/sys$common/syshlp/helplib.hlb EXCHANGE, COPY, Qualifiers, /REWIND  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /REWIND
       /NOREWIND

    Determines whether a DOS-11 input magnetic tape reel logically
    rewinds to the beginning-of-tape mark (BOT) before EXCHANGE
    searches for the file name specified in the input specifier. This
    qualifier is valid for DOS-11 magnetic tape only. The default is
    /NOREWIND.

    Use the /REWIND qualifier when you want COPY to search for a file
    from the logical beginning of the magnetic tape, instead of from
    the current physical position of the tape.