Compaq StorageWorks HSG60 ACS Solution Software V8.6 for Compaq Tru64 UNIX Installation and Configuration Guide

Planning a Subsystem 1–13
■ If a controller pair is in transparent failover mode and the port 1 link is separate from
the port 2 link (that is, ports 1 of both controllers are on one loop or fabric, and port 2
of both controllers are on another), each adapter will have one connection, as shown in
Figure 1–7.
■ If a controller pair is in transparent failover mode and port 1 and port 2 are on the same
link (that is, all ports are on the same loop or fabric), each adapter will have two
connections, as shown in Figure 1–8.
■ If a controller pair is in multiple-bus failover mode, each adapter has two connections,
as shown in Figure 1–9.
Figure 1–7. Connections in separate-link, transparent failover mode configurations
CXO7081B
Host
port 1
active
Host
port 2
active
D100 D101 D120D0 D1
Switch or hub Switch or hub
Controller A
Controller B
Connection
AQUA1A1
Connection
BLACK1B2
Connection
BROWN1B2
Host
port 2
standby
Host
port 1
standby
Host 1
"AQUA"
FCA1
Host 2
"BLACK"
FCA1 FCA1
Host 3
"BROWN"
NOTE: FCA = Fibre Channel Adapter