Re: New RAID-6 snapshot

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On Tue, Dec 30, 2003 at 10:35:53AM -0800, H. Peter Anvin wrote:
> Mike Fedyk wrote:
> >On Tue, Dec 30, 2003 at 03:34:28AM -0800, H. Peter Anvin wrote:
> >
> >>Well, I implemented read-modify-write for RAID-6, and at least on my
> >>6-disk system it was a small but measurable performance *loss*.
> >
> >What was your previous patch doing instead?
> 
> The published snapshots (including the latest, since I backed out 
> read-modify-write) all do read-reconstruct-write.

Does that mean that RRW (as the name seems to imply) would need to read the
entire stripe before it could write back the updated stripe compared to a
partial read with RMW? 
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