From: Pierre Etchemaite <petchema@concept-micro.com>
To: "Mohammad A. Haque" <mhaque@haque.net>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: RE: ide/disk perf?
Date: Mon, 30 Oct 2000 13:09:43 +0200 (CET) [thread overview]
Message-ID: <XFMail.20001030130943.petchema@concept-micro.com> (raw)
In-Reply-To: <39FCB13E.6267C38D@haque.net>
Le 30-Oct-2000, Mohammad A. Haque écrivait :
> Could someone who knows ide and drive inside and out (Andre?) please
> take a look at these figures? Am I forgetting to do something (or doing
> something I'm not suposed to) to get the best numbers? I thought I'd be
> able to get more than ~4MB/sec off the HPT366 and a UDMA66 drive.
It could be unrelated, but I had problems several times with Maxtor drives
recently; Their performances are usually high (some models give >20 Mb/s
both reads and writes), but under some conditions that I couldn't narrow down
yet, the read throughput is stuck to the floor (a few megabytes/sec) until
next reboot. The write performance is always ok.
I don't think it's a chipset problem, with a box filled with several Maxtor
drives and I observe the problem with some disk and not others at the same time.
I don't think it's a Linux problem either, since it can be observed with
Windows benchmarking tools too.
As a side note, I usually get better results tweaking disks using kernel
compiling options ("default to DMA", "autotune chipset", ...) than using hdparm
-d1 and friends, give it a try.
--
Linux blade.workgroup 2.4.0-test10 #1 Sat Oct 28 18:00:09 CEST 2000 i686 unknown
1:09pm up 1 day, 19:01, 2 users, load average: 1.04, 1.08, 1.09
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next prev parent reply other threads:[~2000-10-30 12:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-10-29 23:22 ide/disk perf? Mohammad A. Haque
2000-10-30 11:09 ` Pierre Etchemaite [this message]
2000-10-30 13:52 ` Andrew Morton
2000-10-30 15:44 ` Mohammad Haque
2000-10-30 15:56 ` Mohammad Haque
2000-10-30 18:55 ` Pierre Etchemaite
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