Dell DR4000 - Manual (Page 17)

17 Setting up RDA Backup to Dell™ DR4x00 Disk Backup Appliance on Dell™ NetVault
Selecting ‘Create Secondary Copy’:
If you want to Duplicate/Replicate the backup Image after the backup is done, select Create
Secondary copy option. Then select target and source devices.
To select target device navigate to: Advanced options -> Enable ‘Create Secondary Copy’ -> Using
target Set -> Manage -> Select Device
To select source device: Using Source Set -> Manage -> Select Device
Selecting ‘optimized replication’: