The minimum viable fan control script
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The minimum viable fan control script
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Re: The minimum viable fan control script
#2I was expecting a basic thermostat with hysteresis, but no, it's a stepwise proportional control. Your fan could very well wind up oscillating at one of the step transition points which is probably not great for the fan.
Re: The minimum viable fan control script
#3There is no need to call cat to read from a file.
> temp=$(cat /sys/class/thermal/thermal_zone1/temp)
temp=$(</sys/class/thermal/thermal_zone1/temp)
Re: The minimum viable fan control script
#4As an alternative, been using this PID fan control script to keep my HDDs cool for ages. https://forums.freenas.org/index.php?threads/pid-fan-control...
Re: The minimum viable fan control script
#5There is no need to call cat to read from a file. > temp=$(cat /sys/class/thermal/thermal_zone1/temp) temp=$(</sys/class/thermal/thermal_zone1/temp)
A classic example of cat abuse in my book.
Re: The minimum viable fan control script
#6As an alternative, been using this PID fan control script to keep my HDDs cool for ages. https://forums.freenas.org/index.php?threads/pid-fan-control...
I've some a similar thing with my NAS on a Supermicro X10 (I think) on Linux. I have had all kinds of trouble getting quiet fans on this board under Linux. I think it's a mix of BIOS fan control and other things that I ended up sinking days into trying to solve. Right now my solution is flaky at best, but eventually the fans spin down after a reboot.
Supermicro could be so good for "prosumers" but I feel like they are bogged down by historic garbage. I had to pay (crack) something in the BIOS just to use a feature.
Re: The minimum viable fan control script
#7No post body was provided.
Re: The minimum viable fan control script
#8As an alternative, been using this PID fan control script to keep my HDDs cool for ages. https://forums.freenas.org/index.php?threads/pid-fan-control...
Me too! And it does not only keep HDDs cool but even more importantly it keeps them at a constant temperature. At this point the script should be shipped with TrueNAS directly.
Re: The minimum viable fan control script
#9I have spent countless hours trying to get hardware to be silent.
The only way to do this reliably and without fire hazard is to passively cool the hardware completely by having HUGE heatsinks and THEN you can add a fan that you slow down with a resistor.
The fan is only there to prolong the life span, the hardware should be able to run passivley at 100% and you should be able to hold your finger on the heatsink forever. If not you have a problem.
All other solutions are just meaningless.
Re: The minimum viable fan control script
#10> if ((temp > 90000)); then
What is this syntax? I would have assume something like `[ $temp -gt 90000 ]` or `$((temp > 90000))`. Is the dollar here optional? Is this something bash specific?