Using The Multi-Mode Scsi Cable - HP xw4000 Service & Reference Manual

Hp xw4000: reference guide
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SCSI Devices
68-pin SCSI controllers require a 53 inch maximum length-twisted pair, LVD cable with
built-in terminator, maximum of 5 drives with a minimum driving spacing of 5.25 inches.
Every SCSI chain or circuit must be terminated (closed) at both ends. Some system boards
have both ends of the SCSI cable connected to, and terminated by, the system board.
Termination can be accomplished in one of several ways:
Use a cable with a built-in terminator.
Use a cable with a terminating resistor plug in the last connector.
Connect a SCSI device with its termination enabled into the last connector.
Connect an external SCSI device with its termination enabled to the external SCSI
connector on the rear panel of the computer.
Turn on all external SCSI devices before turning on the power to the computer. This enables
the SCSI controller to recognize the external devices.

5.2 Using the Multi-Mode SCSI Cable

Some products ship standard with a multi-mode SCSI cable having a terminator 1 on one end.
This cable supports both low voltage differential (LVD) and single ended (SE) devices. One end
of the cable connects to the internal LVD/SE connector on the system board, with the remaining
connectors used on the hard drives.
1
The multi-mode cable included with the computer may differ from the one pictured.
For additional information about installing optional SCSI devices, refer to the documentation
included with the device option kit.
5–2
Service Reference Guide

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