Reference Guide

38 Server Management Messages
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 2-7 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 2-7. Redundancy Unit Messages
Event
ID
Description Severity Cause
1300 Redundancy sensor has
failed
Redundancy unit: <Redundancy
location in chassis>
Chassis location: <Name of
chassis>
Previous redundancy state
was: <State>
Warning 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.
1301 Redundancy sensor value
unknown
Redundancy unit: <Redundancy
location in chassis>
Chassis location: <Name of
chassis>
Previous redundancy state
was: <State>
Warning A redundancy sensor in
the specified system
could not obtain a
reading. The redundancy
unit location, chassis
location, previous
redundancy state,
and the number of
devices required for full
redundancy are provided.