Apple Macintosh PowerBook 150 - Manual (Page 107)

If you are attaching more than one SCSI device
Make sure that all of these conditions exist:
m an internal terminator in, or an external terminator attached to, the first
device you’re attaching to the computer
m an internal terminator in, or an external terminator attached to, the last
device you’re attaching to the computer
m no other terminators (internal or external) in the chain
If you have too many devices with internal terminators, your Apple-
authorized service provider can remove extra terminators.
SCSI chain configurations are shown in the illustration on the following page.
Connecting cables
1 Shut down your PowerBook and turn off all SCSI devices in the chain.
2 To connect the first device, use an Apple HDI-30 SCSI System Cable.
Attach the smaller end of the cable to the SCSI port (marked with the icon g)
on the PowerBook, and the larger end of the cable to either SCSI port on the
device.
3 To connect the next device, use a SCSI peripheral interface cable.
The connectors on the ends of the cable are the same. Attach one connector
to the available SCSI port on the first device, and the other connector to either
SCSI port on the next device.
WARNING When making SCSI connections, always turn off power to the
computer and all other devices in the chain. If you don’t, you could lose
information and damage your equipment.
99 Connecting Other Equipment to your PowerBook