Question for those who know a bit about RAID on OS X as I'm really not sure myself and need advice. Basically I want to create a striped RAID set consisting of 2 internal 500GB Drives to create one large 1TB Volume. Next, I want to to the same with 2 external drives to create another 1TB Volume. Finally I want to Mirror those two 1TB striped sets for reliability. 1. Is this possible using Disk Utility in OS X? 2. What happens when Leopard comes along and I re-format my boot disk drive, will Leopard continue to see the existing RAID set, or will it essentially break the RAID array?