From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265736AbTL3KoD (ORCPT ); Tue, 30 Dec 2003 05:44:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265738AbTL3KoD (ORCPT ); Tue, 30 Dec 2003 05:44:03 -0500 Received: from as1-6-4.ld.bonet.se ([194.236.130.199]:1152 "HELO mail.nicke.nu") by vger.kernel.org with SMTP id S265736AbTL3KoB (ORCPT ); Tue, 30 Dec 2003 05:44:01 -0500 From: "Nicklas Bondesson" To: Subject: IDE-RAID Drive Performance Date: Tue, 30 Dec 2003 11:44:01 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook, Build 11.0.5510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Thread-Index: AcPOwYZX1THKwd2pRtWQ28xphNmQfgAADE8w Message-Id: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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