Users Guide

– Default — Sets minimum fan speed to default value as determined by the system cooling algorithm.
– 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.
Table 8. Thermal Settings
Object Description Usage Example
AirExhaustTemp
Allows you 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.thermalsetting
s.AirExhaustTemp
The output is:
AirExhaustTemp=70
This output indicates 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.thermalsetting
s.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.thermalsetting
s.AirExhaustTemp 0
51