Users Guide

Table 29. Chassis Impact from PSU Failure or Removal
PSU Configuration Dynamic PSU
Engagement
Firmware Response
Grid Redundancy Disabled CMC alerts you about loss of Grid redundancy.
Power Supply
Redundancy
Disabled CMC alerts you about loss of power supply redundancy.
Grid Redundancy Enabled CMC alerts you about loss of Grid Redundancy. PSUs in
standby mode (if any) are turned on to compensate for
power budget lost from the PSU failure or removal.
Power Supply
Redundancy
Enabled CMC alerts you of loss of Power Supply Redundancy.
PSUs in standby mode (if any) are turned on to
compensate for power budget lost from PSU failure or
removal.
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 30. 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 is lost.
AC input lost The power input for power supply has been restored.
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 modular enclosure that is configured for either an Grid Redundancy
power policy or Power Supply Redundancy power policy. The following table lists the SEL entries that
are related to 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, KVM, CMC, and power supplies), which uses four power supply units (PSUs). The
power management service optimizes power consumption and reallocates power to different modules
on the basis of requirement.
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