Compaq Infortrend manual Terminal Operation

Enter a unique ID for any RAID controller no matter it is configured in a single or dual-controller configuration. The unique ID is necessary for the following:

1.A controller-specific identifier that helps controllers to identify its counterpart in a dual-active configuration.

2.The unique ID is generated into a Fibre channel WWN node name for controllers or RAID systems using Fibre channel host ports. The node name is used to prevent host computers from mis-addressing the storage system during the controller failover/failback processes.

3.MAC addresses for the controller’s Ethernet port that should be taken over by a surviving controller in the event of controller failure.

In redundant mode, configuration data is synchronized between controllers. Host ports on both controllers appear with the same node name but each with a different port name (WWPN).

When a controller fails and a replacement is combined as the Secondary controller, the node name will be passed down to the Secondary controller. The host will not acknowledge any differences so that controller failback is totally transparent.

The unique identifier setting can be accessed from "View and Edit Configuration Parameters" → "Controller Parameters" → "Controller Unique ID."

Terminal Operation 7-40