I am running TSM 5.1.9 on AIX 5.2  and did some EXPORT NODEs to save
some important data "forever".  When I went to retrieve it 5 months
later it was gone.  The tapes were overwritten.  No info was in volhist
either.  I run:     DELETE VOLHIST TYPE=ALL TODATE=TODAY-90   to keep
the volume history manageable.  Should I be doing this?  Does anyone
have an answer for me on how the EXPORT data was deleted and also some
recommendations ?  Any insite would be appreciated.  

Thanks and have a nice day.

Ralph