> RAID-1 will be about 50% faster than RAID-5 doing reads regardless of 
> size, and will also be *much* faster doing small writes-- by a factor 
> of 4, perhaps.

The abovementioned figures seem more like comparing RAID-0 (striping)
to RAID-5 (striping with ECC) than RAID-5 to RAID-1 (mirroring).  In
my experience mirroring is always the slowest RAID in terms of
retrieving data, writes might be quite comparable with RAID-1 and
RAID-5 though.


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