IBM TOTALSTORAGE DS4500 - Manual (Page 11)

For the location of the ports on the storage expansion enclosure ESM board, see Figure 10.
In In Out Out
Storage expansion enclosure
ESM board
2. Connect the same first two storage expansion enclosures to drive loop B, as shown in Figure 11 on
page 12.
Starting with the first storage expansion enclosure, connect a fiber-optic cable from the In port on the
right ESM board to the Out port on the right ESM board in the second (next) storage expansion
enclosure.
Last storage
expansion
enclosure
ESM boards
ESM board
Loop A
Fibre Channel
cable
First storage
expansion
enclosure
Storage
server
In Out
Figure 9. Connecting two storage expansion enclosures into drive loop A
Figure 10. Storage expansion enclosure environmental services module (ESM) board in and out ports
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