Hello,
An empty file completeToken (with date of the backup) must be present in /var/netscreen/dbbackup/backupX sub-directory.
If this file exist, you can consider backup is fully completed.
You can manually remove old backup or change retention value of number of backup to keep locally (in /usr/netscreen/HaSvr/var/haSvr.cfg file). Variable to change is: "highAvail.numOfBackups"
Restart of HaSvr daemons is not required.
Regards,