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Date:      Mon, 3 Aug 1998 13:00:16 -0600 (MDT)
From:      "Justin T. Gibbs" <gibbs@narnia.plutotech.com>
To:        Serge Egelman <serge@egel2.med.umn.edu>
Cc:        aic7xxx@FreeBSD.ORG
Subject:   Re: seagate cheetah LVD
Message-ID:  <199808031900.NAA02004@narnia.plutotech.com>
In-Reply-To: <35C5EDE4.1C6724E@egel2.med.umn.edu>

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In article <35C5EDE4.1C6724E@egel2.med.umn.edu> you wrote:
> hi,
>     after finally getting my 2940u2w to work under linux I found that
> there is absolutely no improvement over my AIC-7895 (on board).  I am
> getting only 18 mb/s sustained.  I talked to the seagate people and they
> said this is normal.  But I know I can get faster because the cheetah on
> the sgi octane does about 30-40 mb/s.  Is there any way of getting
> faster than 18 mb/s?

30-40MB/s for reads or writes?  If you do the math (rotational speed plus
media density), the drive simply can't go faster than ~18MB/s, so the
Octane must either have a lots of memory dedicated to a write buffer, or
you are reading data that the SGI's VM system already has in core.

--
Justin

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