IBM Netfinity FAStT500, Installation Manual

Page: 49 / 83

Chapter 2. Connecting the controller unit to the loop 33
Connecting drive cables to the controller unit
Use the following procedure to connect a redundant drive loop to the controller unit. You
will need two Fiber Channel interface cables for each redundant pair of loops (for
example, Loop A and Loop B) that you are connecting to the controller unit.
1 Connect drive Loop A to the controller unit, as shown in Figure 21 .
Starting with the last drive enclosure in Loop A, cable the In port on the left ESM
board to the Out (upper) port on drive mini-hub 4 on the controller unit.
Leave the In port on the right ESM board on the last drive enclosure and the In (lower)
connector on drive mini-hub 4 unoccupied.
2 Connect drive Loop B to the controller unit, as shown in Figure 21 .
Starting with the first drive enclosure in the loop, cable the Out port on the right ESM
board to the In (lower) port on drive mini-hub 3.
Leave the Out port on the left ESM board and the Out (upper) port on drive
mini-hub 3 unoccupied.
To connect a second redundant drive enclosure group to the controller unit, continue
with
Step 3 on page 34 ; otherwise, go to "Connecting hosts directly to the controller
unit" on page 35 .
Figure 21. Cabling redundant drive enclosure loops to the controller unit
Loop A interface cables
Step 1: Connect drive Loop A
to the controller unit.
Loop B interface cables
Step 2: Connect drive Loop B
to the controller unit.
Out port on drive
mini-hub 4
In port on drive
mini-hub 3