Bob asked about writing more than 1 export command to the same
tape.  Sorry...I have to confirm your suspicions....it can't
be done currently.  We are aware of this restriction (it also
applies to DB backups)...I don't think this will be fixed in the
very near future but it is on our list of items we wish to do...Greg Tevis

From:         Bob Klein <KL2 AT CU.NIH DOT GOV>
Subject:      Using More than 1 Export Command to the Same Tape