Installation guide

Chapter 4 Installing Mass Storage Devices
44
Primary and Secondary Cages Duplexed
Primary Cage
Duplex Board
SCSI A
to Top Half
SCSI B
to Bottom Half
SCSI A
SCSI B
Duplex Board
Secondary Cage
Channel C
to Top Half
Channel D
to Bottom Half
I/O Board shown with a DAC in
PCI slot 5 (Channel X) and 6 (Channel Y)
D
C
Figure 4-8. Both Cages Duplexed
1
1
012012
AA
A
BBB
2
2
3
3
4
4
5
5
6
6
Bus B Bus A
Center Line
1
1
0
2
0
2
A
A
B
B
2
3
2
4
3
5
6
4
Bus B
Bus A
Center Line
Slot Number
Disk Drive
SCSI Device ID
SCSI Bus ID
1
1
02012
AAABB
2
2
Bus B Bus A
Center Line
34
3
5
4
6
5
1
1
012012
CCCD
D
2
2
3
3
4
4
5
5
6
6
Bus D Bus C
Center Line
1
1
0
2
0
2
C
CD
D
2
3
2
4
3
5
6
4
Bus C
Center Line
1
1
0
2
012
CCCDD
2
2
Bus D
Bus C
Center Line
34
3
5
4
6
5
Primary
Cage
Secondary
Cage
D
Slot Number
Disk Drive
SCSI Device ID
SCSI Bus ID
Bus D
Load
Figure 4-9. Duplex Drive Configurations