Silence your Lenovo IX4-300D’s Fans

The IX4’s fans are quite loud and always spinning the same speed whatever the temperature may be inside your NAS. In this guide I will lower the fan speed and quieten your NAS.

Autoset fan speed on boot

Temperatures can be checked from the WebGui under “System Status”:


Fanspeed can be checked under the “Fan” tab:


3 thoughts on “Silence your Lenovo IX4-300D’s Fans

  1. While slowing the fan down is a nice idea, ideally it would follow the hard drive temperature. The system temperature isn’t terribly important, but keeping your spinning hard drives cool is:
    smartctl -a /dev/sda |grep 194\ Temperature

    194 Temperature_Celsius 0x0002 064 061 000 Old_age Always – 36 (Min/Max 10/39)

    In my IX4, with the fan running at 1610 RPM, my drives report they are at 36/36/35/36C.
    Some afternoon, I’ll hack out a 10 liner bash script that tracks the warmest of the drives unless someone beats me to it.

    • Hi Scott, did you get around to doing that bash script?

      Do we know what the command is to get the CPU temp?

      I’m thinking of croning a script to measure the temperatures and update the pwm1_auto_point1_pwm file if things get to hot.

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