HP Integrated Lights-Out 2 User Guide

Temperaturesfan failure, some fan operation policies might increase the speed of the other fans, record the event in theIML, and turn LED indicators on.Monitoring the fan sub-system includes the sufficient, redundant, and non-redundant configurations of thefans. Fan failure is a rare occurrence, but to ensure reliability and uptime, ProLiant servers have redundantfan configurations. In ProLiant servers that support redundant configurations, fan or fans might fail and stillprovide sufficient cooling to continue operation. iLO 2 increases fan control to continue safe operation ofthe server in the event of fan failure, maintenance operations, or any event that alters cooling of theserver.In non-redundant configurations, or redundant configurations where multiple fan failures occur, the systemmight become incapable of providing the necessary cooling to protect the system from damage and toensure data integrity. In this condition, in addition to the cooling policies, the system might start a gracefulshutdown of the operating system and server.The Fan tab displays the state of the replaceable fans within the server chassis. This data includes thearea cooled by each fan and the current fan speed.The Temperatures tab displays the location, status, temperature, and threshold settings of temperaturesensors in the server chassis. The temperature is monitored to maintain the location temperature below thecaution threshold. If one or more sensors exceed this threshold, iLO 2 implements the recovery policy toprevent damage to server components.• If the temperature exceeds the caution threshold, the fan speed is increased to maximum.• If the temperature exceeds the critical temperature, a graceful server shutdown is attempted.• If the temperature exceeds the fatal threshold, the server is immediately turned off to preventpermanent damage.Monitoring policies differ depending on server requirements. Policies usually include increasing fan speedto maximum cooling, logging the temperature event in the IML log, providing visual indication of the eventusing LED indicators, and starting a graceful shutdown of the operating system to avoid data corruption.After correcting the excessive temperature conditions additional polices are implemented includingreturning the fan speed to normal, recording the event in the IML, turning off the LED indicators, and ifappropriate, canceling shutdowns in progress.PowerThe VRMs/Power Supplies tab displays the state of each VRM or power supply. VRMs are required foreach processor in the system. VRMs adjust the power to meet the needs of the processor supported. AVRM can be replaced if it fails. A failed VRM prevents the processor from being supported.iLO 2 also monitors power supplies in the system to ensure the longest available uptime of the server andoperating system. Power supplies can be affected by the brownouts and other electrical conditions, or ACcords can be accidentally unplugged. These conditions result in a loss of redundancy if redundant powersupplies are configured, or result in loss of operation if redundant power supplies are not in use.Additionally, should a power supply failure be detected (hardware failure) or the AC power corddisconnected, appropriate events are recorded in the IML and LED indicators used.iLO 2 monitors power supplies to ensure that they are correctly installed. This information is displayed onthe System Information page. Reviewing the System Information page and IML will assist you in decidingwhen to repair or replace a power supply, preventing a disruption in service.Using iLO 2 65