Power supply CRU failures are identified visually by a single green LED that is turned off when one or both of the power supplies fail. Power supply failures are also logged as IPMI events by voltage sensor logic and identified as power supply CRU failures on the front LED panel.

The I/O VRM CRU, located beside the core I/O board CRU, provides all I/O subsystem dc power.

Power Subsystem Behavior

For rx3600 servers, each bulk power supply CRU provides 1200 watts of dc power from a nominal 120 V ac 50-60 Hz. The Baseboard Management Controller (BMC) chip located on the core I/O board CRU controls the flow of +12 V dc power to the server CRUs. You can both control and display power supply status remotely with the iLO 2 MP pc and ps commands, respectively.)

The server powers on as follows:

•The Power LED on the front panel glows steady amber when one or two bulk power supplies are plugged into nominal ac voltage. The +3.3 VDC housekeeping voltage comes on and stays on whenever ac power is present.

•The BMC, iLO 2 MP, flash memory, and chassis intrusion circuits are reset after the +3.3 V dc housekeeping voltage stabilizes.

•The BMC monitors the power button on the front panel.

•When the power button is pressed or when a Wake on LAN (WOL) signal is asserted, the BMC signals the bulk power supplies to fully power on.

•+12 V dc comes up and all the cooling fans and the various VRMs power on sequentially.

•The BMC signals that the server is ready to come out of reset.

•The server comes out of reset.

•The zx2 chip resets all components connected and the server begins the boot process.

System Power LED/Switch

The front panel system power LED indicates system power status. It is incorporated with the power button.

The power button has a momentary switch that is recessed to prevent accidental powering on or off.

If the OS is running, press the power button for less than four seconds to gracefully shut down the OS and power off the system. Press the power button for greater than four seconds to power off the system immediately. When the server is booting (before the system has passed EFI_EXIT_BOOT_SERVICES), the BMC powers off the server immediately when you press the button.

If the OS is not running or is hung, or the BMC is not responding, press and hold the power button for more than four seconds to power off the system.

To ensure that the system powers on correctly, the power button must not be pressed again for four seconds after it powers off.

Table 5-19lists the power LED states.

Table 5-19

Power LED States

 

 

 

 

 

LED Color

 

Flash Rate

Definition

 

 

 

 

None

 

Off

No ac power to the system

 

 

 

 

Green

 

Steady

System power is on

 

 

 

 

Amber

 

Steady

System is shut down, but ac and standby power are available

 

 

 

 

System Power (BPS and I/O VRM) 165