VMS Help ANALYZE, /MEDIA, Qualifiers, /SHOW  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  /SHOW[=(keyword[,...])]

   Lists the contents of the DBBF before or after (or both) the
   medium is exercised or modified.

   Qualifier Keywords

   [NO]BEFORE,[NO]AFTER

       Specifies whether the contents of the DBBF are listed before or
       after (or both) the medium is exercised. After is the default.