This enumerated value records the severity Cisco assigned to this specific POST event, on UCS Manager's standard fault-severity scale. severity is what an admin actually triages by when multiple POST events fire during the same boot attempt, working the 'critical' ones first regardless of which component logged them. A severity of 'major' would put this POST event ahead of a 'minor' one logged on the same blade during triage, even if the minor one fired first chronologically.