First, I'd like to thank the person that referred me to the redbook on
backing up databases with ADSM.  That helped a lot.  I still have some
questions, though.

Logical logs:  I can see that I've got logical logs stored since the
beginning to time.  They aren't large, but there's a point where the old
ones have to be ditched.  Onbar itself has no function for deleting
objects, and the versions settings for the copygroup don't help because
Onbar assigns a unique name to each logical log.  As far as ADSM is
concerned, each is a unique file.

Secondly, assuming there's a way to delete them, how far back should they
be retained?  Obviously, I should keep any logs since the last level 0
backup, but do I need anything prior to that?

Thirdly, will Onbar use inactive versions from backups? Suppose I do a
level 0 backup every day at 11:00pm.  I then want to do a point in time
restore to 2 days ago.  Will it use the corresponding inactive version
(and logfiles)?