From owner-freebsd-questions@FreeBSD.ORG Thu Mar 2 10:39:20 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 03D0016A420 for ; Thu, 2 Mar 2006 10:39:20 +0000 (GMT) (envelope-from xfb52@dial.pipex.com) Received: from asmtp-out3.blueyonder.co.uk (asmtp-out3.blueyonder.co.uk [195.188.213.62]) by mx1.FreeBSD.org (Postfix) with ESMTP id AA28D43D4C for ; Thu, 2 Mar 2006 10:39:13 +0000 (GMT) (envelope-from xfb52@dial.pipex.com) Received: from [82.41.254.103] (helo=[192.168.0.2]) by asmtp-out3.blueyonder.co.uk with esmtp (Exim 4.52) id 1FElDB-0002t5-Lm; Thu, 02 Mar 2006 10:39:09 +0000 Message-ID: <4406CB4D.5050300@dial.pipex.com> Date: Thu, 02 Mar 2006 10:39:09 +0000 From: Alex Zbyslaw User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-GB; rv:1.7.12) Gecko/20051106 X-Accept-Language: en MIME-Version: 1.0 To: Beastie References: <61560.207.70.139.52.1139628926.squirrel@www.compedgeracing.com> <6C543300-579C-4313-A355-0F26181B3FA7@todoo.biz> <067101c63216$a7682f10$c801a8c0@nexpc> <65260.207.70.139.52.1139998857.squirrel@www.compedgeracing.com> <06b901c63220$3a849eb0$c801a8c0@nexpc> <50778.207.70.139.52.1140002253.squirrel@www.compedgeracing.com> <43F3EDD6.80707@mra.co.id> <44052663.7000802@mra.co.id> <440565FF.3030002@mra.co.id> <44058D9E.3010801@dial.pipex.com> <440675E0.1020204@mra.co.id> In-Reply-To: <440675E0.1020204@mra.co.id> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Liste FreeBSD Subject: Re: SATA Raid (stress test..) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 02 Mar 2006 10:39:20 -0000 Beastie wrote: > > second tools is diskinfo, but i'm not quite happy with the result. > > #diskinfo -t /dev/amrd0s1d > /dev/amrd0s1d > 512 # sectorsize > 999996609024 # mediasize in bytes (931G) > 1953118377 # mediasize in sectors > 121575 # Cylinders according to firmware. > 255 # Heads according to firmware. > 63 # Sectors according to firmware. > > Seek times: > Full stroke: 250 iter in 5.233346 sec = 20.933 msec > Half stroke: 250 iter in 3.828152 sec = 15.313 msec > Quarter stroke: 500 iter in 6.232849 sec = 12.466 msec > Short forward: 400 iter in 2.409001 sec = 6.023 msec > Short backward: 400 iter in 2.594473 sec = 6.486 msec > Seq outer: 2048 iter in 0.638372 sec = 0.312 msec > Seq inner: 2048 iter in 0.671994 sec = 0.328 msec > Transfer rates: > outside: 102400 kbytes in 1.102065 sec = 92916 > kbytes/sec > middle: 102400 kbytes in 1.209657 sec = 84652 > kbytes/sec > inside: 102400 kbytes in 1.912485 sec = 53543 > kbytes/sec Why not happy? Transfer rates from 53 to 92Mb/s, give or take; what's wrong with that? On a plain sata disk I get: Seek times: Full stroke: 250 iter in 4.717248 sec = 18.869 msec Half stroke: 250 iter in 5.342099 sec = 21.368 msec Quarter stroke: 500 iter in 8.870424 sec = 17.741 msec Short forward: 400 iter in 2.753187 sec = 6.883 msec Short backward: 400 iter in 1.390941 sec = 3.477 msec Seq outer: 2048 iter in 0.426796 sec = 0.208 msec Seq inner: 2048 iter in 0.487280 sec = 0.238 msec Transfer rates: outside: 102400 kbytes in 1.652736 sec = 61958 kbytes/sec middle: 102400 kbytes in 1.697364 sec = 60329 kbytes/sec inside: 102400 kbytes in 1.834759 sec = 55811 kbytes/sec A second, different, disk gives me better seek times but roughly similar transfer rates. So I beat your inside transfer rate, but you're 50% up on the outside rate. If you have windows anywhere, then download sandra-lite. Among other things, it has comparison benchmarks for all its tests, including disk transfer rates for things like SCSI-RAID0, RAID1, SATA/PATA-RAID0/1 etc. --Alex