Operation Manual

Chapter 4 External I/O Connections 35

3. Verify the cable type used to connect external SCSI devices. You must use Fast-20

SCSI cable(s).

Ensure that the total SCSI cable length does not exceed the permissible total SCSI

bus length.

SCSI-2 (Fast Wide SCSI) External Devices

If you connect SCSI-2 (Fast Wide SCSI, 20Mbyte data transfer rate) external devices

to a Netra t 1400/1405 system, follow these cabling and configuration guidelines (as

shown in

FIGURE 4-6) to ensure proper device addressing and operation:

■ If all external mass storage devices use 68-pin connectors, connect all non-Sun

devices to the Netra t 1400/1405 system first and follow them with Sun devices.

Sun devices use auto-termination.

■ If external mass storage devices consist of 68-pin Sun devices and 50-pin devices,

connect the Sun 68-pin devices to the Netra t 1400/1405 system first and

terminate the daisy chain with the 50-pin device and its terminator.

■ The total SCSI bus length for all external SCSI devices is 6.0m (19.7ft).

FIGURE 4-6 Connecting External Mass Storage Devices

Non-Sun device

Sun device

50-pin device

Terminator

Adaptor cable

FL SUN 2

1400

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