From owner-freebsd-questions@FreeBSD.ORG Thu Mar 2 14:41:40 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 0CBFB16A420 for ; Thu, 2 Mar 2006 14:41:40 +0000 (GMT) (envelope-from nikolas.britton@gmail.com) Received: from xproxy.gmail.com (xproxy.gmail.com [66.249.82.201]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4239C43D49 for ; Thu, 2 Mar 2006 14:41:39 +0000 (GMT) (envelope-from nikolas.britton@gmail.com) Received: by xproxy.gmail.com with SMTP id s11so275972wxc for ; Thu, 02 Mar 2006 06:41:38 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=ai6dthI3UsXhVgx1vRRS9ys0nRl487A8jV4ZmfT5aU5ThRcv9UoZ2CkuNKN+uskkXt/xNl7JTs3g3VgzgyglVpG85aTL5jTFtxPWP+fYd773LMU7pYHj8FUUnEe2GVs7c+zYCFk51RRgX79LCqsdThUA8Yk/FqSiHbq6XZeMyjw= Received: by 10.70.110.20 with SMTP id i20mr3332735wxc; Thu, 02 Mar 2006 06:41:33 -0800 (PST) Received: by 10.70.65.9 with HTTP; Thu, 2 Mar 2006 06:41:33 -0800 (PST) Message-ID: Date: Thu, 2 Mar 2006 08:41:33 -0600 From: "Nikolas Britton" To: "Alex Zbyslaw" In-Reply-To: <4406CB4D.5050300@dial.pipex.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline References: <61560.207.70.139.52.1139628926.squirrel@www.compedgeracing.com> <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> <4406CB4D.5050300@dial.pipex.com> Cc: Beastie , 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 14:41:40 -0000 On 3/2/06, Alex Zbyslaw wrote: > [snipped] > > 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 =3D 18.869 msec > Half stroke: 250 iter in 5.342099 sec =3D 21.368 msec > Quarter stroke: 500 iter in 8.870424 sec =3D 17.741 msec > Short forward: 400 iter in 2.753187 sec =3D 6.883 msec > Short backward: 400 iter in 1.390941 sec =3D 3.477 msec > Seq outer: 2048 iter in 0.426796 sec =3D 0.208 msec > Seq inner: 2048 iter in 0.487280 sec =3D 0.238 msec > Transfer rates: > outside: 102400 kbytes in 1.652736 sec =3D 61958 kbyte= s/sec > middle: 102400 kbytes in 1.697364 sec =3D 60329 kbyte= s/sec > inside: 102400 kbytes in 1.834759 sec =3D 55811 kbyte= s/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. > diskinfo -t /dev/da0e /dev/da0 512 # sectorsize 1756440297472 # mediasize in bytes (1.6T) 3430547456 # mediasize in sectors 213541 # Cylinders according to firmware. 255 # Heads according to firmware. 63 # Sectors according to firmware. Seek times: Full stroke: 250 iter in 3.502539 sec =3D 14.010 msec Half stroke: 250 iter in 2.749807 sec =3D 10.999 msec Quarter stroke: 500 iter in 4.919431 sec =3D 9.839 msec Short forward: 400 iter in 2.257898 sec =3D 5.645 msec Short backward: 400 iter in 2.293915 sec =3D 5.735 msec Seq outer: 2048 iter in 0.132233 sec =3D 0.065 msec Seq inner: 2048 iter in 0.152473 sec =3D 0.074 msec Transfer rates: outside: 102400 kbytes in 1.487112 sec =3D 68858 kbytes/= sec middle: 102400 kbytes in 1.505039 sec =3D 68038 kbytes/= sec inside: 102400 kbytes in 1.336495 sec =3D 76618 kbytes/= sec This and all the other benchmarks you've run are useless. Run a real benchmark like iozone. It's in ports under benchmarks/iozone. http://www.iozone.org/ -- BSD Podcasts @ http://bsdtalk.blogspot.com/