Maxtor ATLAS 10K III Manual download pdf (Page 36)

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101

Installation

Quantum Atlas 10K II Ultra 160/m SCSI Hard Disk Drives 3−9

Table 3-1 SCSI ID Selection on Option Connector (68-Pin SCSI Connector Drives)

Configure the drive for remote (external) SCSI ID selection by removing the SCSI

ID jumpers (if present) from the referenced SCSI ID pins. Then connect the leads

from the external selection switch to the referenced pins. Observe the following

guidelines while doing so:

• ID bit 0, at Pin 1, is the Least Significant Bit.

• SCSI ID bits 0, 1, 2, and 3 (pins 1, 3, 5, and 7, respectively) are active LOW

signals. That is, the bit is a 1 if the corresponding remote switch is closed to

ground.

• Use pins 2, 4, 6 and 8 as the associated ground returns for ID bits 0, 1, 2, and 3,

respectively. The ground returns can be used individually, or the ground returns

of all four ID bits can be combined at pin 10.

Jumper Location – Option Connector

SCSI ID Pin Pair 7 / 8 Pin Pair 5 / 6 Pin Pair 3 / 4 Pin Pair 1 / 2

0 0 0 0 0

1 0 0 0 1

2 0 0 1 0

3 0 0 1 1

4 0 1 0 0

5 0 1 0 1

6 0 1 1 0

7 0 1 1 1

8 1 0 0 0

9 1 0 0 1

10 1 0 1 0

11 1 0 1 1

12 1 1 0 0

13 1 1 0 1

14 1 1 1 0

15 1 1 1 1

0 = Jumper Not Installed

1 = Jumper Installed

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 370 371

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