Users Guide

Table Of Contents
Custom Enter the percentage value.
The allowable range for minimum fan speed PWM is dynamic based on the system configuration. The first value is the idle
speed and the second value is the configuration max (which may or may not be 100% based on system configuration).
System fans can run higher than this speed as per thermal requirements of the system but not lower than the defined
minimum speed. For example, setting Minimum Fan Speed at 35% limits the fan speed to never go lower than 35% PWM.
NOTE: 0% PWM does not indicate fan is off. It is the lowest fan speed that the fan can achieve.
The settings are persistent, which means that once they are set and applied, they do not automatically change to the default
setting during system reboot, power cycling, iDRAC, or BIOS updates. A few Dell servers may or may not support some or
all of these custom user cooling options. If the options are not supported, they are not displayed or you cannot provide a
custom value.
3. Click Apply to apply the settings.
The following message is displayed:
It is recommended to reboot the system when a thermal profile change has been made. This
is to ensure all power and thermal settings are activated.
Click Reboot Later or Reboot Now.
NOTE: You must reboot the system for the settings to take effect.
Modifying Thermal Settings Using RACADM
To modify the thermal settings, use the objects in the system.thermalsettings group with the set sub command as provided
in the following table.
Object
Description Usage Example
AirExhaustTemp
Allows to set the maximum air exhaust temperature limit.
Set to any of the following values (based on the
system):
0 - Indicates 40°C
1 - Indicates 45°C
2 - Indicates 50°C
3 - Indicates 55°C
4 - Indicates 60°C
255 - Indicates 70°C (default)
To check the existing setting on the system:
racadm get system.thermalsettings.AirExhaustTemp
The output is:
AirExhaustTemp=70
This means that the system is set to limit the air exhaust temperature to 70°C.
To set the exhaust temperature limit to 60°C:
racadm set system.thermalsettings.AirExhaustTemp 4
The output is:
Object value modified successfully.
If a system does not support a particular air exhaust temperature limit, then when you run the
following command:
racadm set system.thermalsettings.AirExhaustTemp 0
The following error message is displayed:
ERROR: RAC947: Invalid object value specified.
Make sure to specify the value depending on the type of object.
For more information, see RACADM help.
To set the limit to the default value:
racadm set system.thermalsettings.AirExhaustTemp 255
48
Setting Up Managed System and Management Station