VMS Help DECnet-Plus, DCL Commands, COPY, Qualifiers, /VOLUME  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /VOLUME=n

    Qualifier type:        Output file qualifier

    Supported file types:  Local

    This qualifier directs an entire output file to a specified rela-
    tive volume number (n) of a multivolume set

    Default value:         File takes arbitrary position within multi-
                           volume set