> I've been trying to weight the advantages of dump and tar.
> 
> What I like about tar is I can do a 'tar cz /'  and just backup everything
> to one tape (20Gig DLT).
 
> With dump, (if I read the man page correctly) I can only backup one
> device-partition per tape, but that incremental backup looks sweet.
you may compress with dump too. just pipe through gzip
but using build in tape compression is better solution - works much faster
and does not consume CPU power.

and you may use non-rewinding device to back up more partitions on the
same tape