I've been setting up three servers for load testing over the last couple days. It required a complete burn down and reload. Naturally that started with a selection of a disk array level but we wanted to put extra though into our SQL box since the load will be greatest there. Conversations with co-workers pointed me to RAID 10. I brushed up on the all different types of RAID at Wikipedia. All signs seemed to point to RAID 10. Something was missing though; I just needed a little reconfirmation. Jim (our Chief Security Executive) pointed me to this. Ah, it's so much clearer now...