IBM System Storage Subsystem DS5020 - Manual (Page 101)

One DS5020 and two EXP520 storage expansion enclosures
Figure 47 shows the cabling scheme for one DS5020 storage subsystem and two
EXP520 storage expansion enclosures behind both ports of a dual-ported drive
channel.
Perform the following steps to create the cabling scheme shown in Figure 47:
1. Connect port 2 of drive channel 1 on the DS5020 to port 1B on the left ESM in
the EXP520 one.
2. Connect port 1B on the right ESM in EXP520 one to port 1 of drive channel 2
on the DS5020.
3. Connect port 1 of drive channel 1 on the DS5020 to port 1B on the left ESM in
EXP520 two.
4. Connect port 1B on the right ESM in EXP520 two to port 2 of drive channel 2
on the DS5020.
1A 1B
DS5020
Port 2, drive channel 1
1A 1B
1A 1B
Port 1, drive channel 1
Port 1, drive channel 2
Port 2, drive channel 2
1A 1B
EXP520 one
EXP520 two
Figure 47. One DS5020 and two EXP520 storage expansion enclosures behind a pair of
DS5020 drive ports
Chapter 3. Cabling the storage subsystem 71