PowerEdge Server : AC Recovery Last Power State Behavior

Question 

Before 12th server Generation, if a forced ungraceful power down is asserted the last power state setting is not maintained.
For example if a 11G Sever is running, and the power is cut, when the power will be back, the server won't start automatically.

On PowerEdge™ 12th Generation (12G) and later systems if the power state is set to last, and a forced shutdown event occurs, the system will power back on if the AC is lost and then restored.
This setting can be configured in the BIOS on the server. 
 

BIOS Configuration

This option can be configure in the BIOS (F2), then in the System Security Screen


AC Power Recovery
Allows you to set how the system reacts after AC power is restored to the system. By default, the AC Power Recovery option is set to Last.


AC Power Recovery Delay
Allows you to set how the system supports staggering of power up after AC power is restored to the system. By default, the AC Power Recovery Delay option is set to Immediate.


User Defined Delay (60s to 240s)
Allows you to set the User Defined Delay when the User Defined option for AC Power Recovery Delay is selected.

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