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--- fan_control [2025/10/15 19:12]
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+++ fan_control [2025/10/15 19:19] (current)
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-===Limulus Fan Control===
+=====Limulus Fan Control=====
 There are two fans that pull air from under the case. The fans are directly under the blades and ensure there is adequate airflow to the blade CPUs.
-The fans are connected to the main motherboard auxiliary fan connectors. A daemon, called ''limfanctl'' reads the blade temperatures and adjusts the fan speeds (based on the highest blade temperature) using the ''fancontrol'' daemon (part of the the lm_sensors package).
+The fans are connected to a single main motherboard auxiliary fan connector using a "Y" power splitter. A daemon, called ''limfanctl'' reads the blade temperatures and adjusts the fan speeds (based on the highest blade temperature) using a specifically configured ''fancontrol'' daemon (part of the the lm_sensors package). The ''limfanctl'' daemon is managed by ''systemd'' and will automatically start and stop the ''fancontrol'' daemon.
 In addition, the ''limfanctl'' will monitor individual node CPU temperatures and if they exceed a user defined threshold (see below), the processor turbo-mode is turned off until the temperature goes below the threshold.
-Individual processor fans are controlled by the node motherboard BIOS.
+Individual processor fan speeds are controlled by the node motherboard BIOS.
-The file ''/etc/limfanctl/limfanctl.conf'' can be uses to set the turbo-mode throttling. The settings are described in the ''limfanctl.conf'' file reproduced below.
+The file ''/etc/limfanctl/limfanctl.conf'' can be uses to set the turbo-mode throttling. The settings are described in the ''limfanctl.conf'' file reproduced below. A debug log can be enabled by setting the ''DEBUG'' variable.
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