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Controller B
Controller A
Fibre Channel
host channels
Ethernet
ports
Serial
port
Enclosure ID
Dual-ported
drive channel
Enclosure ID
Ethernet
ports
Serial
port
Dual-ported
drive channel
Fibre Channel
host channels
Figure 2. Back view; controllers with two standard Fibre Channel host expansion channels
Controller B
Controller A
Fibre Channel
host channels
Ethernet
ports
Serial
port
Enclosure ID
Dual-ported
drive channel
Enclosure ID
Ethernet
ports
Serial
port
Dual-ported
drive channel
Fibre Channel
host channels
Figure 3. Back view; controllers with two standard and two optional Fibre Channel host
expansion channels
Controller B
Controller A
Fibre Channel
host channels
Ethernet
ports
Serial
port
Enclosure ID
Dual-ported
drive channel
Enclosure ID
Ethernet
ports
Serial
port
Dual-ported
drive
channel
iSCSI
host
channels
Power-fan
canister
Controller
canister
Fibre Channel
host channels
iSCSI
host
channels
Figure 4. Back view; controllers with two standard Fibre Channel host expansion channels
and two optional iSCSI host expansion channels
10 IBM System Storage DS5020 Storage Subsystem: Installation, User’s, and Maintenance Guide