iSR6200 Intelligent Storage Router Installation Guide - QLogic

1–IntroductionPower and Cooling Module (PCM)Each blade is capable of simultaneously driving all six fans in both PCMs.Generally, only one blade controls both fans, running them at a normal speed.However, if the system detects a higher-than-expected temperature on either sideof the blade, it forces the fans to run at full speed. After the temperature is back tonormal, the fans resume running at their normal speed.Table 1-1 shows the internal temperature limits set to trigger events or servermessage block (SMB) alerts.Table 1-1. Internal Temperature Sensor LimitsSensorHigh FanSpeedTemperatureLow FanSpeedRecoveryTemperatureCriticalTemperature(power off)SMB_AlertRecoveryTemperatureFront 60°C 55°C 70°C 55°CRear 45°C 40°C 55°C 45°CCPU1 60°C 55°C 68°C 55°CCPU2 60°C 55°C 68°C 55°CThe following describes the fan speed and temperature parameters listed inTable 1-1.• High Fan Speed Temperature—When a sensor detects a temperature thatexceeds this value, the fans run at their maximum RPM speed. The systemlogs the event and the system fault LED blinks five times every two seconds.• Low Fan Speed Recovery Temperature—When the fans are running attheir maximum RPM and all sensors report values less than this value, thefan speed resets to normal.• Critical Temperature—When a sensor detects a temperature that exceedsthis value, the system powers down the blade. When this happens, theCPUs enter sleep state 5. The system sets the peripheral componentinterface (PCI) power state of capable devices to D3, and then turns off thepower supplies not essential to wake up the CPUs. When the temperaturegoes below the Recovery Temperature value, the sensor that reported theover-temperature value generates an SMB_ALERT.• Recovery Temperature—Value at which a sensor generates anSMB_ALERT to wake up the CPU and cause the blade to reboot.1-4 ISR651101-00 G