Failing back to the production site

You can perform a failback using a disaster recovery plan only if the destination volumes are resynchronized in the reverse direction to the original production storage resources. You can also create a new disaster recovery plan to fail over the Exchange storage resources to the production site.

Before you begin

About this task

Steps

1. Launch the Replication Management Console.
2. Click Business Continuance (DR : PROD).
3. Select the destination volumes.

   If there are no SnapMirror relationships, create new destination volumes through storage system commands, and initialize it.

4. Click Sync to resynchronize the destination volumes in the reverse direction, if they are broken.
5. Create a final backup of all the Storage Groups at the Business Continuance site with a destination volume update of all LUNs.
6. Connect to the production host.
7. Select the disaster recovery plan.
8. In the Actions pane, click Execute.
9. In the dialog box that appears, either click Yes to validate the Business Continuance plan before executing it, or continue without validation.
10. In the SnapManager - Business Continuance window, click Next.
11. This step is applicable only for Exchange Server 2003 or Exchange Server 2007 clustered configuration, to ensure that the Clustered Mailbox Server, or Exchange Virtual Server is not running. In the Business Continuance Plan Details window that appears, ensure that the Exchange Instance check box is selected, to verify that the Exchange instance is running.
12. In the Business Continuance Plan Details window, click Next.

    If the Exchange instance is not running, SnapManager displays a message that the network name is not alive, along with the complete error details. If the Exchange instance is running, SnapManager displays two options, one to take the Exchange resources offline as part of failover, and the other to exit the wizard, to take the Exchange resources offline, and then relaunch the wizard.

13. In the Choose Business Continuance Recovery Server page, click Next to confirm the recovery server, and the Storage Group that are selected for Business Continuance.
14. In the Choose Business Continuance Activities for Execution page, select the Business Continuance activities that need to be performed during execution.

    If you want to...	Then...
    Ensure that the Business Continuance plan is consistent and valid with respect to the current state of Exchange	Select Business Continuance Server Validation.
    Ensure that the old production cluster is clean, and that there are any not failed disk resources	Select Cleanup of Business Continuance Destination.
    Ensure that all of the Exchange Storage Group instances are offline	Select Offline Exchange Instances.
    Validate the SnapMirror relationships that are a part of the Business Continuance plan	Select quisce and Break SnapMirrors. Any unbroken mirror relationships are broken at this time.
    Connect all the LUNs on the SnapMirror destination volume by using the same drive letters	Select Reconnect Exchange LUNs.
    Create Exchange cluster resources	Select Exchange Instance Recreation. This step is applicable only for Exchange 2007 and Exchange 2003 cluster-cluster configurations. However, the step is skipped automatically for Exchange 2007 stand-alone-to-stand-alone configurations.
    Execute an up-to-the-minute restore operation or mail box rehoming	Select Restore backups. If your configuration is Exchange 2007 and 2003, Cluster-Cluster, SnapManager performs an up-to-the-minute restore operation. If your configuration is Exchange 2007, stand-alone-stand-alone, SnapManager performs an restore operation with the mail box rehoming.

    If there is an error during the process, SnapManager logs the details into reports and Windows Events logs.

15. Click Finish.
16. In the Status page, click Execute to start the operation.
17. Click OK.
18. In the Status page, click Close.

After you finish