If you have 4 72 gig drives and only one Raid controller with the need for high performance and no need for redundacy. I would suggest creating one logical Raid0 drive for the OS and Applications (72 Gig) using only 1 physical drive. You can create a Raid0 drive only using one physical drive. Then I would suggest creating another logical RAID0 drive consisting of the remaning 3 72 gig drives. This would would span the 72 gig drives into one logicial drive consisting of 216 gigs of storage. If you are not concerned with redundancy or backup this would be the best solution for you.