Step 7: Properly configure your RAID arrays

Contributor Hilary Cotter discusses the best RAID configurations for your SQL Server.

Most servers today ship with at least one internal RAID controller, which will allow you to configure a local RAID array.For most database activity, you should configure RAID 5 for your database files, RAID 10 for your transaction logs and perhaps even RAID 0 for tempdb (RAID 0 offers best performance, but no redundancy). If you find that your write I/O activity is more than five times the amount of read I/O activity, consider using RAID 10 for both your database files and your transaction logs.For a better understanding of RAID types, visit

Spec your SQL Server hardware needs


Hilary Cotter has been involved in IT for more than 20 years as a Web and database consultant. Microsoft first awarded Cotter the Microsoft SQL Server MVP award in 2001. Cotter received his bachelor of applied science degree in mechanical engineering from the University of Toronto and studied economics at the University of Calgary and computer science at UC Berkeley. He is the author of a book on SQL Server transactional replication and is currently working on books on merge replication and Microsoft search technologies.
Copyright 2006 TechTarget

This was last published in January 2006

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