I guess I assumed that leaving the hard drive or CD drive in would terminate it, especially since the CD drive (AppleCD 300 Plus) appears to have a jumper in the "Term Power" spot. However that may mean something totally different as the similarly labelled "TPR" jumper on the adapter doesn't change anything either. So if it's a termination issue, I might need one of those passive terminators. Where would I find one? I was just surfing eBay and see some 68 pin ones, and a few 50-pin active terminators, but none that are 50-pin and let me pass through to a drive. Obviously I don't want to just terminate one of the ends because then I lose the ability to have both CD and a hard drive at the same time. Unless I'm misunderstanding and that's exactly what I have do. I'll admit I'm not completely sure as I don't have much SCSI experience at all.