RAID-3? (was: cvs commit: src MAINTAINERS)

Greg 'groggy' Lehey grog at FreeBSD.org
Sat Aug 21 01:32:11 PDT 2004


On Saturday, 21 August 2004 at 10:06:14 +0200, Pawel Jakub Dawidek wrote:
> So as you can see there are no difference in reading (actually
> reading in degraded mode is even a bit faster, hard to say why).

I would have half expected this.  If you're reading parity as well,
then without spindle sync it will take longer for three I/Os to
complete than 2.  In a fractionally different context, I describe a
similar result for RAID-5 at
http://www.vinumvm.org/vinum/implementation.html.

Greg
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