AKHandyman - welcome to the "Marvell Sata 6G Issues Club". You are member #183792.

Seriously though, I looked online in other forums too and have found others having issues with the Sata 6G controller. My issue is when I connect two hard drives to each port they both disappear in Windows 7. But they are both shown in the BIOS at start up. When only one hard drive is connected, it is fine and it works. But I guess you're having trouble with just one drive connected to a Sata 6G port?