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Re: [Linux-cluster] Software RAID support by GFS



Hello,

Software RAID has the same limitation as LVM1 as it's not cluster aware.  Even
with LVM2 you have to use CLVM to make sure the appropriate cluster wide locking
takes place before touching the metadata on the disk.  Software RAID has no
cluster awareness, so you could run into the same problem you would have if you
mounted an ext3 filesystem RW between two nodes, you would end up with
corruption.  This isn't a limitation with GFS, but more a limitation with md
RAID, as its not cluster aware.  Thank you,

Josef

On Tue, Dec 05, 2006 at 05:02:59PM -0800, Lin Shen (lshen) wrote:
> The GFS FAQ says that it won't work properly with software RAID since
> software RAID (the MD driver?) is not cluster-aware? Is this still the
> case? And can someone elaborate on this limitation?
> 
> Cisco Systems
> 
> Lin Shen

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