HP Integrated Lights-Out 2 - Manual (Page 76)

(ability to handle a failure). The subsystems can include fans, temperature sensors, power supplies,
and voltage regulator modules.
•
Fans – Displays the state of the replaceable fans in the server chassis. This data includes the
area that is cooled by each fan and current fan speeds.
•
Temperatures – Displays the temperature conditions monitored at sensors in various locations
in the server chassis, and the processor temperature. The temperature is monitored to maintain
the location temperature below the caution threshold. If the temperature exceeds the caution
threshold, the fan speed is increased to maximum.
•
VRMs – Displays VRM status. A VRM is required for each processor in the system. The VRM
adjusts the power to meet the power requirements of the processor supported. A failed VRM
prevents the processor from being supported and must be replaced.
•
Power Supplies – Displays the presence and condition of installed power supplies.
OK – Indicates that the power supply is installed and operational. —
— Unpowered – Indicates that the power supply is installed, but not operational. Verify that
the power cord is connected.
— Not present – Indicates that the power supply is not installed. Power is not redundant in
this condition.
— Failed – Indicates that the power supply must be replaced.
To access the Summary tab from other areas of the iLO 2 interface, click System Status>System
Information>Summary.
Fans
iLO 2, in conjunction with additional hardware, controls the operation and speed of the fans. Fans
provide essential cooling of components to ensure reliability and correct operation. Fan location,
placement, design and speed control take into account various temperatures monitored throughout
the system to provide appropriate cooling with minimal noise levels.
Fan operation policies might differ from server to server based on fan configuration and cooling
demands. Fan control takes into account the internal temperature of the system, increasing the fan
speed to provide more cooling, and decreasing the fan speed if cooling is sufficient. In the unlikely
event of a fan failure, some fan operation policies might increase the speed of the other fans,
record the event in the IML, and turn LED indicators on.
Monitoring the fan sub-system includes the sufficient, redundant, and non-redundant configurations
of the fans. Fan failure is a rare occurrence, but to ensure reliability and uptime, ProLiant servers
have redundant fan configurations. In ProLiant servers that support redundant configurations, fan
or fans might fail and still provide sufficient cooling to continue operation. iLO 2 increases fan
control to continue safe operation of the server in the event of fan failure, maintenance operations,
or any event that alters cooling of the server.
In non-redundant configurations, or redundant configurations where multiple fan failures occur,
the system might become incapable of providing the necessary cooling to protect the system from
damage and to ensure data integrity. In this condition, in addition to the cooling policies, the
system might start a graceful shutdown of the operating system and server.
The Fan tab displays the state of the replaceable fans within the server chassis. This data includes
the area cooled by each fan and the current fan speed.
Temperatures
The Temperatures tab displays the location, status, temperature, and threshold settings of temperature
sensors in the server chassis. The temperature is monitored to maintain the location temperature
76 Using iLO 2