Scott Marlowe <scott.marlowe@gmail.com> writes:
> We purhcased the Perc 5E, which dell wanted $728 for last fall with 8
> SATA disks in an MD-1000 and the performance is just terrible. No
> matter what we do the best throughput on any RAID setup was about 30
> megs/second write and 60 Megs/second read.
Is that sequential or a mix of random and sequential (It's too high to be
purely random i/o)? A single consumer drive should be able to beat those
numbers on sequential i/o. If it's a mix of random and sequential then
performance will obviously depend on the mix.
> I can get that from a mirror set of the same drives under linux kernel
> software RAID.
Why is that surprising? I would expect software raid to be able to handle 8
drives perfectly well assuming you had an controller and bus you aren't
saturating.
--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
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