I got late 2011 15" MBP 8,2 where in system info both Sata busses read Intel 6, but if I use Sata III SSD in Optibay it either won't read at all, or it will but hangs, is slow etc. I am using OWC data doubler also, but that doesn't seem to help. When I put my data III SSD in primary bay and stock HDD (Sata II) in Optibay, it works. Also, Superdrive works in Optibay without problem. You think new superdrive data cable would help? I kinda doubt since my superdrive and stock HDD work without issues. At this point, I am trying to run bootcamp on the stock HDD in Optibay. While I BARELY got it to work, I cannot instal ATI drivers ... so my screen has cut off edges at full 1080 resolution. if Im using 1440x900, screen is filled edge to edge, but come on 1440x900 :( I think 2011 model is a miss entirely ... I love 2.5ghz 8mb L3 CPU, really do, with 16gb 1600mhz memory and SSD it chews on anything I throw at it ... but these little things are driving me crazy. I have another Sata III SSD I wanted to put in that...