User's Manual

16 Carrier Grade Chassis Management Controller User’s Guide Addendum
No Redundancy
Power in excess of what is necessary to power the chassis is available, even on
a failure, to continue to power the chassis.
CAUTION:
The No Redundancy mode uses optimum PSUs when DPSE is enabled for the
requirements of the chassis. Failure of a single PSU could cause servers to lose
power and data in this mode.
Power Conservation and Power Budget Changes
CMC performs power conservation 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 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 of the servers in the chassis by giving
each server a number from 1 through 9. The default priority level for all servers is 1.
The lower the number, the higher the priority level.
For instructions on assigning server priority levels, see Assigning Priority Levels
to Servers
in the Chassis Management Controller 4.1 User's Guide.
You can assign server priority using the GUI:
1
Click Servers in the system tree.
2 Click Power  Priority .
Power Conservation and Max Conservation Mode
CMC performs maximum power conservation when:
• The user selects maximum conservation mode using the Web interface or
RACADM.
• An automated command line script, issued by a UPS device, selects
maximum conservation mode.