I've got an odd problem. I had a pair of 120GB SSDs in my cMP 1,1, and recently upgraded to a cMP 5,1. One of the SSDs works just fine in in cMP 5,1, but the other isn't recognized by Disk Utility. To further make it crazy, if I throw it into an USB enclosure, it is recognized. It is recognized by the OS X boot selector, but if I try to boot to it, I get the circle/hash on the screen, and the cMP 5,1 just boots to another slot. I've tried it in all four slots, and the result is the same. I hooked it up to a windows box and did a DISKPART, but I still have the same issue. GUID and MBR both result in the same thing. I've also reset the SMC and PRAM. Any suggestions?