SQLCAT, has published a whitepaper Disk Partition Alignment Best Practices for SQL Server for configuring optimal disk performance.

Follow up:

• SQLCAT: http://sqlcat.com/whitepapers/archive/2009/05/11/disk-partition-alignment-best-practices-for-sql-server.aspx
• MSDN: http://msdn.microsoft.com/en-us/library/dd758814.aspx

CU tosc