Installation guide

External RAID Controller Operation Overview
4-62 GAM Client v3.00 and WSAM User’s Manual
Figure 4-51. A Host to LUN Mapping Scenario
Selecting the Topology
Host to LUN mapping provides the user with four possible dual-active
controller configuration topologies:
• Inactive Port—Controller 0 port 0 and controller 1 port 1 are active.
During failover, the inactive port on the partner takes over for the active
port on the failed controller. Supported on all products with two host
Fibre ports.
• Master/Slave—Both ports on controller 0 are active. During failover,
controller 1 assumes control.
• MultiPort—All ports are active. This topology is supported on all Fibre
attached products running Firmware v6.0 or above. Note that this
topology does not provide transparent failover/failback and requires an
alternate path driver in the host.