Dual Controllers, One Enclosure, Single Chain - Dell SC8000 Deployment Manual

Chapter 3 Connect the Back End

Dual Controllers, One Enclosure, Single Chain

This illustration shows two SC8000 controllers cabled to one SAS enclosure in a single
chain.
Note: In a single‐chain configuration, use SAS ports 2 (initiator) and 4 (target) to
create a redundant IPC connection. When you configure these ports using the IO
port wizard, set the port Purpose to Unknown.
Controller A
Controller B
Enclosure
Figure 67. Dual SC8000 Controllers, One Enclosure, One Chain
Path
IPC
Chain 1: A Side
Chain 1: B Side
68
3 2
4 1
3 2
4 1
A B
A B
Connections
1 Controller A: slot 6, port 2 → Controller B: slot 6, port 4.
2 Controller B: slot 6, port 2 → Controller A: slot 6, port 4.
1 Controller A: slot 6, port 1 → Enclosure: top EMM, port A.
2 Enclosure: top EMM, port B → Controller B: slot 6, port 3.
1 Controller B: slot 6, port 1 → Enclosure: bottom EMM, port A.
2 Enclosure: bottom EMM, port B → Controller A: slot 6, port 3.
Storage Center SC8000 Controller Deployment Guide