SQL Server 2005 disk array
What is the best configuration for SQL Server 2005?
From what I've seen so far, recommendations for optimal disk configurations will not change when upgrading to SQL Server 2005 from SQL Server 2000. The article Working with direct attached storage devices: Cost effective drive alignment and RAID configuration
, by SQL Server MVP Bill Wunder, does an excellent job of describing disk considerations for SQL Server 2000.
The only additional piece of advice I can recommend for SQL Server 2005 is to ensure that tempdb is on the fastest disks available. Thanks to new features such as shapshot isolation, tempdb will encounter even greater stress than it does in SQL Server 2000 installations. Test carefully when upgrading and make sure it can handle the extra load.
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This was first published in June 2005