Asus AP100 Manual de referencia de hardware - Página 24

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II. System Components

Ultra2 SCSI Disk Drive

The Ultra2 SCSI disk drive has separate signal and power connections. The

power connector is the same as standard hard disk drive power. The signal

cable is different. For proper signal stability in Ultra2 speeds, a special twisted

ribbon cable must be used. Each two wires are twisted for signal shielding

like that of high speed (e.g. category 5) LAN cabling.

Ultra2 SCSI hard disk drive connections

In order to prevent SCSI signal loss, the provided external SCSI terminator

must be used at the end of the 68pin SCSI cable. 50 pin SCSI cables may

also use terminators but usually use termination jumpers on the device it-

self. Currently Wide-SCSI devices have termination jumpers but Ultra2

devices do not. Some manufacturers ship SCSI devices with the terminator

set, others do not. All termination jumpers must be removed when using the

external SCSI terminator.

Ultra2 SCSI ribbon cable terminator

AP100 Hardware Reference Guide

Red stripe of signal cable

Red stripe of power cable