From owner-freebsd-stable@FreeBSD.ORG Sat Sep 9 01:00:53 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 430D916A407; Sat, 9 Sep 2006 01:00:53 +0000 (UTC) (envelope-from markir@paradise.net.nz) Received: from linda-2.paradise.net.nz (linda-2.paradise.net.nz [203.96.152.181]) by mx1.FreeBSD.org (Postfix) with ESMTP id C4E2143D45; Sat, 9 Sep 2006 01:00:52 +0000 (GMT) (envelope-from markir@paradise.net.nz) Received: from smtp-1.paradise.net.nz (tclsnelb1-src-1.paradise.net.nz [203.96.152.172]) by linda-2.paradise.net.nz (Paradise.net.nz) with ESMTP id <0J5A00H21W5E9B@linda-2.paradise.net.nz>; Sat, 09 Sep 2006 13:00:50 +1200 (NZST) Received: from [192.168.1.11] (218-101-29-47.dsl.clear.net.nz [218.101.29.47]) by smtp-1.paradise.net.nz (Postfix) with ESMTP id 15FE56FE577; Sat, 09 Sep 2006 13:00:50 +1200 (NZST) Date: Sat, 09 Sep 2006 13:00:45 +1200 From: Mark Kirkwood In-reply-to: <001001c6d327$25dc07c0$b3db87d4@multiplay.co.uk> To: Steven Hartland Message-id: <4502123D.705@paradise.net.nz> MIME-version: 1.0 Content-type: text/plain; format=flowed; charset=ISO-8859-1 Content-transfer-encoding: 7bit User-Agent: Thunderbird 1.5.0.4 (X11/20060704) 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> 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 01:00:53 -0000 Steven Hartland wrote: > I believe you are wrong here and my own performance tests here > backs this up, showing it keeps up with the more expensive areca > in a number of areas notably, providing 180MB/s in sequential > read tests from a 5 disk array. > Steve, 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). Cheers Mark