About concurrent copies
You can create up to four copies of the same backup image concurrently. Those copies are created concurrently by the Inline Tape Copy feature. If the images are created during a NetBackup policy job, all are considered original images. If the images are duplicated by using the NetBackup Administration Console Catalog node or during a Vault job, they are considered duplicate images.
You must configure NetBackup to allow a sufficient number of copies in the field for the NetBackup master server. (Configured in .) By default, the value is two.
All storage units must be connected to the same media server. Also, you must configure the storage unit to allow a sufficient number of concurrent jobs to support the concurrent copies ( or setting).
You can write images concurrently to the following storage units:
Media Manager storage units. If the Media Manager storage unit has more than one drive, the source storage unit and destination storage unit can be the same.
Disk storage units.
Disk staging storage units.
Network Data Management Protocol (NDMP) storage units only during Vault duplication. Also only one copy is allowed per duplication rule (NDMP is not supported during original backup). If the NDMP storage unit has more than one drive, the source storage unit and destination storage unit can be the same.
Although specifying an NDMP storage unit restricts the number of copies to one, you can use multiple duplication rules to specify other storage units for images that are created by other media servers. For example, you can use one duplication rule to read an image from one media server and write a copy to an NDMP storage unit. Then you can use another duplication rule to read an image from a different media server and write copies to other storage units. (To specify multiple duplication rules in a Vault profile, select on the Profile dialog box Duplication tab.) Because of potential NDMP performance limitations, it is recommended that you duplicate between the disk drives and tape drives that are directly attached to the same NDMP host.
If you create multiple original images concurrently during a NetBackup policy job, the backup time that is required may be longer than for one copy. Also, if you specify both Media Manager and disk storage units, the duration of disk write operations match that of slower removable media write operations.
You cannot create images concurrently using the following:
Storage unit groups
Quarter-inch cartridge (QIC) devices
Third-party copies