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) ;