Messages Reference Guide

Introduction 9
Server Administrator generates events based on status changes in the
following sensors:
• Temperature Sensor — Helps protect critical components by alerting the
systems management console when temperatures become too high inside
a chassis; also monitors a variety of locations in the chassis and in any
attached systems.
•
Fan Sensor — Monitors fans in various locations in the chassis and in any
attached systems.
•
Voltage Sensor — Monitors voltages across critical components in various
chassis locations and in any attached systems.
•
Current Sensor — Monitors the current (or amperage) output from the
power supply (or supplies) in the chassis and in any attached systems.
•
Chassis Intrusion Sensor — Monitors intrusion into the chassis and any
attached systems.
•
Redundancy Unit Sensor — Monitors redundant units (critical units such
as fans, AC power cords, or power supplies) within the chassis; also
monitors the chassis and any attached systems. For example, redundancy
allows a second or
n th fan to keep the chassis components at a safe
temperature when another fan has failed. Redundancy is normal when the
intended number of critical components are operating. Redundancy is
degraded when a component fails, but others are still operating.
Redundancy is lost when there is one less critical redundancy device than
required.
•
Power Supply Sensor — Monitors power supplies in the chassis and in any
attached systems.
•
Memory Prefailure Sensor — Monitors memory modules by counting the
number of Error Correction Code (ECC) memory corrections.
•
Fan Enclosure Sensor — Monitors protective fan enclosures by detecting
their removal from and insertion into the system, and by measuring how
long a fan enclosure is absent from the chassis. This sensor monitors the
chassis and any attached systems.
•
AC Power Cord Sensor — Monitors the presence of AC power for an AC
power cord.
•
Hardware Log Sensor — Monitors the size of a hardware log.