From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265757AbTL3LVc (ORCPT ); Tue, 30 Dec 2003 06:21:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265758AbTL3LVc (ORCPT ); Tue, 30 Dec 2003 06:21:32 -0500 Received: from port117.ds1-abc.adsl.cybercity.dk ([212.242.125.56]:39778 "EHLO mail.imaginere.dk") by vger.kernel.org with ESMTP id S265757AbTL3LVW (ORCPT ); Tue, 30 Dec 2003 06:21:22 -0500 Date: Tue, 30 Dec 2003 12:21:19 +0100 From: Nuno Alexandre To: Cc: "Nicklas Bondesson" Subject: Re: IDE-RAID Drive Performance Message-Id: <20031230122119.1566247a@Genbox> In-Reply-To: References: Organization: Fluxmod - www.imaginere.dk X-Mailer: Sylpheed version 0.9.8claws (GTK+ 1.2.10; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: multipart/signed; protocol="application/pgp-signature"; micalg="pgp-sha1"; boundary="Signature=_Tue__30_Dec_2003_12_21_19_+0100_Eg6RwAbu6uQOXPfU" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --Signature=_Tue__30_Dec_2003_12_21_19_+0100_Eg6RwAbu6uQOXPfU Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline Content-Transfer-Encoding: 7bit On Tue, 30 Dec 2003 11:44:01 +0100 Mr(s): Nicklas Bondesson wrote: > Hi! > > I think i'm getting really bad values from my disks. It's two Western > Digital WD800JB-00DUA3 (Special Edition 8 MB cache) disks connected to a > Promise TX2000 (PDC20271) card (RAID1 using ataraid under Linux 2.4.23). > > The disks are setup with hdparm at boot time: > > /sbin/hdparm -X69 -d1 -u1 -m16 -c3 /dev/hda > /sbin/hdparm -X69 -d1 -u1 -m16 -c3 /dev/hdc > > When running hdparm -tT I get the following: > > /dev/hda: > Timing buffer-cache reads: 128 MB in 1.13 seconds =113.27 MB/sec > Timing buffered disk reads: 64 MB in 2.46 seconds = 26.02 MB/sec > > /dev/hdc: > Timing buffer-cache reads: 128 MB in 1.13 seconds =113.27 MB/sec > Timing buffered disk reads: 64 MB in 2.47 seconds = 25.91 MB/sec > > Are these normal values? I don't think so. Please advise. > > /Nicke Hi. This is what i get with a Maxtor 6Y120L0 (2MB cache): /dev/hda: Timing buffer-cache reads: 1320 MB in 2.00 seconds = 659.44 MB/sec Timing buffered disk reads: 140 MB in 3.02 seconds = 46.40 MB/sec Using: -d1 -u1 -m16 -c3 -W1 -A1 -k1 -X70 -a 8192 I'm not using raid, its a single disk connected to IDE1 on the motherboard. Maybe you can try those parameters and see if it helps :) -- Best regards - Nuno Alexandre - na@imaginere.dk Gpg: EA74637D - http://imaginere.dk - iM:ikaro@jabber.org --Signature=_Tue__30_Dec_2003_12_21_19_+0100_Eg6RwAbu6uQOXPfU Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (GNU/Linux) iD8DBQE/8V+vYtUZn+p0Y30RApNQAJ9rgC4mTg5Cb3iMw2eDeIDc1lJ7WACeLc0x 2vcqgWipfO7IGZKuT3O04jY= =7TmD -----END PGP SIGNATURE----- --Signature=_Tue__30_Dec_2003_12_21_19_+0100_Eg6RwAbu6uQOXPfU--