It sounds it might be the drive (or the power to it). I've never used SCSI so making an assumption that they are similar to IDE drives in that they will spin up when a disk is inserted, even if not connected to the data bus.
Hi
That's what I was thinking, could be an issue with the drive, and looking at the price of SCSI drives I think I will just stick with having a "only" an IDE drive!

Regards
Barry