One other thing (not really applicable since you've got a RAID controller): you can use W2k Server with RAID via software. It'll do RAID 0 (striping/spanning - makes two disks look like one), 1 (mirroring - redundant drives with 2 disks), and 5 (strip set with parity - redundant drives with 3 or more disks).

Your RAID controller will do this for you, and faster too, but I thought I'd chime in.

-Zeke
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