Validate WWNN?

The front panel prompts you to validate the WWNN when the worldwide node name (WWNN) that is stored in the service controller (the panel WWNN) does not match the WWNN that is backed up on the SAN Volume Controller disk (the disk WWNN).

Typically, this panel is displayed when the service controller has been replaced. The SAN Volume Controller uses the WWNN that is stored on the service controller. Usually, when the service controller is replaced, you modify the WWNN that is stored on it to match the WWNN on the service controller that it replaced. By doing this, the node maintains its WWNN address, and you do not need to modify the SAN zoning or host configurations. The WWNN that is stored on disk is the same that was stored on the old service controller.

After it is in this mode, the front panel display will not revert to its normal displays, such as node or cluster options or operational status, until the WWNN is validated. Navigate the Validate WWNN option (shown in Figure 1) to choose which WWNN that you want to use.

Figure 1. Validate WWNN? navigation

This figure shows the sequence of the Validate WWNN? options on the front-panel display

To choose which stored WWNN that you want this node to use, perform the following steps:

From the Validate WWNN? panel, press and release the select button. The Disk WWNN: panel is displayed and shows the last five digits of the WWNN that is stored on the disk.
To view the WWNN that is stored on the service controller, press and release the right button. The Panel WWNN: panel is displayed and shows the last five numbers of the WWNN that is stored on the service controller.
Determine which WWNN that you want to use.
1. To use the WWNN that is stored on the disk, perform the following steps:
  1. From the Disk WWNN: panel, press and release the down button. The Use Disk WWNN? panel is displayed.
  2. Press and release the select button.
2. To use the WWNN that is stored on the service controller, perform the following steps:
  1. From the Panel WWNN: panel, press and release the down button. The Use Panel WWNN? panel is displayed.
  2. Press and release the select button.

The node is now using the selected WWNN. The Node WWNN: panel is displayed and shows the last five numbers of the WWNN that you selected.

If neither WWNN that is stored on the service controller panel or on the disk is suitable, select either WWNN choice and then use the edit WWNN option that is available from the Node WWNN: panel to change the WWNN to the correct value.