wow that's a nice blu-ray internal drive.
thoughts:
*are the two connectors (power, date) piggybacked off a bigger sata connector? I had problems with that before in having to change sequencing.
*is the sata in the same place on the mobo as the old optic drive?
when you open nemo it's not there in the left pane?
fstab? permissions problems?
spitballing