proxmox_fan_controller

Systems supporting ipmitool can utilize this approach.

This approach has worked for me, and without buying new expensive quiet fans this will make your home-lab server quiet.

This has been tested on the Supermicro AS -E301-9D-8CN4 with Proxmox 8.3.3 (as of Jan 2025)

Requirements:

• Proxmox (Deb12)
• ipmitool

The approach

This approach relies of direct communication with the management interface to set fan speed. and it sets it on boot, and I setup a script to react to temperature change to avoid blowing it up.

How it works?

It relies on the use of ipmitool to interact with the SuperMicro BMC (Baseboard Management Controller)

and luckily I found some people who had already pinpointed the right codes see here

Heres an example of the command which worked on my system:

ipmitool raw 0x30 0x70 0x66 0x01 0x00 0x10

the last digit appears to control the speed of all three fans so 0x10 might be 10%, but one of the Posters suggests 0x08 was 8% and 0x20 was full speed so you'll have to decide for yourselves.

enable_at_boot

Refer to this document to see how you can ensure the quiet speed is set at boot.

react_to_temp_change

Refer to this to see how Im ensuring it can speed up if it has to.

Graphing

Theres a very simple graphing library to see how your CPU/fan speeds are going.

see data_analysis/data_analysis.py

just put your logs into data.txt in the same folder or re-point the input_file variable.