Reference Guide

8 Introduction
Understanding Event Messages
This section describes the various types of event messages generated by the Server Administrator.
When
an event occurs on your system, the Server Administrator sends information about one of the
following event types to the systems management console:
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.
Table 1-1. Understanding Event Messages
Icon Alert Severity Component Status
OK/Normal
An event that describes the successful operation of a unit. The alert is provided for
informational purposes and does not indicate an error condition. For example, the
alert may indicate the normal start or stop of an operation, such as power supply or
a
sensor reading returning to normal.
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.