Hardware Raid on Intel DG965OT Motherboard

Ivan Carey ivan at careytech.com.au
Thu Apr 5 00:12:44 UTC 2007

Alexander Anderson wrote:
> Tue, Apr 03, 2007 at 05:22:22 PM, Ivan Carey wrote:
>> Is there hardware support for this Motherboard Intel DG965OT Motherboard 
>> in FreeBSD 6.2 I have read the Hardware notes but am unable to determine 
>> if FreeBSD 6.2 is compatible with Intel DG965OT Motherboard and the on 
>> board Martix Storage Technology
>> I would like to setup a Raid 1
>> http://www.intel.com/products/motherboard/DG965OT/index.htm 
>> <http://www.intel.com/products/motherboard/DG965OT/index.htm>
>> Also are the any concise instruction on how to setup hardware raid 1? I 
>> have searched the net
> 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.
> When you set it up, you first have to create a RAID array. When your
> machine boots, right after (or before?) you see the screen that takes you
> to the BIOS configuration, you'll be prompted to press Ctrl-I (IIRC) and
> you'll be taken to RAID controller configuration screen. It's really
> straightforward how to create a new array.
> Then, when you boot FreeBSD, you should look at dmesg output. Mine looks
> like this:
> 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
> FreeBSD installer asked me what drive I wanted to install it to: ad4, ad6,
> ad8, ad10, or ar0. Of course, I chose ar0.
> (The second on-board RAID controller, Marvell 88SE6145, seems to be
> unsupported under FreeBSD 6.2, unfortunately. It gave me quite some
> trouble. But that's another topic.)
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Alexander thanks for the info,
How do you know when a drive has failed and how do you rebuild the 
array, Is this done in the bios or in FreeBSD?


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