I bought a Western Digital 1 TB SSD (WD Blue) to speed my Mac Pro up. Curiously enough, if I put it into one of the HD bays the SSD does not show up in Disk Util - it's as if the drive bay is empty. Connect the SSD to one of the optical drive cables though, and it pops right up and works fine. Since I don't really use both optical drives at the same time very much these days having one disconnected so I can use the cable for the SSD isn't a terrible inconvenience. But I'd very much like to do this properly and have the SSD in on of the HD bays. Any ideas why the SSD doesn't show up when it's in the HD bay? Or how I can fix that?