This value is only useful for the shutdown trap. This scalar is not persistent. A GET on this scalar will always return: shutdownCauseNotReported (11). Defines the last known shutdown cause. This shutdown is the last orderly shutdown of the system. Do not confuse this with the ResetCause. e.g. this value would have no meaning if the shutdown cause was from a power failure, but it does have meaning if the shutdown was due to a scheduled reboot.