HP 7450 Application Software Suite Microsoft Exchange Media LTU

NOTE: Modifications you make to an existing policy are not retroactive. Virtual copies created under a previous policy (whether numeric or expiration-based) retain the policy setting under which they were created.

In addition, when you switch policy type, the system retains the virtual copies that exist at the time of the policy change as follows:

•If you switch from an expiration-based policy to a numeric-based policy, the system does not remove the expiration dates from the existing virtual copies, and these existing virtual copies expire according to their set expiration date.

•If you switch from a numeric-based policy to an expiration-based policy, the system does not apply expiration values to the existing virtual copies. These existing virtual copies continue to reside on the system until you manually delete them or manually set an expiration time for each individual virtual copy.

Numeric-Based Policies

If you specify a numeric-based policy, you can modify the maximum number of virtual copies allowed per storage group.

•By default, Recovery Manager allows you to create a maximum of 10 virtual copies per storage group.

•If a single backup server is managing active and passive nodes, the maximum virtual copy count specified in the policy is enforced on a per-node basis. Therefore, the backup server can contain twice the maximum number of virtual copies.

•The numeric-based policy also enables you to set Recovery Manager to automatically remove the oldest virtual copy for each storage group, after the maximum limit of virtual copies is reached, before creating a new virtual copy. If you do not choose to automatically remove virtual copies when required in order to create a new virtual copy, you must manually delete old virtual copies before you can create new copies.

NOTE: A virtual copy must be unmounted to be removed. If the oldest virtual copy for which retention time has elapsed is mounted (and the maximum limit has been reached), Recovery Manager displays an error message and cancels creation of the new virtual copy.

To create a new virtual copy after the maximum limit of virtual copies is reached, you must unmount the oldest virtual copy.

Expiration-Based Policies

If you choose an expiration-based policy, you can set Recovery Manager to automatically remove virtual copies after a specified period of time has elapsed.

If you specify an expiration time for a remote virtual copy:

•If HP 3PAR Remote Copy Software is set up in asynchronous periodic mode, Recovery Manager sets the expiration time for the remote virtual copy on the backup server only, not for the virtual copy created on the primary server.

•If Remote Copy is set up in synchronous mode, Recovery Manager sets the expiration time for both the virtual copy on the primary server and the remote virtual copy on the backup server.

For more information, see the HP 3PAR Remote Copy Software User’s Guide.

The expiration-based policy option is only available if your HP 3PAR Storage System is running HP 3PAR InForm Operating System Software 2.3.1 or above.

32 Using the Recovery Manager GUI