When I purchased a SSD, I cloned my Windows 7 mechanical hard drive to the SSD and set the SSD as the boot drive. I need to make the mechanical HD the boot drive again. The BIOS (American Megatrends) lists both drives: SATA Port2 - the SSD drive; SATA Port3 - the mechanical HD. However, the HD does not show up for selecting the boot drive. Does this mean the drive is not bootable? If this is the case, is there a way to make it bootable?