Users Guide

Table 39. 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 40. 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.
Conguring power budget and redundancy
You can congure 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 dierent modules based on the requirement.
You can congure the following:
• System Input Power Cap
• Redundancy Policy
• Enable Dynamic Power Supply Engagement
• Disable Chassis Power Button
• Max Power Conservation Mode
• Remote Power Logging
• Remote Power Logging Interval
• Server Based Power Management
• Disable AC Power Recovery
Power Conservation and Power Budget
CMC conserves power when the user-congured maximum power limit is reached. When the demand for power exceeds the user
congured System Input Power Cap, CMC reduces power to servers in reverse-priority order to free power for higher priority
servers and other modules in the chassis.
If all or multiple slots in the chassis are congured with the same priority level, CMC decreases power to servers in the order of
increasing slot number. For example, if the servers in slots 1 and 2 have the same priority level, the power for the server in slot 1 is
decreased before that of the server in slot 2.
NOTE: You can assign a priority level to each server in the chassis assigning a number from 1 through 9 for each server.
The default priority level for all servers is 1. The lower the number, the higher the priority level.
The power budget is limited to a maximum of whichever set of two PSUs that is the weakest. If you attempt to set an AC power
budget value that exceeds the System Input Power Cap value, CMC displays a message. The power budget is limited to 4800W.
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