Using 5+6 for Raid 0 with RaptorX's. Using 2 for ODD. Interestingly I had a Plextor 712SA hooked up to 2 and that is wher I installed my OS from, but ever since then, the drive has been flaky at best. I tried sata1 with the same problems, so I tossed it and bought a new drive. Haven't had any problems with the3 new drive. I plan to add a second ODD in the next week or so. I'll try to report back if I remember.