How to Retain or Prevent a Backup Set from being deleted
If a Backup Set needs to be Retained for a longer amount of time, the set can be saved with Retain function.
Within a Server Resource or Disk Target, go to Backup Sets, select the backup set to retain and select Retain. BE will ask for the Retain reason and then mark the set to be kept under the Retain Column. Note: the set will not be deleted until the Retain selection is removed.
Backup Exec (BE) 2012 adds a new disk management function called Data Lifecycle Management (DLM). This allows BE to correctly manage disk targets and remove expired backup data. The Backup Definition (jobs) have a setting for how long the backup data should be kept. After that timeframe has expired, DLM will delete the backup sets from Disk. DLM checks for any expired data every 4 hours by default.
DLM is only used for Disk targets. Backup to Disk (B2D) and Deduplication.
Tape targets are managed by Media Sets like the previous versions of BE.