From owner-freebsd-questions@FreeBSD.ORG Wed Apr 4 23:02:59 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id E1BC816A403 for ; Wed, 4 Apr 2007 23:02:59 +0000 (UTC) (envelope-from fbsd-questions@mawer.org) Received: from webmail.icp-qv1-irony3.iinet.net.au (webmail.icp-qv1-irony3.iinet.net.au [203.59.1.108]) by mx1.freebsd.org (Postfix) with ESMTP id 63E8F13C455 for ; Wed, 4 Apr 2007 23:02:59 +0000 (UTC) (envelope-from fbsd-questions@mawer.org) Received: from 203-206-173-235.perm.iinet.net.au (HELO [10.24.1.1]) ([203.206.173.235]) by webmail.icp-qv1-irony3.iinet.net.au with ESMTP; 05 Apr 2007 06:52:43 +0800 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgAAAHTIE0bLzq3r/2dsb2JhbAAN X-IronPort-AV: i="4.14,372,1170604800"; d="scan'208"; a="1141990220:sNHT34947768" Message-ID: <46142C3C.8070701@mawer.org> Date: Thu, 05 Apr 2007 08:52:44 +1000 From: Antony Mawer User-Agent: Thunderbird 1.5.0.10 (Windows/20070221) MIME-Version: 1.0 To: Alexander Anderson References: <461200AE.4010100@careytech.com.au> <20070404113009.GA93829@upful.org> In-Reply-To: <20070404113009.GA93829@upful.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: Hardware Raid on Intel DG965OT Motherboard 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: Wed, 04 Apr 2007 23:03:00 -0000 On 4/04/2007 9:30 PM, Alexander Anderson wrote: > I have Intel D975XBX2 with two on-board SATA RAID controllers: one is Intel > Matrix and the other is Marvell storage. I have FreeBSD 6.2 with RAID-5 > using Intel Matrix Storage. It seems to work fine. ... > ad4: 305245MB at ata2-master SATA150 > ad6: 305245MB at ata3-master SATA150 > ad8: 305245MB at ata4-master SATA150 > ad10: 305245MB at ata5-master SATA150 > ar0: 915729MB status: READY > ar0: disk0 READY using ad4 at ata2-master > ar0: disk1 READY using ad8 at ata4-master > ar0: disk2 READY using ad6 at ata3-master > ar0: disk3 READY using ad10 at ata5-master You may want to re-think that option... according to the ataraid(4) man page, RAID5 is not functional (ie. you have about as much data safety as a RAID0 stripe set does): > CAVEATS > RAID5 is not supported at this time. Code exists, but it neither uses > nor maintains parity information. One drive failure and you will be in for a whole world of hurt... --Antony