Re: unexpected XFS SB magic number

[Eric Sandeen <sandeen@xxxxxxxxxxx>]

Gaspar Bakos wrote:
> 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)?

EFI is a bootloader....

> > 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