You might need to mark the partition of the DDB for recovery in the following situations:
- When the drive hosting the DDB is lost or the DDB files are missing and the DDB is recovered by the DDB Move operation.
 
Procedure
- 
From the CommCell Browser, expand Storage Resources > Deduplication Engines > storage_policy > deduplication_database.
 - 
Right-click the appropriate partition, and then click Mark for Recovery.
A message appears that asks you to mark this partition for recovery.
 - 
Click Yes.
A message appears that tells you that the partition is successfully set for recovery.
 - 
Click OK.