You also need to verify that the log LUNs are RAID10 and the data LUNs are RAID5 (typically that is the best performance).
If you're going to put both tempdb mdf files and ldf file on the same raid set, be sure to get RAID10 and not RAID5.
SQL DBA,SQL Server MVP(07, 08, 09) "It's a dog-eat-dog world, and I'm wearing Milk-Bone underwear." "Norm", on "Cheers". Also from "Cheers", from "Carla": "You need to know 3 things about Tortelli men: Tortelli men draw women like flies; Tortelli men treat women like flies; Tortelli men's brains are in their flies".