Vault can eject both original backups and duplicate images, so you can spread the load between backup jobs and Vault duplication jobs. For example, if your backup window is too small to create multiple simultaneous copies of all backups, you can create multiple copies of some of the backups and only one copy of the other backups. Then configure a Vault profile to duplicate from the single original backups and eject both the original images and the duplicate images.
Some examples are as follows:
When you run that Vault profile, Vault copies backup images from NetBackup policy B only and does not duplicate images from policy A because an original already exists in the offsite volume pool. If you configured the profile for eject, it ejects both the copy of the original media from policy A and the duplicate media from policy B.