Library /sys$common/syshlp/tcpip$ucp_help.hlb MOUNT, Restrictions and Tips  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    If you mount remote OpenVMS directories where the NFS server is
    running TCP/IP Services software, use the /NOADF qualifier on the
    MOUNT command line unless you are using the OpenVMS-to-OpenVMS
    integration feature.

    The /NOADF requirement applies only if the remote NFS server is
    running versions of TCP/IP Services earlier than Version 3.3 and
    cannot participate in OpenVMS-to-OpenVMS mode operation. Other
    tips include:

    o  Required order of command keywords: the MOUNT keyword,
       immediately followed by mount_point. Example: MOUNT DNFS01:

    o  For the qualifiers that require a time value, specify OpenVMS
       delta time.

    o  Whenever you specify multiple options and values, use the
       following syntax:

       /qualifier=(option_a:value1,option_b:value2,value3)