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

       /FORCE_REMOVAL ddcu:

    Expels a named shadow set member from the shadow set.

    If connectivity to a device has been lost and the shadow set is
    in mount verification, this qualifier causes the member to be
    expelled from the shadow set immediately.

    If the shadow set is not currently in mount verification, no
    immediate action is taken. If connectivity to a device has
    been lost but the shadow set is not in mount verification, this
    qualifier lets you flag the member to be expelled from the shadow
    set, as soon as it does enter mount verification.

    The device specified must be a member of a shadow set that is
    mounted on the node where the command is issued.