About partial catalog replication
In partial catalog replication only the image database, policy, and the client configuration are replicated and the relational database components are not replicated. This allows the media servers and the devices to be preconfigured in the disaster recovery domain. You do not need to rediscover them in the event of a failover to the secondary master server.
As partial catalog replication does not replicate the relational database components of the NetBackup catalog, additional steps are required to be carried out following a failover to the disaster recovery master server before backups can be restored.