Applying the FlashCopy Revertible option to existing FlashCopy relationships

Complete this task to apply the FlashCopy^® Revertible option to a FlashCopy relationship with the persistent, change recording, target write inhibit, and no copy options enabled, and the revertible option disabled. It is not valid to apply the FlashCopy Revertible option to a FlashCopy relationship that is already revertible.

You must have previously created a FlashCopy relationship with the persistent, change recording, target write inhibit and no copy options enabled. The FlashCopy Revertible option must be disabled prior to using this task. It is not valid to perform the FlashCopy Revertible task on a FlashCopy relationship that is already revertible.

If a failure occurs on the primary site during a Global Mirror create FlashCopy consistency group process and if that failure results in an inconsistency of the FlashCopy consistency group target volumes, you might be able to correct the inconsistency either by discarding changes or committing changes to the target volumes. You can apply the FlashCopy Revertible option with this DS Storage Manager task in a Global Mirror configuration to modify an existing FlashCopy relationship with the persistent, change recording, target write inhibit, and no copy options enabled. This DS Storage Manager task allows you, under certain conditions during failure recovery, to correct an inconsistency in the FlashCopy consistency group target volumes by discarding or committing the changes to a target volume in a FlashCopy relationship.

The FlashCopy Revertible task restarts an existing FlashCopy volume pair with the revertible option enabled for disaster recovery purposes. The FlashCopy Revertible option remains in effect until the commit changes or discard changes task is performed. Both the commit changes and discard changes tasks disable the FlashCopy revertible option.

Perform the following step to apply the FlashCopy Revertible option to existing FlashCopy relationships:

In the navigation, select Real-time Manager > Copy Services > FlashCopy. A list of FlashCopy volume pairs is displayed. Select one or more FlashCopy pairs on which to perform an action.
Select FlashCopy Revertible from the Select Action drop-down menu. Click Go.
The FlashCopy Revertible: Select common options page is displayed. You must select whether to enable or disable the Permit FlashCopy to occur if target volume is online for host access option. The rest of the options cannot be changed. The Make relationship(s) persistent and Enable change recording options are automatically selected and the Initiate background copy and Establish target on existing Metro Mirror source options are automatically not selected. Click Next.
The FlashCopy Revertible: Select advanced options page is displayed. You can enter a value only in the sequence number field. The rest of the options cannot be changed. The Inhibit writes to source volume, Inhibit writes to target volume and Allow target to be restored to pre-FlashCopy state options are automatically selected. Click Next.
Verify your options, and when you have finished, click Finish to complete the task, or click Cancel to exit without performing the task. The FlashCopy main page is displayed.