Just got a new P55A-UD6 and two SATA3 6GB/s drives and would like to do a fresh RAID O and OS installation. Sure I will connect the two drives to SATA connectors "GSATA_6" and "GSATA_7" which are controlled by Marvell chip (for SATA3 6GB/s). Then I go to the BIOS / Integrated Peripherals / GSATA 6_7 Controller and make it "Enabled". Then to GSATA 6_7 Ctrl Mode. Now the question is: in GSATA 6_7 Ctrl Mode, which option should I choose for RAID O setup? It only has "IDE" and "AHCI" but NO "RAID" option??? To cut the long story short, how do I enable the RAID funtion on Marvell 9128 chip?