Users Guide

Table 49. SEL Events for Power Redundancy Policy Changes
Power Policy Event System Event Log (SEL) Entry
Redundancy lost Redundancy lost was asserted
Redundancy regained Redundancy lost was de-asserted
Configuring power budget and redundancy
You can configure the power budget, redundancy, and dynamic power of the entire chassis (chassis, servers, I/O modules,
iKVM, CMC, and power supplies), which uses six power supply units (PSUs). The power management service optimizes power
consumption and re-allocates power to different modules based on the requirement.
You can configure the following:
● System Input Power Cap
● Redundancy Policy
● Extended Power Performance
● Server Performance Over Power Redundancy
● Dynamic Power Supply Engagement
● Disable Chassis Power Button
● Allow 110 VAC Operation
● Max Power Conservation Mode
● Remote Power Logging
● Remote Power Logging Interval
● Server Based Power Management
● Disable AC Power Recovery
Related concepts
Power Conservation and Power Budget on page 209
Maximum Power Conservation Mode on page 210
Server Power Reduction to Maintain Power Budget on page 210
110V PSUs AC Operation on page 210
Server Performance Over Power Redundancy on page 210
Remote Logging on page 210
External Power Management on page 211
Related tasks
Configuring Power Budget and Redundancy Using CMC Web Interface on page 211
Configuring Power Budget and Redundancy Using RACADM on page 212
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. This allows 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 increasing
slot number order. 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 value equal to that of the set of three 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 failure message. The power
budget is limited to 16685 Watts.
Managing and Monitoring Power
209