Penguin Computing Relion 1900e, Technical Manual

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Relion 1900e/2900e Manual
61 Revision 1.3
7.2 Platform Management Features and Functions
7.2.1 Power Sub-system
The server board supports several power control sources which can initiate power-up or power-down
activity.
Table 19. Server Board Power Control Sources
Source
External Signal Name or
Internal Subsystem
Capabilities
Power button Front panel power button Turns power on or off
BMC watchdog timer Internal BMC timer Turns power off, or power cycle
BMC chassis control commands Routed through command processor Turns power on or off, or power cycle
Power state retention Implemented by means of BMC internal logic Turns power on when AC power returns
Chipset Sleep S4/S5 signal (same as POWER_ON ) Turns power on or off
CPU Thermal Processor Thermtrip Turns power off
PCH Thermal PCH Thermtrip Turns power off
WOL(Wake On LAN) LAN Turns power on
7.2.2 Advanced Configuration and Power Interface (ACPI)
The server board has support for the following ACPI states:
Table 20. ACPI Power States
State Supported Description
S0 Yes
Working

The front panel power LED is on (not controlled by the BMC).

The fans spin at the normal speed, as determined by sensor inputs.

Front panel buttons work normally.
S1 No Not supported
S2 No Not supported
S3 No Not supported
S4 No Not supported
S5 Yes
Soft off

The front panel buttons are not locked.

The fans are stopped.

The power-up process goes through the normal boot process.

The power, reset, front panel NMI, and ID buttons are unlocked.
7.2.3 System Initialization
During system initialization, both the BIOS and the BMC initialize the following items.
7.2.3.1 Processor Tcontrol Setting
Processors used with this chipset implement a feature called Tcontrol, which provides a processor-specific
value that can be used to adjust the fan control behavior to achieve optimum cooling and acoustics. The
BMC reads these from the CPU through PECI Proxy mechanism provided by Manageability Engine (ME). The
BMC uses these values as part of the fan-speed-control algorithm.