Users Guide

Table Of Contents
the redundancy status is No, and the overall power health is Critical. This is because the system is not able to operate in
accordance with the configured redundancy policy.
NOTE: CMC does not perform a pre-check of these conditions when you change the redundancy policy to or from grid
redundancy. So, configuring the redundancy policy may immediately result in redundancy lost or a regained condition.
Power management after PSU failure
In the event of a PSU failure or removal, the power supplied to servers may be reduced. In extreme cases servers could be
powered off in an attempt to sustain operation. Configuring and maintaining Grid Redundancy avoids any impact to servers for a
single PSU failure.
Power supply and Redundancy policy changes in system event log
Changes in the power supply state and power redundancy policy are recorded as events. Events related to the power supply
that record entries in the system event log (SEL) are power supply insertion and removal, power supply input insertion and
removal, and power supply output assertion and de-assertion.
The following table lists the SEL entries that are related to power supply changes:
Table 27. SEL events for power supply changes
Power Supply Event System Event Log (SEL) Entry
Insertion Power supply is present.
Removal Power supply is absent.
AC input received The power input for power supply has been restored.
AC input lost The power input for power supply is lost.
DC output produced Power supply is operating normally.
DC output lost Power supply failed.
Events related to changes in the power redundancy status that record entries in the SEL are redundancy loss and redundancy
regain for the enclosure that is configured for the Grid Redundancy power policy or Redundancy Alerting Only power policy.
The following table lists the SEL entries that are related to power redundancy policy changes.
Table 28. SEL events for power redundancy policy changes
Power Policy Event System Event Log (SEL) Entry
Redundancy lost Power supply redundancy is lost.
Redundancy regained The power supplies are redundant.
Configuring power budget and redundancy
You can configure the power budget, redundancy, and dynamic power of the entire chassis (chassis, servers, I/O module,
CMC, PCIe, and chassis infrastructure). The power management service optimizes power consumption and reallocates power to
different modules based on the requirement.
You can configure the following:
System Input Power Cap
Redundancy Policy
Disable Chassis Power Button
Max Power Conservation Mode
Remote Power Logging
Remote Power Logging Interval
Disable AC Power Recovery
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Managing and monitoring power