The Data Movers, represented by the FileServer class, are the Celerra components that transfer data between the storage system and the network client. A Celerra Network Server can have from one to 14 Data Movers.The Data Movers are managed via the Control Station.

A Data Mover can be active (also called primary) or, in a Celerra Network Server model that supports multiple Data Movers, can be a standby for other Data Movers.

Each Data Mover is independent; there is no communication between Data Movers. If a Data Mover fails, the Control Station manages the failover to the standby Data Mover, assuming a standby has been configured.

A Data Mover and the Control Station communicate with each other using both Ethernet and serial connections. A Data Mover communicates with the network using network interface cards (NICs), which may support 10/100/1000Base T Ethernet or optical Gigabit Ethernet.

A Data Mover communicates with the back-end data storage systems using Fibre Channel connections. In the Celerra Clustered Network Server, storage processing is provided by a component of the Data Mover, a Fibre Channel HBA card, that connects to the storage array through a Fibre Channel switch. In the Celerra NS series, storage processing is provided by an auxiliary storage processor enclosure containing two storage processors.

Celerra File Servers or Data Movers are discovered as its FileServers by IP. A FileServer is defined by ComposedOf relationship with FileSystem. Conversely, a FileSystem is defined by PartOf relationship with FileServer.