From owner-freebsd-stable@FreeBSD.ORG Sat Sep 9 13:53:10 2006 Return-Path: X-Original-To: stable@freebsd.org Delivered-To: freebsd-stable@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6D4C816A403; Sat, 9 Sep 2006 13:53:10 +0000 (UTC) (envelope-from killing@multiplay.co.uk) Received: from multiplay.co.uk (core6.multiplay.co.uk [85.236.96.23]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9AAD943D49; Sat, 9 Sep 2006 13:53:09 +0000 (GMT) (envelope-from killing@multiplay.co.uk) Received: from vader ([212.135.219.179]) by multiplay.co.uk (multiplay.co.uk [85.236.96.23]) (MDaemon PRO v9.0.1) with ESMTP id md50002974853.msg; Sat, 09 Sep 2006 14:52:48 +0100 Message-ID: <079e01c6d417$3890fc40$b3db87d4@multiplay.co.uk> From: "Steven Hartland" To: "Mark Kirkwood" References: <44EC0B9B.5020705@withagen.nl> <003f01c6c68d$64688e60$b3db87d4@multiplay.co.uk> <20060907184316.GC56998@svcolo.com> <035701c6d2c3$eb574aa0$b3db87d4@multiplay.co.uk> <001001c6d327$25dc07c0$b3db87d4@multiplay.co.uk> <4502123D.705@paradise.net.nz> Date: Sat, 9 Sep 2006 14:52:34 +0100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 X-Spam-Processed: multiplay.co.uk, Sat, 09 Sep 2006 14:52:48 +0100 (not processed: message from valid local sender) X-MDRemoteIP: 212.135.219.179 X-Return-Path: killing@multiplay.co.uk X-MDAV-Processed: multiplay.co.uk, Sat, 09 Sep 2006 14:52:48 +0100 Cc: amd64@freebsd.org, Jo Rhett , stable@freebsd.org Subject: Re: suggestions for SATA RAID cards X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 09 Sep 2006 13:53:10 -0000 Mark Kirkwood wrote: > Just out of interest what RAID level was the 5 disk array? - as > 180Mb/s from an Areca 5 disk RAID0 or RAID5 array is not that good - > my old 3Ware 7506 with 4 Maxtor IDE RAID0 gets 175Mb/s. Obviously if > your array is RAID10, the 180MB/s is very good! > > If you are using RAID0|5, then something is slowing you down (possible > clash between disk firmware and the Areca, or unfortunate choice of > strip chunk size). Dont know which test I was remembering but just did a quicky: OS: FreeBSD 6.1 RAID: 5 on 5 * 400GB Seagate Controller: HighPoint 1820a CPU: Dual Opteron 244 RAM: 2Gb /usr/bin/time -h dd if=/dev/da0 of=/dev/null bs=1048576 count=10000 10000+0 records in 10000+0 records out 10485760000 bytes transferred in 44.887239 secs (233602250 bytes/sec) 44.88s real 0.03s user 2.40s sys In comparison: OS: FreeBSD 5.4 RAID: 5 on 6 * 300GB Seagate Controller: Areca 1120 CPU: Dual Opteron 248 RAM: 4Gb /usr/bin/time -h dd if=/dev/da0 of=/dev/null bs=1048576 count=10000 10000+0 records in 10000+0 records out 10485760000 bytes transferred in 81.598938 secs (128503633 bytes/sec) 1m21.60s real 0.00s user 2.69s sys So for the money they HighPoint is nothing to be sneezed at. Of course this is a very crude test not comparing totally like for like. Under load the Areca is quicker and has the flexibility of online capacity expansion and raid level migration but... Steve ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to postmaster@multiplay.co.uk.