I've got a DEC RW500 optical disk libray that I'm confused about.... The machine powers up, passes self tests, loads and unloads media, but I can't get the scsi controller in my peecee to recognize any media in it. I've tried the original drive that came in the box, as well as an HP versioned drive, as well as DEC labelled media, HP labelled media, and some other brands. It seems like the drive starts to spin the media, but it stops after a few seconds.... Is there a trick to this, or do I have a couple of dead drives?