I've an early 2008 Mac Pro which I have added a couple of additional SATA drives to; both are Western Digital Raptor drives (a 75GB and a 150GB model). I've successfully used the 75GB as a BootCamp volume for Windows XP, and it is my intention to use the 150GB one as my main OS X boot drive. I used SuperDuper! to copy the original boot drive over to the 150GB Raptor, which copied successfully. Unfortunately, this new volume doesn't appear in the list of bootable volumes in the Startup Disk preference panel. If I restart and hold the Option key down, it is listed and I can boot from it, but I'm worried about erasing the original drive whilst I can't manually select the new drive as my boot volume in the preference panel. For what it's worth, Disk Utility reports the new volume as bootable. Can anybody suggest any remedies as to how to make the new volume appear in the list, so that I can recover the older drive to use for storage?