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1. Connect the storage expansion enclosures to drive loop A as follows:
a. Starting with the first storage expansion enclosure, connect a fiber-optic
cable from the In port on the left ESM to the Out port on the left ESM in the
second enclosure.
Leave the Out port on the left ESM in the first enclosure unoccupied.
b. Connect the In port on the left ESM in the second enclosure to the Out port
on the left ESM in the third enclosure.
c. Connect the In port on the left ESM in the third enclosure to port 1A on the
ESM A in the fourth enclosure.
d. Connect port 1B on the ESM A in the fourth enclosure to port 1A on the
ESM A in the fifth enclosure.
e. Connect port 1B on the ESM A in the fifth enclosure to the Out port on the
left ESM in the sixth enclosure.
f. Connect the In port on the left ESM in the sixth enclosure to the Out port on
the left ESM in the seventh enclosure.
2. Connect the storage expansion enclosures to drive loop B as follows:
a. Starting with the first storage expansion enclosure, connect a fiber-optic
cable from the In port on the right ESM to the Out port on the right ESM in
the second enclosure.
b. Connect the In port on the right ESM in the second enclosure to the Out
port on the right ESM in the third enclosure.
c. Connect the In port on the right ESM in the third enclosure to port 1B on the
ESM B in the fourth enclosure.
d. Connect port 1A on the ESM B in the fourth enclosure to port 1B on the
ESM B in the fifth enclosure.
e. Connect port 1A on the ESM B in the fifth enclosure to the Out port on the
right ESM in the sixth enclosure.
f. Connect the In port on the right ESM in the sixth enclosure to the Out port
on the right ESM in the seventh enclosure.
Leave the In port on the right ESM in the last enclosure unoccupied.
3. Connect drive loop A to the DS4500 Storage Subsystem as follows:
v Connect the In port on the left ESM in the seventh enclosure to the Out
(upper) port on drive mini hub 4 on the DS4500.
Leave the In (lower) port on drive mini hub 4 unoccupied.
4.
Connect drive loop B to the DS4500 Storage Subsystem as follows:
v Connect the Out port on the right ESM in the first enclosure to the In (lower)
port on drive mini hub 2 on the DS4500.
Leave the Out (upper) port on drive mini hub 2 unoccupied.
Storage expansion enclosure ID settings
This section provides information about storage expansion enclosure settings. For
additional detail, refer to the Installation, User’s, and Maintenance Guide for your
storage expansion enclosure.
Fibre channel loop and ID settings
When you install a hard disk drive in the storage expansion enclosure, the drive
tray plugs into a printed circuit board called the midplane. The midplane sets the
fibre channel loop ID automatically, based on the enclosure ID switch setting and
the physical location (bay) of the hard disk drive.
102 IBM TotalStorage DS4500 Fibre Channel Storage Subsystem: Installation, User’s, and Maintenance Guide