Ds5020 Storage Subsystem Additional Connections - IBM Midrange System DS4000 Series Hardware Manual

Each enclosure service module (ESM) only has one pair of ports, labelled 1A and 1B, that
can be used to connect FC cables. The other pair of ports is reserved for future use. Proceed
as follows:
1. Start with the first expansion enclosure, which we attach to drive channel pair #1. Cable
controller A, drive port 2 to the port (1B) on the left ESM of the first EXP.
2. Cable the port (1A) of the left ESM on the first EXP to the port (1B) on the left ESM of the
second EXP.
3. Cable the port (1A) on the left ESM of the second EXP to the port (1B) on the left ESM of
the third EXP.
4. Cable the port (1B) on the right ESM of the first EXP to the port (1A) on the right ESM of
the second EXP.
5. Cable the port (1B) on the right ESM of the second EXP to the port (1A) on the right ESM
of the third EXP.
6. Cable controller B, drive port 1 to the port (1B) on the right ESM of the third EXP located
on the first drive channel pair. This is the last step of the first drive channel pair.
Repeat steps 1–6 (using the next drive-side channel pair ports) for the second drive channel
pairs (three EXPs each).

3.5.9 DS5020 storage subsystem additional connections

The DS5020 storage subsystem has various kinds of connectors, as shown in Figure 3-68.
Controller A
Figure 3-68 DS5020: All connectors
Serial Ethernet Dual-ported
port ports drive channel
Power-fan Fibre Channel
Enclosure ID
canister host channels
Chapter 3. IBM System Storage DS4000 and DS5000 hardware
iSCSI
host Fibre Channel
Enclosure ID
channels host channels
iSCSI
host Controller Dual-ported
channels canister drive channel
Controller B
Ethernet Serial
ports port
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