I run Oracle/RMAN backups to a disk storage unit and duplicate these to
tapes.
I later expire the disk copies and verify availabily of the tape copy.  An
issue I have discovered is that these duplicate tapes do not have a time
assigned date which triggers our operators to think that the tape is free to
be scratched.  To add insult to injury, netbackup allows you to scratch
these
duplicate tapes.  Am I not doing something correctly here?

Netbackup 3.4.2
Solaris 8
Oracle 8.1.7.4