[linux-lvm] Re: lvextend error on XFS
David Greaves
david at dgreaves.com
Tue Nov 23 08:38:25 UTC 2004
Frank J. Buchholz wrote:
>>> I then noticed that the filesystem on LogVol00 was no longer available
>>> and when I ran xfs_repair it stated the following:
>>> # xfs_repair /dev/Volume00/LogVol00 Phase 1 - find and verify
>>> superblock...
>>> superblock read failed, offset 0, size 524288, ag 0, rval 0
>>>
>>> fatal error -- Invalid argument
>>
> Hello Måns
> I now realize how I created this problem, I just don't know how to fix
> it.
>
> I mistakingly added /dev/sba as the physical volume to a volume group
> that contained /dev/sba1, the one partition on sba. These are
> essentially one in the same. So when I executed the lvextend command
> device-mapper had an error. I'm honestly surprised it did anything,
> especially write over the superblock on the filesystem.
>
> Any direction on how I can recover from within LVM? I never was able
> to execute the xfs_grow so I'm hoping the data in the filesystem still
> exists.
try
xfs_repair -n -o /dev/Volume00/LogVol00
Then remove the -n
(man xfs_repair)
David
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