How to configure Backup-Disk jobs,media sets & Backup Exec for proper overwriting of backup sets?
Media Overwrite Protection Level: FULL. (From tools --> Options --> Media Management)
Job should start as Overwrite Only. (Backup job properties)
Media Set Configurations:
For daily backups with one week retension: OPP 6 days & AP None
For Weekly backups with a month of retension: OPP 4 weeks & AP None
For Monthly Backups with a Year retension: OPP 360 days (some value less than an year but more than 11 months) & AP None.
With all the above settings, each B2D job will create a separate backup set (.bkf file) and from the starting of second cycle BE starts overwriting the oldest among the recyclable media.