Infortrend RAID Controller Manual

A Controller Unique Identifier is required for operation with the
Redundant controller configuration. The controller will
automatically notify users to enter a unique identifier when the first
logical drive is created in a dual-controller system.
The unique identifier will be used to generate a Fibre channel "node
name" (WWNN). The node name is device-unique and comprised of
information such as the IEEE company ID and this user-configurable
identifier as the last two bytes.
In redundant mode, configuration data is continuously synchronized
between controllers. Host ports on both controllers appear with the
identical node name and each with a different port name (WWPN).
When a controller fails and a replacement is combined, the node
name will be passed down to the replacement, making the host
unaware of controller replacement so that controller failback is totally
transparent.
Choose “View and Edit Peripheral Devices,” “Set Peripheral Device
Entry," then enable the "Redundant Controller" configuration. You
will be requested to enter a value for the “Controller Unique
Identifier.” Enter any number from 1 to 65535 and press [ENTER].
The identifier selection box will prompt automatically. The value you
enter MUST be different for each controller.
The unique identifier can also be accessed from "View and Edit
Configuration Parameters"� "Controller Parameters"� "Controller
Unique ID."
Controller Communications Over Fibre Loops
Fibre Operation 9-13