Element_Addresses

   The first OpenVMS implementation of MRD supported the TF and TA
   family DLT media-changers. It used Mass Storage Control Protocol
   Display commands to indicate what cartridge should be moved.
   The MSCP uses cartridge address names instead of numbers as SCSI
   does. When SCSI support was added to the MRD, the convention
   of using strings for the address was kept and thus it has been
   since.

   In the common interface example programs, the character strings
   for the addresses are taken directly from the command line
   arguments and no special formatting is necessary. But, in
   practice, a program will probably keep SCSI addresses in
   numeric form and will have to convert those to strings. In the
   MRU command line interface and graphic user interface we use
   sprintf(3) for this:

    int element_number ;
    char element[MRD_NAME_SIZE+1] ;

    element_number = 5 ;

    sprintf(element, "%d", element_number) ;