Re: running xfs_repair on large partitions

[David Chinner <dgc@sgi.com>]

On Wed, Oct 10, 2007 at 07:14:52PM +0200, Emmanuel Florac wrote:
> Le Wed, 10 Oct 2007 16:33:38 +0200 vous écriviez:
> 
> > 1) it would be nice to have a way to know xfs_repair's version (-V ?),
> > when using it from a rescue disk I'm never sure if I should get a newer
> > one.
> 
> Did you try "xfs_repair -V" as you suggest? On my system, it replies with
> the version...
> 
> > 2) on a 32bit system, using xfsprogs version 2.9.0 , it seems xfs_repair
> > will fail if its process exceeds 4G. Is that right? Is there a way to
> > circumvent that limitation?
> 
> No, this is precisely what 32 bits mean. A 32 bits process can't address
> more than 2^32 bits, which is 4GB.

I think it's 2GB for a process by default on linux, because the other 2GB
is used by the kernel. The split is configurable IIRC.

> However I'm surprised you have this
> problem; I've xfs_repaired up to 16TB filesystem (maximum manageable with a
> 32 bits kernel ) without such problem.

Memory usage depends on the number of inodes in the filesystem as well.

Cheers,

Dave.
-- 
Dave Chinner
Principal Engineer
SGI Australian Software Group