I'm on a 9600 with OS8.6. I think the issue is mainly due to me disconnecting that internal SCSI drive. The CDROM is ID3 so it should be terminated when the SCSI HD is disconnected. The Zip drive is ID5 so it should also be terminated. That should be my ticket, but it doesn't seem to clear up the freezing issue.

That's why I mentioned the SCSI Bus 2. 9600s have a SCSI Bus 0 (internal I think) and SCSI Bus 1 (external SCSI). The 9600 seems to augment those two with SCSI Bus 2 when you use a PCI SCSI or SATA/IDE controller. And since I've added a SATA card, the two SATA HDs show up as ID 0 and ID 2, with those IDs being assigned automatically. I'm thinking that those two drives might be interfering with the internal SCSI Bus 0 or something seeing as it's assigning them IDs automatically.