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List:       linux-xfs
Subject:    Re: bad superblock after lvextend
From:       "Frank J. Buchholz" <frankb () ercwc ! org>
Date:       2004-11-30 12:41:24
Message-ID: 41AC6A74.2070005 () ercwc ! org
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Thanks Eric.  That was it.  When I had taken the LVM back to it's 
original size I inadvertantly subtracted too many extents.  Once I made 
the LVM the corrent number of extents, I was able to read the 
filesystem.  Phew.

Big thanks!
Frank

Eric Sandeen wrote:

> Frank J. Buchholz wrote:
>
>>> Is it possible to repair this problem either through LVM or XFS? I 
>>> noticed there are a number of achieved .vg files in 
>>> /etc/lvm/archive, is it possible to restore LVM from one of these? 
>>> Or is it possible to rebuild the superblock?
>>
>
> Are you sure your lvm volume is reassembled properly... after repair 
> finds the first superblock, it checks to be sure it looks fairly sane, 
> then compares it against a number of other superblocks, checking for 
> consistency.  Here it looks like it's trying to check a superblock 
> that should be towards the end of the disk - looks like still a bit 
> under 2T - and it's failing because it can't seek out to that location 
> (not an xfs problem per se, this is a seek() system call that fails).
>
> what does xfs_info on the filesystem say - I'd double check the 
> geometry /size it reports and compare it with the size of your volume....
>
> -Eric



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