> tape to write the date on it and then put it back in. How many
> back-ups do you suppose are on that tape?


The tapes are rotated daily.

What I plan is to do a -0 backup Saturday morning and then do a incremental
backup on the rest of the days.

The man page isn't all that clear on what dump levels other that -0 (zero)
do, but I assume that if I leave omit a dump level from the command, dump
will default to the "modified Tower of Hanoi algorithm" as implied.

jam