Viewing Power Budget Status Using Racadm; Redundancy Status And Overall Power Health; Power Management After Psu Failure; Power Management After Removing Psu - Dell PowerEdge VRTX User Manual

Viewing Power Budget Status Using RACADM

Open a serial/Telnet/SSH text console to CMC, log in, and type:
racadm getpbinfo
For more information about getpbinfo, including output details, see the getpbinfo command section in the
Management Controller for PowerEdge VRTX RACADM Command Line Reference Guide .

Redundancy Status and Overall Power Health

The redundancy status is a factor in determining the overall power health. When the power redundancy policy is set, for
example, to AC Redundancy and the redundancy status indicates that the system is operating with redundancy, the
overall power health is typically OK. However, if the conditions for operating with AC redundancy cannot be met, the
redundancy status is No, and the overall power health is Critical. This is because the system is not able to operate in
accordance with the configured redundancy policy.
NOTE: CMC does not perform a pre-check of these conditions when you change the redundancy policy to or from
AC redundancy. So, configuring the redundancy policy may immediately result in redundancy lost or a regained
condition.

Power Management After PSU Failure

When an insufficient-power event occurs, such as a PSU failure, CMC reduces power supply to the servers . After
reducing the power, CMC reevaluates the power needs of the chassis. If power requirements are still not met, CMC
turns off the lower priority servers. However, this is done on the basis of power redundancy policy that you set on your
CMC. A redundant server can tolerate the loss of power without impacting the performance of the servers.
Power for higher priority servers is restored incrementally, while power needs remain within the power budget. To set
the redundancy policy, see

Power Management After Removing PSU

CMC may begin conserving power when you remove a PSU or a PSU AC cord. CMC decreases power to the lower
priority servers until power allocation is supported by the remaining PSUs in the chassis. If you remove more than one
PSU, CMC again evaluates the power requirements when the second PSU is removed to determine the firmware
response. If power requirements are still not met, CMC may turn off the low-priority servers.
Limits
• CMC does not support
server; however, you can perform user-initiated turn-offs.
• Changes to the PSU redundancy policy are limited by the number of PSUs in the chassis. You can select any of
the two PSU redundancy configuration settings listed in

New Server Engagement Policy

If a new server that is turned on exceeds the power available for the chassis, CMC may decrease the power to the low-
priority servers. This could happen if the administrator has configured a power limit for the chassis that is below what
would be required for full power allocation to the servers, or if insufficient power is available in case higher power
requirements by all servers in the chassis. If enough power cannot be freed by reducing the allocated power of the low-
priority servers, the new server is not allowed to turn on.
Configuring Power Budget and
automated power-down of a low-priority server to allow turning-on of a higher priority
Redundancy.
Default Redundancy
Chassis
Configuration.
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