Compaq HSZ80 manual 56Creating Storagesets

3–56Creating Storagesets

■When you incorporate a spare into a storageset that you initialized with the INITIALIZE SAVE_CONFIGURATION command, the controller reserves space on the spare for configuration information. The controller updates this information when the configuration changes.

■To enable SAVE_CONFIGURATION on a storageset containing user data, you must back up the data, re-initialize the storageset, and restore the user data.

■If you previously configured storagesets with the SAVE_CONFIGURATION option, you do not need to initialize them again after you reconfigure your devices with a new controller. The storageset retains the option until it is re- initialized, even if the controller is replaced or the storageset is moved to a new subsystem.

■When you replace a controller, make sure the replacement controller does not contain any configuration data. If the controller is not new, initialize it with the SET THIS_CONTROLLER INITIAL_CONFIGURATION command. If you do not take this precaution, you can lose configuration data if nonvolatile memory changes.

Saving Configuration Information in Dual-Redundant

Controller Configurations

If you decide to use SAVE_CONFIGURATION in a dual-redundant configuration, keep these points in mind:

■The controller-unique data for both controllers is saved.

■The restore feature (holding in port button 6 and pressing the reset button on the controller’s operator control panel) will not function in a dual-redundant controller configuration. If the saved configuration was for a dual-redundant controller configuration, the data will be restored to a single controller and that controller will be set to NOFAILOVER. You must use the SET FAILOVER COPY command to restore the configuration information to the other controller.