair might fix it....

I worry that what repair will leave behind is pure numbers (and many of those), like
11212/
12133/
121212/
...
and to reconstruct ~3Tb from that is not trivial...

This reminds me: what paranoid safety measures can one take? E.g keep
an external log of the filesystem as well?

Thanks for the thoughts!

Gaspar