RAID-4, as used in the IBM Shark systems, have chunk-level striping (I can't think of the right word now) and a dedicated parity disk to ensure that you have at least one disk with a lot of constant pressure on it.
Jared Still wrote:
Of course, the Sun engineer is saying "our new RAID 5 is just as fast as
RAID 10 because we stripe parity across all disks".
Uh huh. Does he think this is new?
RAID 3 is the version that has a dedicated parity disk IIRC.
RAID 5 has always striped the parity across all disks.
Jared
On Fri, 2003-08-22 at 08:24, DENNIS WILLIAMS wrote:
To whomever posted the link to Gaja's paper Implementing RAID on Oracle - thank you. I previously had printed and passed this article on to my system administrator -- no reaction. But yesterday he was building our new Sun system with all the latest features, and was so excited about the paper that he asked for a second copy to share with his junior sys admin. He stopped building the system to take a day to study Gaja's paper in detail. Of course, the Sun engineer is saying "our new RAID 5 is just as fast as RAID 10 because we stripe parity across all disks". Since this will be an OLTP system, I am planning on an 8K Oracle block size, unless anyone has better information on how to pick a block size. Apparently there are a lot of storage system parameters you can optimize, but they are based on the Oracle block size.
Dennis Williams DBA, 80%OCP, 100% DBA Lifetouch, Inc. [EMAIL PROTECTED]
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