Reverse resynchronizing mirror relationships

You can use System Manager to reestablish a mirror relationship that was previously broken. In a reverse resynchronization operation, you reverse the functions of the source and destination.

Before you begin

The source volume must be online.

About this task

You can use the destination volume to serve data while you repair or replace the source, update the source, and reestablish the original configuration of the systems.
When you perform reverse resynchronization, the contents on the mirror source are overwritten by the contents on the destination.
Attention: This operation can cause data loss on the source.
When you perform reverse resynchronization, the mirror policy of the relationship is set to DPDefault and the mirror schedule is set to None.
You cannot use System Manager to perform a reverse resynchronization operation in the following scenarios:
- For Infinite Volumes with storage classes, if new constituents have been added to the source Infinite Volume since the mirror relationship was created.
  You should use OnCommand Workflow Automation instead.
- For a mirror relationship between Infinite Volumes, if the cluster peer relationship is in an unhealthy state.
  You should use the command-line interface (CLI) instead.

Steps

Click Protection > Relationships.
Select the mirror relationship that you want to reverse.
Click Operations > Reverse Resync .
Select the confirmation check box, and click Reverse Resync.
Optional: If you are reverse resynchronizing a mirror relationship between Infinite Volumes, click Run in Background to run the operation in the background.