Messages Reference Guide

Event Message Reference 37

Redundancy Unit Messages

Redundancy means that a system chassis has more than one of certain critical

components. Fans and power supplies, for example, are so important for

preventing damage or disruption of a computer system that a chassis may

have “extra” fans or power supplies installed. Redundancy allows a second

or nth fan to keep the chassis components at a safe temperature when the

primary 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 the

number of components functioning falls below the redundancy threshold.

Table 2-8 lists the redundancy unit messages.

The number of devices required for full redundancy is provided as part of

the message, when applicable, for the redundancy unit and the platform.

For details on redundancy computation, see the respective platform

documentation.

Table 2-8. Redundancy Unit Messages

Event

Description Severity Cause

1300 Redundancy sensor has

failed

Redundancy unit:

<Redundancy location

in chassis>

Chassis location:

Previous redundancy

state was:

<State>

Information A redundancy sensor in the

specified system failed.

The redundancy unit location,

chassis location, previous

redundancy state, and the

number of devices required

for full redundancy

are provided.