## Servicing the System

## Maintain Devices

The IP Address is a unique number that identifies the device. The worldwide name and Key number are unique identifiers for a specific FRU. Although none of the identifiers are user-maintainable, they help Sun service representatives troubleshoot by enabling them to track the FRUs to specific Sun StorEdge 6020 arrays.

Changing the name of the device changes only the reference to that device within the Storage Automated Diagnostic Environment. It does not affect the access or reference to that device within the operating system. If you change the configuration of a device, you must delete that unwanted device, using the functionality described in To Delete a Device.

The Maintain Devices: Comments window enables you to add more information about a device. For example, you can enter the device's serial numbers, its location, or whether the components are associated with a Sun StorEdge 6920 system device.

You can delete an unwanted device after the device has been removed from the site or if device monitoring is no longer needed.

Note -

Deleting a device from the configuration does not remove access to the device instrumentation in the cache immediately. However, access is cleared the next time you manually run the agent. For detailed information, see Running the Agent Manually.
State information for the deleted device is also maintained until the agent's next run. Therefore, the device can be removed from a configuration and still be viewed in the Topology window and Instrumentation window as a snapshot in time until you take a new Topology snapshot.

If you rename a device and then execute the agent from the command line or from the GUI, the Storage Automated Diagnostic Environment displays a message that the previous device has been removed. The Storage Automated Diagnostic Environment Topology will not display the renamed device, however, until you take a new Topology snapshot.

You can avoid this problem by doing the following:

- Manually add the worldwide name (WWN) into the Storage Automated Diagnostic Environment configuration file, which is located in the /var/opt/SUNWstade/DATA/rasagent.conf file.

Note -

Unless you remove the `SUNWstade` directory or perform a clean ras_install operation, the configuration file remains on the system between upgrades.