I am looking urgently for some advice. I had my new MacPro 6-core delivered yesterday and am anxious to get going with the fun stuff (Aperture 3 etc) I have been trying to set the 6-core up as follows. It has 4x 2TB internal hard disks and I would like to have them as 2x 4TB striped RAID0, one of which then acts as a mirror of the other.This is possible, right? I didn't install a RAID card but again I know from my old MP that you can still do a RAID set-up. I am a complete amateur in the RAID area but have closely followed the Apple instructions on the support side. Just setting up two of the disks as one hasn't worked: all the steps go fine but at the end the 'create' button remains 'greyed' out. Any ideas, anybody? Ps : I assume that when building these 'combined' disks I lose anything I had already transferred?