Users Guide

The following table provides the rmware response to a PSU power down or removal as it applies to various PSU redundancy
congurations.
Table 47. Chassis Impact from PSU Failure or Removal
PSU
Conguration
Dynamic PSU
Engagement
Firmware Response
Grid Redundancy Disabled CMC alerts you of loss of Grid Redundancy.
Power Supply
Redundancy
Disabled CMC alerts you of loss of Power Supply Redundancy.
No Redundancy Disabled Decrease power to low priority servers, if needed.
Grid Redundancy Enabled CMC alerts you of 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.
No Redundancy Enabled Decrease power to low priority servers, if needed.
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 48. SEL Events for Power Supply Changes
Power Supply Event System Event Log (SEL) Entry
Insertion Power supply <number> is present.
Removal Power supply <number> is absent.
Grid or Power Supply Redundancy lost Power supply redundancy is lost.
Grid or Power Supply Redundancy regained The power supplies are redundant.
Input power received The input power for power supply <number> has been restored.
Input power lost The input power for power supply <number> has been lost.
DC output produced Power supply <number> is operating normally.
DC output lost Power supply <number> failed.
Input over-voltage An over voltage fault detected on power supply <number>.
Input under-voltage An under voltage fault detected on power supply <number>.
Input over-current An over current fault detected on power supply <number>.
Input under-current An undercurrent fault detected on power supply <number>.
DC output under-voltage An output under voltage fault detected on power supply <number>
DC output over-current An output over current fault detected on power supply <number>.
DC output under-current An output under current fault detected on power supply <number>.
Managing and Monitoring Power 229