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To: Peter Jeremy <peterjeremy@optushome.com.au>
From: Ian FREISLICH <if@hetzner.co.za>
In-Reply-To: Message from Peter Jeremy <peterjeremy@optushome.com.au> of "Wed,
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Cc: Robert Huff <roberthuff@rcn.com>, freebsd-current@freebsd.org
Subject: Re: Interesting speed benchmarks 
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Peter Jeremy wrote:
> On Tue, 2007-Jan-30 15:00:47 -0500, Robert Huff wrote:
> >huff@>>dump 0 -La -C 32 -f /dev/null /usr >& /tmp/null_dump
> >  DUMP: DUMP: 27162681 tape blocks on 1 volume
> >  DUMP: finished in 12961 seconds, throughput 2095 KBytes/sec
> 
> Still fairly atrocious.  What about:

As a random datapoint that might or might not be related.  In the
last year or so I was pontificating about how much better SCSI was
that IDE/ATA to my boss.  I then did some benchmarks on my (CURRENT)
system and discovered that an old 10Gig 7.5krpm UDMA33 disk
significantly out perform some Seagate Cheatah LVD 10krpm disks.
If you're interested, I'll see if I still have a copy of the
benchmarks.

Last time I looked, ahc(4) was still under GIANT.  The ATA system
has had a significant overhaul.

Ian

--
Ian Freislich