The first step of the Vault process is to choose the backup images that are candidates to be transferred off site. You must configure the image selection for every Vault job. Vault uses the criteria in a Vault profile to determine which backup images are candidates to send off site. (A Vault profile is a set of rules for selecting images, duplicating images, and ejecting media.)
If you create multiple original images concurrently during a backup job, Vault can send original images off site (depending on the profile rules). If you duplicate images, Vault uses the primary backup image as the source image for the duplication operation. However, Vault duplicates from a nonprimary copy on disk if one exists. That duplication process improves performance.