Date: Thu, 05 Apr 2007 08:52:44 +1000 From: Antony Mawer <fbsd-questions@mawer.org> To: Alexander Anderson <a.anderson@utoronto.ca> Cc: freebsd-questions@freebsd.org Subject: Re: Hardware Raid on Intel DG965OT Motherboard Message-ID: <46142C3C.8070701@mawer.org> In-Reply-To: <20070404113009.GA93829@upful.org> References: <461200AE.4010100@careytech.com.au> <20070404113009.GA93829@upful.org>
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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 <Seagate ST3320620AS 3.AAJ> at ata2-master SATA150 > ad6: 305245MB <Seagate ST3320620AS 3.AAJ> at ata3-master SATA150 > ad8: 305245MB <Seagate ST3320620AS 3.AAJ> at ata4-master SATA150 > ad10: 305245MB <Seagate ST3320620AS 3.AAJ> at ata5-master SATA150 > ar0: 915729MB <Intel MatrixRAID RAID5 (stripe 64 KB)> 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
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