Intel S2600GZ S2600GZ/GL - Page 68

Intel® Server Board S2600GZ/GL TPS Platform Management Functional Overview State Supported S1 Yes S2 No S3 No S4 No S5 Yes Description Sleeping. Hardware context is maintained; equates to processor and chipset clocks being stopped.  The front panel power LED blinks at a rate of 1 Hz with a 50% duty cycle (not controlled by the BMC).  The watchdog timer is stopped.  The power, reset, front panel NMI, and ID buttons are unprotected.  Fan speed control is determined by available SDRs. Fans may be set to a fixed state, or basic fan management can be applied. The BMC detects that the system has exited the ACPI S1 sleep state when the BIOS SMI handler notifies it. Not supported. Supported only on Workstation platforms. See appropriate Platform Specific Information for more information. Not supported. 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. 6.3 Power Control Sources The server board supports several power control sources which can initiate a power-up or power-down activity. Table 16. Power Control Initiators Source Power button BMC watchdog timer Command Power state retention Chipset CPU Thermal WOL(Wake On LAN) External Signal Name or Internal Subsystem Front panel power button Internal BMC timer Routed through command processor Implemented by means of BMC internal logic Sleep S4/S5 signal (same as POWER_ON) CPU Thermtrip LAN Capabilities Turns power on or off Turns power off, or power cycle Turns power on or off, or power cycle Turns power on when AC power returns Turns power on or off Turns power off Turns power on 6.4 BMC Watchdog The BMC FW is increasingly called upon to perform system functions that are time-critical in that failure to provide these functions in a timely manner can result in system or component damage. Intel® S1400/S1600/S2400/S2600/S4600 Server Platforms introduce a BMC watchdog feature to provide a safe-guard against this scenario by providing an automatic recovery mechanism. It also can provide automatic recovery of functionality that has failed due to a fatal FW defect triggered by a rare sequence of events or a BMC hang due to some type of HW glitch (for example, power). This feature is comprised of a set of capabilities whose purpose is to detect misbehaving subsections of BMC firmware, the BMC CPU itself, or HW subsystems of the BMC component, and to take appropriate action to restore proper operation. The action taken is dependent on the nature of the detected failure and may result in a restart of the BMC CPU, one or more BMC HW subsystems, or a restart of malfunctioning FW subsystems. Revision 1.1 55 Intel order number G24881-004