Users Guide

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 AC 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.
You can configure 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
Power Conservation and Power Budget
CMC conserves power when the user-configured maximum power limit is reached. When the demand for power
exceeds the user configured 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 configured 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 5000W.
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