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Date:      Tue, 6 Jan 2004 09:48:12 -0800
From:      "Mike Maltese" <mike@pcmedx.com>
To:        <questions@freebsd.org>
Cc:        Derek Marcotte <derek@cpainc.ca>
Subject:   Re: Poor SCSI disk preformance
Message-ID:  <012d01c3d47d$40fe8b50$f4f0a8c0@pcmedx.com>
References:  <000201c3d461$eea71770$0301a8c0@office.cpainc.net>

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> I also had (meaning it is not currently attached) a different
> SCSI drive attached on the bus, with the same results.  Has
> anyone any tips for this from a FreeBSD point of view?

I wouldn't say that dd is the greatest benchmarking tool. You may want to
try benchmarks/rawio. Also, try monitoring diffferent types of transfers to
and from another physical disk with iostat. I'm not sure what your speed
expectations are, but you're running a 7200 RPM Ultra Wide disk on an Ultra
Wide host adapter; not exactly the fastest SCSI technology.



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