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SubjectRAID 5 performance problems

>Tos be certain that this was not the bottleneck, I removed it
>from the raid so that is runs in degraded mode. This did not
>change the performance much


Don't do that and expect a valid performance test.

On average, one-fifth of all array reads will cause reads from all four
remaining disks in order to reconstruct the missing data when you run
in that mode.

--
Chuck
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