VMS Help SHOW, DEVICES, Qualifiers, /MULTIPATH  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Displays all devices that are currently multipath sets.

    If you specify a device name, only the characteristics of that
    device are displayed; however, if the device is not a multipath
    set, the command issues a message indicating there is no such
    device. If you specify a generic device name, the characteristics
    of all such devices that are currently multipath sets are
    displayed.