Dell PowerStore Protecting Your Data

Failing over a replication session includes switching roles between the source and destination systems and reversing the direction of the replication session.

There are two types of failovers:

• Planned failover - Initiated by the user. Includes synchronization between source and destination to prevent data loss.
• Unplanned failover - Initiated by the destination system in response to source system failure.

During a replication session failover, the system performs the following actions:

• Stop I/Os on the source object.
• Synchronize the source and destination storage objects (occurs only in a planned failover).
• Stop the replication session.
• Reverse roles between source and destination systems.
• Promote the latest object version on the new source.
• Resume I/Os on the new source (initiated by the user).
• For a planned failover, if specified by the user, reprotect.

After a failover, you can access applications on the new source system to recover data.