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

 device

    Optional. Default: All mounted file systems.

    Local device for which to display mount information. Specify one
    of the following:

    o  DNFSn: - the full NFS device name and directory tree, for
       example, DNFS3:[USER.NOTES]

    o  Volume label

    o  Logical name for the device

    You can use abbreviations and wildcards.