Quantum 10K II User Manual
Page 36
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