Exp710/Exp100 Port Labels - IBM DS4800 User, Installation And Maintenance Manual

3. The following steps describe the cabling sequence for connecting at least two
storage expansion enclosures to a DS4800 using the preferred topologies
identified in "DS4800 Storage Subsystem drive cabling topologies" on page 69.
Note: If you are not using the preferred cabling topology, or if you are only
connecting one storage expansion enclosure to the DS4800, your cabling
sequence will differ from the following steps.
For EXP710 and EXP100 storage expansion enclosure connections:
Perform the following steps to cable EXP100/EXP710 storage expansion
enclosures to each other and to the DS4800. You can match the connections
described these steps with the cabling diagram (provided in "DS4800 Storage
Subsystem drive cabling topologies" on page 69) that most closely matches
your configuration. Figure 43 shows the name of the ESM ports in the
EXP100/EXP710 storage expansion enclosures.
Figure 43. EXP710/EXP100 port labels
a. Start with the first storage expansion enclosure from the group of drive
expansion enclosures that will be cabled together behind a drive port of a
drive channel. Connect the In port on the left ESM board to the Out port on
the left ESM board of the second (next) enclosure. (See callout 2 in
Figure 44 on page 64.)
b. On the first storage expansion enclosure from the group of drive expansion
enclosures, connect the In port on the right ESM board to the Out port on
the right ESM board of the second (next) enclosure. (See callout 6 in
Figure 44 on page 64.)
c. If you are cabling more storage expansion enclosures to this group, repeat
steps 3a and 3b for all enclosures except the final enclosure in the loop,
starting with the second enclosure. (See callouts 3 and 4 for the left ESM
connections and callouts 7 and 8 for the right ESM connections in Figure 44
on page 64.)
Chapter 3. Cabling the storage subsystem
63