I have two Seagate Barracuda 7200.10, 8MB 80GB drives setup in raid 1, and 120GB used in external USB for storage. I was given a Seagate Barracuda 7200.10, 250GB 7200 RPM 16MB Cache SATA 3.0Gb Hard Drive. How and what would be the better configuration to max the efficiency of these three drives? Not a gamer and MB has SATA 3.