IBM System Storage DS4000, Hardware Manual

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Chapter 3. IBM System Storage DS4000 and DS5000 hardware
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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.
Figure 3-68 DS5020: All connectors
Controller A
Serial
port Ethernet
ports Dual-ported
drive channel Fibre Channel
host channels
Enclosure ID
Controller B
iSCSI
host
channels
Serial
port Ethernet
ports Dual-ported
drive channel Fibre Channel
host channels
Enclosure ID
iSCSI
host
channels
Power-fan
canister Controller
canister