When disaster strikes on a production data center, the takeover operation is invoked to start the resiliency groups on the recovery data center.

Since the production data center is not working, the data replication between the two sites does not happen. After the production site is back up and running, you need to prepare the production site for the next failover or for a migration operation. This preparation includes cleaning up any residue and resuming the replication from the recovery to the production site.

Use the Resync operation on the Resiliency Platform console to automate these steps for the required resiliency groups. This operation cleans up the residue which includes stopping applications and virtual machines, unregistering virtual machines, unmounting file systems, datastores, etc.