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From: Ari Suutari <ari@suutari.iki.fi>
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To: Karl Pielorz <kpielorz@tdx.co.uk>, freebsd-stable@freebsd.org
Date: Thu, 15 Jan 2004 09:06:07 +0200
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Subject: Re: Adaptect raid performance with FreeBSD
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Hi,

On Wednesday 14 January 2004 15:42, Karl Pielorz wrote:
> --On 14 January 2004 15:27 +0200 Ari Suutari <ari@suutari.iki.fi> wrote:
> > Hi,
> >
> > On Wednesday 14 January 2004 15:20, Karl Pielorz wrote:
> >> > So, I get only about 25MB/s. Shouldn't I be getting something
> >> > like 70 MB/s, or even more since there are two disks that
> >> > can server read requests ?
> >>
> >> Hmmm, what happens if you run two of those at once?
> >
> > 	Running 5 dd's at once gives in iostat:
> >
> > [snip]
> >
> > 	The peak seems to be 39 Mb/s.
>
> Was that the peak 'each' - or combined? - i.e. what was the combined
> throughput for 2 dd's running?

When running 2 dd's, each reports abou 17 MB/s. iostat reports
27-33 MB/s during run.

	Ari S.