Relative performance of RAID-5 algorithms

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Hi all,

There are four different "checksumming algorithms" -- really, disk
layouts, in Linux.  Is there anything "known" about the relative
performance of these?  The default for mdadm and mkraid is currently
left-symmetric; is that a sensible default?

I'm asking because I'm trying to get my RAID-6 project going, and
these layouts get a lot more complex with two redundancy drives.
Thus, I'm considering just supporting one disk layout at this point,
and I'd like to pick one :)

	-hpa
-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
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"Unix gives you enough rope to shoot yourself in the foot."
Architectures needed: ia64 m68k mips64 ppc ppc64 s390 s390x sh v850 x86-64
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