Commvault DR Restore to New host

Environment

• Commvault Version: 11.40.51
• Windows Server
• CommServe and MediaAgent installed on the same server
• Primary Storage: Disk Library (Deduplication Enabled)
• Secondary Copy (Copy-2): Remote Disk Library (Deduplication Enabled)
• Copy-2 uses its own Global Deduplication Policy

Disaster Recovery Test Scenario

1. Configure a Primary Deduplicated Disk Library.
2. Configure an Auxiliary Copy (Copy-2) to a remote deduplicated Disk Library.
3. Run backups successfully.
4. Run Auxiliary Copy successfully.
5. Create a CommServe Disaster Recovery Backup.
6. Simulate a complete disaster:
   • Original CommServe is lost.
   • Original MediaAgent is lost.
   • Original DDB files are completely lost.
7. The remote Copy-2 Disk Library (Chunk Store) remains intact.
8. Install Commvault 11.40.51 on a new Windows server.
9. Restore the CommServe using the DR Backup.
10. Reconnect the existing remote Disk Library.

Current Status

After DR recovery:

• CommServe recovery completed successfully.
• Storage Policies were restored.
• Disk Library was restored and is Online.
• Mount Path is Online.
• Deduplication Engine objects were restored.
• The Chunk Store still exists on the remote storage.
• The original DDB files do not exist

Problem

When I run Recover Deduplication Database, I receive the following message:

"No Deduplication Backup exists. Skipping reconstruction."

The reconstruction process never starts.

• Is there any additional step required after CommServe DR recovery (for example, media catalog synchronization, library recovery, or another operation) before DDB Reconstruction can begin?
• Is a DDB Backup mandatory for this disaster recovery scenario, or should Full Reconstruction from the Chunk Store work without a DDB Backup?

Any clarification would be greatly appreciated.

Thank you