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

       /BLANK_TAPE=identification-number

    Requires VOLPRO (volume protection) privilege.

    Sends a message to the magnetic tape file system indicated by
    the identification number to override the checking of volume
    label information. The volume label must be specified in the
    message-text parameter. The current terminal must be enabled as
    an operator terminal for TAPES.