Ten or more years ago, there might have been some need to know what tapes might 
be involved in an operation; but with advancing technology, the need is largely 
nonexistent (VTL, etc.).  With enterprise level equipment, humans should not 
have to know what media might be called for.  Keep in mind as well that the 
media that data is physically present on can change by the time you initiate 
the operation - and can even change *during* the operation.

   Richard Sims