SD_LOWEST_VALID_THROTTLE
if ((un->un_throttle < SD_LOWEST_VALID_THROTTLE) ||
(un->un_min_throttle < SD_LOWEST_VALID_THROTTLE) ||
if ((un->un_throttle < SD_LOWEST_VALID_THROTTLE) ||
(un->un_min_throttle < SD_LOWEST_VALID_THROTTLE) ||