System health and power redundancy

Good power supplies are detected at boot time and system power redundancy is set at boot time.

Selected power supply mode

3+1 Power configuration

2+2 Power configuration

4 PSUs detected at POST

Health = Green (Normal)

Redundant configuration

Health = Green (Normal)

Redundant configuration

3 PSUs detected at POST

Health = Green (Normal)

Non-Redundant configuration

Health = Green (Normal)

Redundant configuration

2 PSUs detected at POST

Health = Red (critical)

System cannot power on

Health = Green (Normal)

Redundant configuration

1 PSUs detected at POST

Health = Red (critical)

System cannot power on

Health = Red (critical)

System cannot power on

System health and behavior if power supplies fail during server operation

3+1 power supply mode

Detected PSUs at POST	4 PSUs detected at POST	3 PSUs detected at POST
no PSU failure	Health = Green (Normal)	Health = Green (Normal)
1 PSU failure	Health = Amber Degraded operation	Health = Red System gracefully shuts down
2 PSU failure	Health = Red System gracefully shuts down	—

2+2 power supply mode

Detected PSUs at POST	4 PSUs detected at POST	3 PSUs detected at POST	2 PSUs detected at POST
no PSU failure	Health = Green (Normal)	Health = Green (Normal)	Health = Green (Normal)
1 PSU failure	Health = Amber Degraded operation	Health = Amber Degraded operation	Health = Red System gracefully shuts down
2 PSU failure	Health = Amber Degraded operation	Health = Red System gracefully shuts down	—
3 PSU failure	Health = Red System gracefully shuts down	—	—