I'm using a Corsair 120 GB Force SSD, a MCE OptiBay Kit, and a Hitachi 500 GB 7200 rpm drive. Everything works great when the SSD is in the hard drive bay, and the Hitachi is in the OptiBay. I'd prefer to swap the arrangement so the Hitachi can be protected by the sudden motion sensor, but when the SSD is in the OptiBay OS X won't recognize it. I've tried booting from the install disc to use Disk Utility, but it only shows the Hitachi drive as if the SSD isn't in the machine. I've throughly checked the installation; it appears correct, and as I said everything works fine with the drives swapped. I've also tried resetting the PRAM and the SMC, per the instructions in Apple's KB. Any ideas as to how to fix it?