DA_ZONE_FLAG_URSWRZ
if (softc->zone_flags & DA_ZONE_FLAG_URSWRZ)
DA_ZONE_FLAG_URSWRZ;
~DA_ZONE_FLAG_URSWRZ;
softc->zone_flags |= DA_ZONE_FLAG_URSWRZ;
softc->zone_flags &= ~DA_ZONE_FLAG_URSWRZ;