I am planning to run 4x WoW on a single machine (slave machine) while running a single instance on my main machine.

I have 2x 250GB SATA2 HDD in my slave machine with a motherboard capable of RAID. So I am looking at a few options on my slave machine, RAID0, RAID1, 2x WoW per non-raided disk or a single WoW instance.

All 4 classes will be different. How limiting is the single instance?

Anyone have any performance results from raided disks?