Home > Data Protection > PowerProtect DD Series Appliances > Dell PowerProtect DD Series Appliances with Veeam Backup and Replication: Configuration Guide > Reference Architecture
Veeam Backup and Replication uses two Data Mover Services to communicate with DD series appliance. These services are responsible for data processing and data transfer.
The Veeam Data Mover services are not hosted on DD series appliance storage. So, the gateway server is deployed to communicate with DD series appliance. A gateway server is an auxiliary backup infrastructure component that connects the backup server and backup repository.
When any job is run, it addresses the backup repository, data mover service on the gateway server establishes a connection with the data mover service on the backup proxy, enabling efficient data transfer over the network.
Note: For DD series appliance storage systems working over Fibre Channel, the gateway server must be defined explicitly that communicates with DD series appliance.
The DD series appliances are presented to Veeam Backup and Replication software as a DDBoost, CIFS, NFS or DD VTL storage target or depending on the media agent platform. For CIFS/NFS, the first consideration to address is what level of CIFS or NFS sharing is wanted for the DD series appliance storage.
By default, the entire DD Series Appliance directory structure (\\datadomain\backup) can be shared by CIFS/NFS/DDBoost to all or selected hosts. Alternatively, subfolders or an MTree can be created for explicit sharing. The choice will depend on the specific use case for the customer environment.