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Date:      Fri, 18 Apr 2003 09:44:28 -0400
From:      David Gilbert <dgilbert@velocet.ca>
To:        argo <hostmaster@ns.purk.ee>
Cc:        freebsd-performance@freebsd.org
Subject:   aic7892 trouble
Message-ID:  <16032.316.217010.480864@canoe.velocet.net>
In-Reply-To: <1050669889.575.12.camel@station.purk.ee>
References:  <1050669889.575.12.camel@station.purk.ee>

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>>>>> "argo" == argo  <hostmaster@ns.purk.ee> writes:

argo> Hi folks, I have Adaptec U160 Host-Adapter with 2x Atlas 10k
argo> disks.When i copy large files (~700MB) then performance is
argo> pretty bad.I got only about 35MB/sec between those 2
argo> disks.Theres no difference 4.x or 5 -current.  I made couple of
argo> custom kernels with different options but no luck.  Could that
argo> be related with bad cable issue?

That's about expected thruput for 18G 10k disks.  If you buy 36G 10k
disks, you'll likely get 70-ish meg/s ... +- how good your PCI bus is.

Dave.

-- 
============================================================================
|David Gilbert, Velocet Communications.       | Two things can only be     |
|Mail:       dgilbert@velocet.net             |  equal if and only if they |
|http://daveg.ca                              |   are precisely opposite.  |
=========================================================GLO================



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