I have tried looking around for info on this but haven't found a definitive answer. Can I make a RAID set my startup volume? Any precautions to be wary of? Can I RAID a 30 GB and 40 GB together or do they have to be the same size? Thanks for the info. PS using the Disk Utility software RAID setup in Panther. I am planning to stripe in order to have the two act as one drive.