NetBackup uses either one of the following storage units:

• NDMP-type storage units (for local or three-way backup)

  NetBackup requires NDMP-type storage units when you back up NDMP host data to the devices that are as follows:

  • Attached to an NDMP host

  • Available to the NDMP host on a SAN

  An NDMP storage unit can contain standalone or robotic drives. Robotic controls can be in a TLD (tape library DLT) or ACS robot type.

• Media Manager storage units (for backup to devices that are attached to a NetBackup media server)

  You can use the drives that were configured in Media Manager-type storage units when you back up NDMP host data to devices that are as follows:

  • Attached to a NetBackup for NDMP server

  • Available to the server on a SAN

  For NDMP backup, drives in Media Manager-type storage units do not have to be dedicated to NDMP data. They can store backups of regular (non-NDMP) NetBackup clients as well as of NDMP clients.