HP Storage Mirroring V5 Software - Manual (Page 107)

HP StorageWorks Storage Mirroring Application Manager user’s guide 97
To initiate failback, click the Failback button, or select Actions, Failback . The Initiate Failback window will
appear.
On the Initiate Failback window, select the following failback options:
• Restore target data prior to failback —Select this option if you want to restore any modified data from the
target back to the source prior to beginning the failback.
• Enable Compression —Select this option to enable compression of data that is transmitted from the target to
the source. Then, set the level from minimum to maximum compression. The default level is inherited from
the source-to-target connection.
• Prompt prior to failback —Select this option if you want a prompt to appear before failing back.
Click Initiate Failback to begin the failback process. The restoration will begin, and the Protection Status will
display the progress of the restoration. If you selected Prompt prior to failback , when the restoration is complete
a prompt will appear asking if you want to failback. Click Yes to failback to the source.
During restoration, the Application Manager will display the percent complete. Although the Application
Manager does not display restoration statistics, you can view the connection and current status statistics
through the Storage Mirroring Management Console.
Identity failover, failback, and restoration
The following sections describe the manual processes you can use to manage failover, failback, and
restoration. These manual processes are required if you chose to perform Identity failover.
You will be using the Storage Mirroring Management Console, Failover Control Center, and/or Text Client to
manage identity failover and failback. For more information about using Storage Mirroring, refer to the
Storage Mirroring User's Guide.
Initiating a failover
If a failure occurs and the Failover Control Center Time to Fail counter reaches zero (0), a dialog box will
appear in the Failover Control Center requiring user intervention to initiate failover. (If the Failover Control
Center is not open when the failure occurs, the dialog box will appear the next time the Failover Control Center
is opened and you are logged on to the target. See the Storage Mirroring User’s Guide for information on
monitoring a failure.) Acknowledge the manual intervention prompt to start failover.
The post-failover script created earlier will automatically run. During failover, Windows Event Viewer, the
Storage Mirroring log, DFO log, and Storage Mirroring Application Manager logs record the failover events.
When failover is complete, the target will have the application services started, the databases mounted, and
the users pointed to the target.
NOTE: The DFO and Storage Mirroring Application Manager log files are located in the same directory as
the Storage Mirroring Application Manager.
If you are failing over Exchange, after the changes have propagated through your environment, clients can
connect through Outlook ® or Outlook Web Access to receive their e-mail. Users that had Outlook open during
the failure will need to restart the Outlook client (excluding Outlook Web Access clients on a LAN).