RAID Cards performance issue

[Nicolas Roussi]

Hi, I know that this topic is not the main subject matter of this list but I
was wondering if anyone has any experience with RAID adapters and
performance issues. I have already posted something on ubuntuforums.org (
http://ubuntuforums.org/showthread.php?t=1001858). I would appreciate any
input as to why the read speed on a 3ware 9650 RAID 5 would only be ~3MB/s
and a PERC5 would be 10 times that much. Is there a way to troubleshoot this
or maybe another benchmark for read and write speeds of my arrays?

Thanks

-- 
Nicolas Roussi
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