Yeah, with no jumpers on A0-A2 your drive is reponding to SCSI ID 7, which
by convention is what Apple used for internal drives. If you attach it as an
external drive to a box with an internal drive, there will be _two_ devices
responding to SCSI ID 7 on the bus. Put a jumper on A0 for SCSI ID 1, A1 for
SCSI ID 2, A2 for SCSI ID 4, or mix'n'match for your favorite binary number.

Regards,
-Steve Byan
<smb@world.std.com>