Working with backup sets : Permissions Only backup sets
 
Permissions Only backup sets
About Permissions Only backup sets
You can use the Permissions Only backup set to back up only the permissions of the selected item. This reduces the backup time because it does not back up the actual files. You can select more than one backup item and a separate dump file is saved for each backup item.
An Online File system backup set saves its files with the current permissions and attributes. If the permissions or attributes are changed, but the content of the files remains the same, DS-Client will not detect the changes at the next backup session. In this type of backup environment, modifications to attributes like Compress, Read-Only, Hidden, Archive, and Index can be detected and backed up with a Permissions Only backup set.
NOTE:  Modifications to the Encrypt attribute can be detected only by using an Online File system backup set.