HP Integrated Lights-Out 4 User Manual
Page 151
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 event
of a fan failure, some fan operation policies might increase the speed of the other fans, record the
event in the IML, or turn LED indicators on.
Monitoring the fan subsystem includes the sufficient, redundant, and nonredundant fan
configurations. If one or more fans fail, the server still provides sufficient cooling to continue
operation.
In nonredundant configurations, or redundant configurations where multiple fan failures occur, the
system might be incapable of providing sufficient cooling to protect the system from damage and
to ensure data integrity. In this case, in addition to the cooling policies, the system might start a
graceful shutdown of the operating system and server.
To view fan information, navigate to the Information
→System Information page, and then click
the Fans tab.
The information displayed on this page varies depending on the server type.
If the server is powered off, the system health information on this page is current as of the last
power off. Health information is updated only when the server is powered on and POST is complete.
The following information is displayed:
•
Rack servers—The following information is displayed for each fan in the server chassis:
Location
◦
◦
Status
◦
Speed
shows the Fan Information page for a rack server.
Figure 73 System Information – Fan Information page for rack servers
•
Blade servers—ProLiant c-Class server blades use the enclosure fans to provide cooling because
they do not have internal fans. The enclosure fans are called “virtual fans” on this page. The
virtual-fan reading represents the cooling amount that a server blade is requesting from the
enclosure. The server blade calculates the amount of cooling required by examining various
temperature sensors and calculating an appropriate fan speed. The enclosure uses information
Viewing iLO system information
151