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Chapter 7 Installing Internal Options
7.9.2 Connecting External SCSI Devices
External SCSI devices with different SCSI IDs are connected in a daisy chain as shown in the following
figure.
Up to two external SCSI devices can be connected.
Notes on Connecting External SCSI Devices
z
Terminal resistor
Install a terminal resistor to the external SCSI device at the end of the daisy chain. Alternatively, use the
auto termination function of the external SCSI device.
Be sure to use the terminal resistor supplied with a SCSI device only on that device.
z
Daisy Chain Connection
Daisy chain connection is impossible between devices with different SCSI interfaces. Use a SCSI Ctrl
U160 separately for connection.
LTO2 library devices cannot be connected in a daisy chain.
table: Types of Terminal Resistor
Connector on optional SCSI
devices
Terminal resistor
Half-pitched 68-pin connector
Supplied with optional SCSI devices
SCSI cable
SCSI card (PG-1281)
SCSI cable
External SCSI option
Server
Terminator
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