HP StorageWorks Storage Mirroring user's guide (T2558-96073, February 2008)

7 - 7
Starting failover
When a failover condition is met, you will want to start failover. Additionally, you can start it without a failover condition, as
long as protection is enabled. For example, you may want to force failover when upgrading to a better source server.
To start failover, click
Failover. You can also select Actions, Failover.
If Full-Server Failover determines there is a possibility that the data on the target is incomplete, you will be warned before
failover begins. If you proceed with failover, the state of the source will be unknown until failover is complete. The best case
scenario would be a missing data file, while the worst case scenario would be missing system state data that causes the server
to be unusable or unbootable.
 Shutdown source server if running—If the source is still running, Full-Server Failover Manager can stop it. Although, if
Full-Server Failover Manager cannot communicate with the source, the shutdown command will fail. This option prevents
network conflicts in those cases where the source and target are still both running and communicating, such as a forced
failover.
 Use live data—Select this option to use the data on the target at the time of failover.
 Revert to specified snapshot—Select this option, and then select a snapshot. The data on the target will be reverted to
the selected snapshot. This option will not be available if there are no snapshots on the target or if the target does not
support snapshots. To help you understand what snapshots are available, use the
Type and Status columns. The Status
indicates the state of the connection between the source and target at the time the snapshot was taken. The
Type
information is displayed in the following table.
Click
OK to initiate failover. Monitor the failover percentage as shown in the Protection Status. At the end of failover, the
target will be rebooted automatically. After the reboot, the target will no longer exist, since it will become the source.
Ty p e Description
Scheduled This snapshot was taken as part of a periodic snapshot.
Deferred This snapshot was taken as part of a periodic snapshot, although it did not occur at the
specified interval because the connection between the source and target was not in a good
state.
User Request This snapshot was taken manually by a user.
NOTE: Because the Windows product activation is dependent on hardware, you may need to reactivate your
Windows registration after failover. Follow the on-screen prompts to complete the reactivation.