Resolve SCSI Error

1. Ensure all external SCSI devices have power.
2. Check that no two devices have the same SCSI ID number (EIIIX is ID 5).
3. Ensure the SCSI cable is 12 feet or less.
4. Verify the last device in the SCSI chain has termination resistors installed.
5. Try a different SCSI cable.

Source: Emulator III XPs — e-mu-emulator-iiixp-operations-manual (manual)