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During a Vault session, Vault builds a list of images that are candidates for duplication or ejection.
The preview.list file, which resides in the session directory for the current Vault session, includes all images that match the criteria specified on the profile Choose Backups tab except for the following:
If a copy of an image already is in the Off-site Volume Group, that image will not be included in the preview.list file. Because images that have a copy in an Off-site Volume Group are already vaulted, Vault does not select them as candidates for vaulting.
If the Source Volume Groups criteria in the Locations field on the Choose Backups tab is set to a specific volume group and if no copy of that image exists in that volume group, the image is not added to the preview.list file.
After the preview.list file is generated, Vault evaluates the images in it to determine if they should be duplicated or ejected. Because several filters (that is, other profile configuration options) can exclude an image from duplication and ejection, the preview.list file can be a superset of the images that eventually is duplicated by the session.