Date: Wed, 14 Feb 2007 16:34:18 -0600 From: Derek Ragona <derek@computinginnovations.com> To: "Dak Ghatikachalam" <dghatikachalam@gmail.com>, "FreeBSD - Questions" <freebsd-questions@freebsd.org> Subject: Re: RAID 10-LUN Question Message-ID: <6.0.0.22.2.20070214161344.0278ad60@mail.computinginnovations.com> In-Reply-To: <ba29b9b40702141254v4ca8e5c9n21ee1083781c37dc@mail.gmail.co m> References: <ba29b9b40702141254v4ca8e5c9n21ee1083781c37dc@mail.gmail.com>
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RAID 10 uses even numbered drive sets, usually in 4's, so 4 drives, 8
drives, 12 drives, etc. Depending on how 24/7 self-managed you want the
array, you should plan for at least 2 hot spare drives for fail over.
So in your setup you could have one logical array made up of 12 drives,
with 2 spares, and one left for the OS. One consideration in striping is
the stripe size. Stripe size effects performance but also storage
efficiency. So you want to balance those factors in choosing a stripe size.
One last issue, is make sure you have enough cache on the RAID controller.
-Derek
At 02:54 PM 2/14/2007, Dak Ghatikachalam wrote:
>Hi Freebsd
>
>
>We have DELL/EMC CX-300 storage array hardware , Navisphere. , which consist
>of 15 Disks 320GB, I am planning to use this for Oracle( Linux) + SQL
>server(M$) purpose.
>
>We need to get that redundancy using RAID 10 and striple for the best
>performance.
>
>My thoughts are take most even number of possible disks( leaving private
>system partition area) and create the raid groups and kick a separate LUNS
>for MSSQL purpose.
>
>With this hardware config, Do you have any suggestion on getting the best
>performance and redundancy in place
>
>Thanks
>Dak
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