User's Manual

Power Management 205
PSU Power-downs and Removals With a No Redundancy Policy
The CMC may begin conserving power when you power-down or gracefully
extract a PSU. The CMC decreases power to the lower priority servers until
power consumption is supported by the remaining PSUs in the chassis. If you
power-down or remove more than one PSU, the CMC evaluates power needs
again when the second PSU is removed to determine the firmware response.
Limits
• The CMC does not support automated power-down of a lower priority
server to allow power up of a higher priority server; however, you can
perform user-initiated power-downs.
• Changes to the PSU redundancy policy are limited by the number of PSUs
in the chassis. The M1000e chassis ships with one of two configurations:
three PSUs or six PSUs. You can select any of the three PSU redundancy
configuration settings listed in "Redundancy Policies" on page 199.
However, some redundancy policies, such as AC Redundancy, are not
available for chassis with fewer than six PSUs (the maximum number
allowable per chassis).
Configuring and Managing Power
You can use the Web-based and RACADM interfaces to manage and
configure power controls on the CMC. Specifically, you can:
• View power budget status for the chassis, servers, and PSUs
• Configure power budget and redundancy for the chassis and all chassis
components (chassis, servers, IOMs, iKVM, primary and standby CMC,
and PSUs)
• Execute power control operations (power-on, power-off, system reset,
power-cycle) the chassis
Viewing the Health Status of the PSUs
The Power Supply Status page displays the status and readings of the PSUs
associated with the chassis. For more information about CMC power
management, see "Power Management" on page 197.