From owner-freebsd-questions@FreeBSD.ORG Sun Jul 23 08:15:50 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 83D7C16A4DA for ; Sun, 23 Jul 2006 08:15:50 +0000 (UTC) (envelope-from richard@firebadger.net) Received: from mail.firebadger.net (82-69-4-157.dsl.in-addr.zen.co.uk [82.69.4.157]) by mx1.FreeBSD.org (Postfix) with SMTP id 8CC8943D45 for ; Sun, 23 Jul 2006 08:15:49 +0000 (GMT) (envelope-from richard@firebadger.net) Received: (qmail 11296 invoked by uid 1011); 23 Jul 2006 08:14:25 -0000 Received: from 192.168.1.10 by brian.firebadger.net (envelope-from , uid 1009) with qmail-scanner-1.25-st-qms (clamdscan: 0.88.1/1449. spamassassin: 3.1.1. perlscan: 1.25-st-qms. Clear:RC:0(192.168.1.10):SA:0(-4.3/5.0):. Processed in 1.611268 secs); 23 Jul 2006 08:14:25 -0000 X-Spam-Status: No, hits=-4.3 required=5.0 X-Antivirus-FIREBADGER-Mail-From: richard@firebadger.net via brian.firebadger.net X-Antivirus-FIREBADGER: 1.25-st-qms (Clear:RC:0(192.168.1.10):SA:0(-4.3/5.0):. Processed in 1.611268 secs Process 11288) Received: from unknown (HELO ?192.168.1.10?) (richard@firebadger.net@192.168.1.10) by mail.firebadger.net with SMTP; 23 Jul 2006 08:14:22 -0000 Message-ID: <44C3302A.5070803@firebadger.net> Date: Sun, 23 Jul 2006 09:15:38 +0100 From: Richard Collyer User-Agent: Thunderbird 1.5.0.4 (Windows/20060516) MIME-Version: 1.0 To: freebsd-questions@freebsd.org References: <44C26B7A.30200@firebadger.net> <44C27E7B.3070103@firebadger.net> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: Slow Write Performance on 3ware controller 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: Sun, 23 Jul 2006 08:15:50 -0000 Nikolas Britton wrote: > On 7/22/06, Richard Collyer wrote: >> Completely ignore me. Write caching wasnt turned on. >> > > Even with write caching off you should be able to hit 50MB/s... did I > missing something? Try running 'diskinfo -t /dev/diskname'. For > refrence here are the numbers from my single 400GB Seagate ST3400832AS > drive, if you can't bet it then something is wrong with your setup: I get: [root@brian:/home/richard] $ diskinfo -t /dev/da0 /dev/da0 512 # sectorsize 499977814016 # mediasize in bytes (466G) 976519168 # mediasize in sectors 60785 # Cylinders according to firmware. 255 # Heads according to firmware. 63 # Sectors according to firmware. Seek times: Full stroke: 250 iter in 2.572859 sec = 10.291 msec Half stroke: 250 iter in 2.957264 sec = 11.829 msec Quarter stroke: 500 iter in 6.256571 sec = 12.513 msec Short forward: 400 iter in 2.555676 sec = 6.389 msec Short backward: 400 iter in 2.474576 sec = 6.186 msec Seq outer: 2048 iter in 0.556584 sec = 0.272 msec Seq inner: 2048 iter in 0.593798 sec = 0.290 msec Transfer rates: outside: 102400 kbytes in 2.080951 sec = 49208 kbytes/sec middle: 102400 kbytes in 2.102060 sec = 48714 kbytes/sec inside: 102400 kbytes in 2.054728 sec = 49836 kbytes/sec Not too bad, not too great. Cheers Richard