Watching conditions.
WHAT TO MONITOR
Temperature, at intakes and at several heights Humidity Airflow Water leaks Smoke and combustion products Door status
WHY AT INTAKES
Because that is what equipment experiences.
WHAT TO PLACE SENSORS ON
Racks themselves, not only walls.
WHY
Wall sensors report room conditions, which may differ substantially from rack conditions.
WHAT TO ALERT ON
Temperature or humidity outside the band Rapid change Any leak detection Any smoke detection Unauthorised door opening
WHAT TO RECORD
Conditions over time, so trends and patterns are visible.
WHAT TRENDS REVEAL
Cooling capacity gradually becoming inadequate as load grows Seasonal effects Degrading equipment
WHAT TO REVIEW
Alerts that fired, and whether each was actionable.
WHAT TO TEST
That alerts actually reach someone who can act.
WHAT TO AVOID
Monitoring nobody watches Alerts so frequent they are ignored
