control station is the main thing where the total system operations are monitored , maintained , and datamover is another component
datamover is for file access , file management ...
VNX have disks right , there data will be stored , and when a NAS user (NFS client or CIFS client) want to read some file data, datamover will take care of finding data on disks and move that data to IP network (because NFS, CIFS clients are connected to IP network interfaces)
