Hi, sorry to go back to this issue on the drives. If this is the config you recommend for videoediting and OS X and XP are on each smaller drive, which drive should the PS scratch disk be allocated to? Originally, for photoshop, the 2nd small drive was the scratch drive. Can OS X and PS scratch share the same drive (assuming OS X and PS on XP are not running at the same time)? Or would partition of the 2nd small drive be better - 1 to hold OS X and the other be the PS scratch drive? Sorry if I am asking the obvious!