>I bought it used and it came from a G3 >or early G4 and was a card Apple had offered. > >Have not yet tried the CUDA on this machine, hopefully soon. Hi Diane, IMO, I think before doing anything more you need to scour the Apple Knowledge base. I read an article there that specifically said certain older ATTO cards do not work in the newer MDD units. Sorry I don't have the specific Article Number. If you do a search for SCSI, you get about a hundred articles back, and it will be in there somewhere. Best of luck, and so long for now, TOM