Performing a Reverse Reprotection

Scenarios

After a failover, data is not automatically synchronized from the disaster recovery site to the production site, and protection is disabled for protected instances. To start data synchronization from the disaster recovery site to the production site, perform a reverse reprotection.

• After you perform a reverse reprotection, the initial data synchronization starts. During the data synchronization, if disaster recovery site servers are restarted, data will be resynchronized until the synchronization is complete.
• During a reverse reprotection, SDRS stops the production site server and changes the server status to Planned stop.
• Reverse reprotection overwrites data of production site servers with data of disaster recovery site servers. If there is data written to production site servers after the failover is performed, such data will be overwritten.
• Reverse reprotection is not supported for replica pairs whose Type is set to IDC-to-cloud and Scenario set to V2C.

Prerequisites

• Ensure that, in 24.6.0 or an earlier version, you have preconfigured the disaster recovery site servers that you want to perform reverse reprotection according to Configuring Disaster Recovery Site Servers.
• In 24.9.0 or a later version, SDRS automatically configures the disaster recovery gateway, so you do not need to preconfigure the disaster recovery site servers before performing a reverse reprotection. In 24.6.0 or an earlier version, ensure that you have upgraded the SDRS software on the gateway and production site servers to 24.9.0 or later and reconfigured the gateway according to Configuring a Disaster Recovery Gateway.
• The status of protected instances in the protection group is Failover completed or Reverse reprotection failed.

Procedure

1. Log in to the management console.
2. Click Service List and choose Storage > Storage Disaster Recovery Service.

   The Storage Disaster Recovery Service page is displayed.

3. Choose Asynchronous Replication. In the right pane, locate the replica pair housing the protection group you want to perform reverse reprotection and click the number in the Protection Groups column.

   The Protection Groups tab page is displayed.

4. In the navigation tree, choose the target protection group.

   The protection group details page is displayed.

5. In the upper right corner of the basic information area, choose More > Perform Reverse Reprotection.

   The Perform Reverse Reprotection page is displayed.

   

6. Select the protected instances to be reprotected.

   

7. Click Submit. The protected instance status changes to Reverse reprotecting.

   

8. After 1 to 2 minutes, the protected instance status changes to Synchronizing, and the amount of data to be synchronized and estimated remaining time are displayed.