I realize it is an old thread but I have the same problem and hopefully solved it easily. I've had two PCs networked "forever" (sadly, since HomeGroup, and MSFT WIN chgs seem to precipitate my mapped...

Thank you. Your drivers worked for me. However, searching for a fix I read elsewhere that Marvel does not perform at the max speed allowed and that the Intel SATA 3 (6g) does, so after making sure...