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Re: EXT3 crash: ext3_free_blocks: bit already cleared



Hi,

On Mon, Nov 26, 2001 at 09:05:38AM -0700, Craig Tierney wrote:
> I had a failure over the weekend of
> my ext3 filesystems.
> 
> Hardware:
>   Dell 2550 (dual PIII 1 Ghz, 1GB ram, Acenic GigE card)
> 
> Software:
>   linux-2.4.14
>   ext3-2.4-0.9.15-2414
>   Trond's NFS patches (pathconf, tune,read,rpc_blk)
> 
> The filesystem is RAID0 using LVM (1.0.1-rc4).  

Have you moved the LVM volume around at all while live?  LVM still has
data-corrupting bugs affecting ext3 in its volume-move code.

> I was generating high load on my nfs server
> that is using ext3 filesystems.  I started to
> get the following error:
> 
> EXT3-fs error (device lvm(58,6)): ext3_free_blocks: bit already cleared for bloc
> k 290754
> EXT3-fs error (device lvm(58,6)): ext3_free_blocks: bit already cleared for bloc
> k 289980
> EXT3-fs error (device lvm(58,6)): ext3_free_blocks: bit already cleared for bloc
> k 289981
> 
> (Many more errors than this)

Is it repeatable?

> I read that before ext3-0.9.9 that this could
> happen if the file was deleted underneath the
> process that is writing to the file.  Is this still 
> true?

It shouldn't be, no.

Cheers,
 Stephen





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