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Date: Thu, 16 Mar 2006 08:43:03 -0500
From: Chuck Swiger <cswiger@mac.com>
Organization: The Courts of Chaos
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To: Don O'Neil <don@lizardhill.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Raidtest/3Ware 6000 Throughput
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Don O'Neil wrote:
[ ... ]
> Does this seem accurate? Should I only be seeing 4.7 MB/second throughput or
> is raidtest just not a good way to measure peak throughput?
> 
> Any thoughts would be appreciated.

It does not astonish me that you get 5 MB/s on a RAID-5 config, although if you
used SCSI and/or a real HW RAID-5 controller with significant cache (ie, 64+ MB)
that would help the performance by quite a bit.

Use RAID-5 for read-only or read-mostly situations and you'll be better off; use
RAID-10 for write-heavy filesystems instead.

-- 
-Chuck