Dell 2 manual Power required for new server is not

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.

This occurs if the administrator had configured power limit for the chassis lower than the full power allocation to the servers or if insufficient power is available to servers requiring high power.

The following table provides the actions taken by CMC, when a new server is powered on in the scenario described earlier.

Table 29. CMC Response When a Server Power-On is Attempted

Worst Case Power is	CMC Response	Server Power On
Available

Yes	No power conservation is required
No	Perform power conservation:
	•	Power required for new server is available
	•	Power required for new server is not
		available

Allowed

Allowed

Not Allowed

If a PSU stops functioning, it results in a non-critical health state and a PSU failure event is generated. The removal of a PSU results in a PSU removal event.

If either event results in a loss of redundancy, on the basis of power allocations, a loss of redundancy event is generated.

If the subsequent power capacity or the user power capacity is greater than the server allocations, servers have degraded performance or, in an extrement case, servers may be turned off. Both conditions are in reverse-priority order; that is, the low-priority servers are turned off first.

The following table provides the firmware response to a PSU turnoff, or removal as it applies to various PSU redundancy configurations.

Table 30. Chassis Impact from PSU Failure or Removal

PSU Configuration	Dynamic PSU	Firmware Response
	Engagement
Grid Redundancy	Disabled	CMC alerts you about loss of Grid redundancy.
Power Supply	Disabled	CMC alerts you about loss of power supply redundancy.
Redundancy
Grid Redundancy	Enabled	CMC alerts you about loss of Grid Redundancy. PSUs in
		standby mode (if any) are turned on to compensate for
		power budget lost from the PSU failure or removal.
Power Supply	Enabled	CMC alerts you of loss of Power Supply Redundancy.
Redundancy		PSUs in standby mode (if any) are turned on to
		compensate for power budget lost from PSU failure or
		removal.

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