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 the temperature in a variety of locations in the
chassis and in attached system(s).
•
Fan Sensor — Monitors fans in various locations in the chassis and in
attached system(s).
•
Voltage Sensor — Monitors voltages across critical components in various
chassis locations and in attached system(s).
•
Current Sensor — Monitors the current (or amperage) output from the
power supply (or supplies) in the chassis and in attached system(s).
•
Chassis Intrusion Sensor — Monitors intrusion into the chassis and
attached system(s).
•
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 attached system(s). 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
attached system(s).
Warning /
Non-critical
An event that is not necessarily significant, but may indicate a
possible future problem. For example, a Warning/Non-critical
alert may indicate that a component (such as a temperature
probe in an enclosure) has crossed a warning threshold.
Critical /
Failure / Error
A significant event that indicates actual or imminent loss of
data or loss of function.
For example, crossing a failure
threshold or a hardware failure such as an array disk.
Table 1-1. Understanding Event Messages
Icon Alert Severity Component Status