Dell PowerStore 1200T EMC PowerStore Protecting Your Data - Page 23

● Increase volume group size ● Change volume group name ● Start migration ● Remove a protection policy NOTE: You can still perform these actions from the source system. You cannot perform a planned failover while a failover test is in progress. Stop the failover test to perform a planned failover. However, unplanned failovers may still occur uninterrupted in response to a disaster. If possible, it is recommended to stop the failover test before an unplanned failover, because any data replicated to the destination after the failover test started will be lost. You can also pause and resume replication sessions during a failover test. If you delete a replication session during a failover test, the test will be cancelled. Start a failover test You can start a failover test from the current destination data, or from any snapshot. There are two ways to start a failover test: ● From Protection > Replication, select the replication session you want to test, then select Start Failover Test. ● From the Protection tab of the resource, select Replication, then select Start Failover Test. After the failover test starts, an alert is raised on the replication session. The alert is cleared after the test is stopped. Stop a failover test Before you stop the failover test, it is recommended that you unmount file systems and stop any running applications on the destination resource to avoid data corruption. There are two ways to stop a failover test: ● From Protection > Replication, select the replication session that has a test in progress, then select Stop Failover Test. ● From the Protection tab of the resource with a test in progress, select Replication, then select Stop Failover Test. You can also choose to create a snapshot to save the test data that was created during the failover test. Planned Failover When you perform a planned failover, the replication session is manually failed over from the source system to the destination system. Prior to the failover, the destination system is synchronized with the source system, to prevent any data loss. Before performing a planned failover, make sure that you stop I/O operations for any applications and hosts. You cannot pause a replication session that is undergoing a planned failover. During a planned failover, you can take the following actions: ● Perform an unplanned failover. ● Delete the replication session by removing the protection policy on the storage resource. You cannot initiate a planned failover when a failover test is in progress. You can initiate a planned failover test from the current source data, or from any snapshot. There are two ways to initiate a planned failover: ● From Protection > Replication, select the relevant replication session, and then select Planned Failover. ● From the Protection tab of the resource, select Replication, and then select Planned Failover. After a planned failover, the replication session is inactive. To synchronize the destination storage resource and resume the replication session use the Reprotect action. You can also select the auto-reprotect option before failing over, which automatically initiates the synchronization in the opposite direction (at the next RPO) after the failover is complete, and returns the source and the target system to a normal state. Replication 23