From: Mohammad Haque <mhaque@haque.net>
To: Andrew Morton <andrewm@uow.edu.au>
Cc: Pierre Etchemaite <petchema@concept-micro.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: ide/disk perf?
Date: Mon, 30 Oct 2000 10:44:37 -0500 [thread overview]
Message-ID: <39FD9765.F4DDE539@haque.net> (raw)
In-Reply-To: <39FCB13E.6267C38D@haque.net> <XFMail.20001030130943.petchema@concept-micro.com> <39FD7D0B.E957CA7D@uow.edu.au>
Interesting theory, but no go here.
I just remembered one other thing that may have an impact. I have a
IBM-DTLA-307045 (~45 GB i think) hanging off the same channel as slave.
The thing with that one is that if I try to do a lot of i/o on the
disk..my machine locks up. Hard. alt-sysReq doesn't even work.
I'll try disconnecting that drive when I get a chance but I welcome any
feedback/theories before I get home to do this.
Andrew Morton wrote:
>
> I had the same problem with Seagate ST313021A (13 gig) drives on
> BP6/HPT366/UDMA66. Initial throughput reported by `hdparm -t' was 22
> megs/sec which would slowly wilt to 5 megs/sec.
>
> I discovered that sending _any_ reconfiguration command to the drive -
> even one which was not supported by that particular drive - would bring
> the performance back.
>
> So when it goes slow, try running, say, `hdparm -A1' and see what
> happens.
>
> Andre and I scratched each others heads for a while, suspected a
> firmware bug. He sent an email to a contact at Seagate. This was in
> April, so I guess that person is a very slow typist.
--
=====================================================================
Mohammad A. Haque http://www.haque.net/
mhaque@haque.net
"Alcohol and calculus don't mix. Project Lead
Don't drink and derive." --Unknown http://wm.themes.org/
batmanppc@themes.org
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next prev parent reply other threads:[~2000-10-30 15:45 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
2000-10-30 13:52 ` Andrew Morton
2000-10-30 15:44 ` Mohammad Haque [this message]
2000-10-30 15:56 ` Mohammad Haque
2000-10-30 18:55 ` Pierre Etchemaite
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