Users Guide

Table Of Contents
If the subsequent power capacity or the user power capacity is greater than the server allocations, servers have degraded performance or,
in an extrement case, servers may be turned o. Both conditions are in reverse-priority order; that is, the low-priority servers are turned o
rst.
The following table provides the rmware response to a PSU turno, or removal as it applies to various PSU redundancy congurations.
Table 39. Chassis Impact from PSU Failure or Removal
PSU
Conguration
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 40. 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 modular enclosure that is congured 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.
Table 41. 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.
Managing and Monitoring Power 183