If the server is not listed
in any active groups, the server's bootstrap (containing the media index
and the server's client index) will back up every time every group runs.
This is a safeguard. To prevent this, put the server in an active
group.
There is a "feature" in Networker 6.0.1 that even for skipped savegroups, it will still write a bootstrap into the server's tape drive.