I had setup a backup server as follows:

1. Backup to Disk Folder on dedicated hard drive.
2. Single Media Set with no overwrite protection and unlimited appends.
3. Full backup on Mondays with option to append or overwrite if no
appendable media.
4. Differential backup on Tue-Fri with option to append or overwrite if no
appendable media.

I thought that Backup Exec would just continue appending to the backup to
disk folder until the hard drive was full. Then it would start overwriting
the individual backup to disk files starting with the oldest. What actually
happens is that the full always overwrites.

What I want to accomplish is to get maximum retension by not overwriting
until the backup to disk folder is full.