How scanning of remote storage works
Remote storage data is hierarchical, with two defined levels of storage.
Remote storage automatically copies eligible files on your local volumes to a tape library, then monitors space available on the local volumes. File data is cached locally so that it can be accessed quickly as needed. When necessary, remote storage moves data from the remote storage to local storage. When you need to access a file on a volume managed by remote storage, open the file as usual. If the data for the file is no longer cached on your local volume, remote storage recalls the data from a tape library.