
RAID Array 3000 Controller Shelf
Figure 3–12  Controller/ Three Device Expansion Shelf Cabling Diagram
DEVICE EXPANSION SHELF # 3
| P/S | P/S | 
| A | B | 
| 
 | 
 | 
DEVICE EXPANSION SHELF # 2
| P/S | P/S | ||
| A | 
 | B | |
| 
 | 
 | 
 | 
 | 
| 
 | 
 | 
 | 
 | 
| 
 | 
 | 
 | 
 | 
DEVICE EXPANSION SHELF # 1
| P/S | P/S | 
| A | B | 
Personality I/O
Module
Personality I/O
Module
Personality I/O
Module
TRI
Link 
OFF ON
1

2

3

4


SCSI Bus
Termination Switch (S4)
OFF ON 1 
 2
 2 
 3
 3 
 4
 4 
 SCSI Bus Termination Switch (S4)
 SCSI Bus Termination Switch (S4)
OFF ON
1



2


3

4

SCSI Bus
Termination Switch (S4)
ON
OFF 





 1 2 3 4 5 6 7
 1 2 3 4 5 6 7
SCSI Bus Address
Switch (S3)
ON
OFF 






 1 2 3 4 5 6 7
 1 2 3 4 5 6 7
SCSI Bus Address
Switch (S3)
ON
OFF 






 1 2 3 4 5 6 7
 1 2 3 4 5 6 7
SCSI Bus Address
Switch (S3)
CONTROLLER SHELF
| P/S | P/S | 
| A | B | 
 SCSI Cable
 SCSI Cable
| Host 0 I/O | Device | ||||
| 
 | Module | 
 | I/O Module | ||
| 
 | CTR 0 | 
 | 
 | 
 | 
 | 
Serial Control
Cable
 Maintenance
 Maintenance
PC
SCSI Cable
 To Host System
To Host System