Apple PowerBook (Duo 270C) - Manual (Page 305)

SCSI devices
You can’t turn on the computer after connecting a
SCSI device.
n
SCSI devices must be turned on before the computer itself.
Turn on the SCSI device(s) first, and then turn on the
computer.
The computer doesn’t recognize your SCSI devices.
n
The devices may be off. Check to make sure that they are
plugged in and turned on.
n
If the device is a disk drive, it may need to be initialized before
you can use it. See the instructions that came with the device.
n
The software (driver) needed to run the device may not be
installed in your System Folder. See the instructions that came
with the device.
n
Two or more devices in the SCSI chain may have the same ID
number. Check the ID number of each device to make sure
each one has its own number between 1 and 6, and change
any numbers that are not unique. (If there is a hard disk in
your Duo Dock, that disk has the ID number 1.)
n
When connecting SCSI equipment, it is important to use the
right cables and the correct number and placement of cable
terminators. Check the cables and terminators in the SCSI
chain and make sure that all cables are firmly attached.
n
A PowerBook connected to a Duo MiniDock in sleep cannot
recognize an attached SCSI device. Make sure the SCSI device
is turned on, and then restart the computer.
See Chapter 13 for more information about working with SCSI
devices.
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