HP StorageWorks HSG80 ACS Solution Software V8.8 for OpenVMS Installation and Configuration Guide (AA-RV1PA-TE, March 2005)

Planning a Subsystem
30 HSG80 ACS Solution Software V8.8 for OpenVMS Installation and Configuration Guide
— Host Fibre Channel adapter
■ A host can redistribute the I/O load between the controllers.
■ All hosts must have operating system software that supports multiple-bus
failover mode.
Figure 8: Typical multiple-bus configuration
CXO7094B
Host
port 1
active
Host
port 2
active
Host
port 2
active
Host
port 1
active
D100 D101 D120D0 D1 D2
Host 1
"RED"
Controller A
Controller B
All units visible to all ports
FCA1 FCA2
Host 2
"GREY"
FCA1 FCA2
Host 3
"BLUE"
FCA1 FCA2
Switch
or hub
Switch
or hub
NOTE: FCA = Fibre Channel Adapter