You can generate a backup set of a client node's active, backed-up files from the server onto sequential media that can be read by the device restoring the backup set.
You can also set the server to allow a client node to back up a portion of a file that has been previously backed up, rather than the entire file. The portion of the file that is backed up is called a subfile.
For more information about these tasks, see Chapter 14, Managing Data for Client Nodes.