SQL Server: One 12-drive RAID-10 array or 2 arrays of 8-drives and 4-drives

Posted by ben on Server Fault See other posts from Server Fault or by ben
Published on 2011-11-23T19:36:05Z Indexed on 2011/11/24 10:01 UTC
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Filed under:

sql-server

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Performance

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raid

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disk-performance

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raid10

Setting up a box for SQL Server 2008, which would give the best performance (heavy OLTP)? The more drives in a RAID-10 array the better performance, but will losing 4 drives to dedicate them to the transaction logs give us more performance.

12-drives in RAID-10 plus one hot spare.

OR

8-drives in RAID-10 for database and 4-drives RAID-10 for transaction logs plus 2 hot spares (one for each array).

We have 14-drive slots to work with and it's an older PowerVault that doesn't support global hot spares.

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