From: Andreas Dilger <adilger@clusterfs.com>
To: Moritz Franosch <jfranosc@physik.tu-muenchen.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: IO performance problems in 2.4.19-pre5 when writing to DVD-RAM/ZIP/MO
Date: Wed, 17 Apr 2002 10:34:53 -0600 [thread overview]
Message-ID: <20020417163453.GM20464@turbolinux.com> (raw)
In-Reply-To: <rxxadshj1rh.fsf@synapse.t30.physik.tu-muenchen.de> <20020416165358.E29747@dualathlon.random> <rxxk7r6tkh6.fsf@synapse.t30.physik.tu-muenchen.de>
On Apr 17, 2002 17:26 +0200, Moritz Franosch wrote:
> In cases 9 and 12 where performance is bad, both tested drives are on
> the same IDE controller. Should that matter?
Yes, very much. IDE is broken in this regard - you can only do I/O
to one device on the IDE channel at the same time. Either you need
to get additional IDE controllers (about $35 or so) or you split your
devices so that they are on separate IDE channels (i.e. DVD and ZIP
together, HD on the other channel if copying HD <-> DVD and HD <-> ZIP).
Of course with 2 HDs, you should probably keep them on separate channels
also.
Cheers, Andreas
--
Andreas Dilger
http://www-mddsp.enel.ucalgary.ca/People/adilger/
http://sourceforge.net/projects/ext2resize/
next prev parent reply other threads:[~2002-04-17 16:36 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <rxxadshj1rh.fsf@synapse.t30.physik.tu-muenchen.de>
2002-04-16 14:53 ` Andrea Arcangeli
2002-04-16 15:39 ` Rik van Riel
2002-04-16 16:25 ` Andrea Arcangeli
2002-04-17 15:35 ` Moritz Franosch
2002-04-16 16:09 ` Alan Cox
2002-04-16 16:40 ` Rik van Riel
2002-04-16 16:41 ` Andrea Arcangeli
2002-04-17 15:47 ` Moritz Franosch
2002-04-16 19:14 ` Roger Larsson
2002-04-17 19:12 ` Moritz Franosch
2002-04-17 15:26 ` Moritz Franosch
2002-04-17 16:34 ` Andreas Dilger [this message]
2002-04-17 17:32 ` Andrea Arcangeli
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