NDMP devices are protected at the volume level. When running an on-demand backup or creating a backup schedule for an NDMP client, you must specify the volume(s) you wish to protect. Each volume is protected individually.
The protocol limits the number of incremental backups between successful full backups to 9. If your backup schedule has more than 9 incrementals between each full backup, incrementals are automatically promoted to differentials as needed and then jobs resume as scheduled. For more information, see Automatic promotions of NDMP Incremental backups.
Note: Enterprise backup scheduling is not supported for NDMP clients.