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cglosser/hdd_fanctl.sh

Created February 5, 2016 15:30
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Revisions

  1. @rayhem rayhem created this gist Feb 5, 2016.
    36 changes: 36 additions & 0 deletions hdd_fanctl.sh
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,36 @@
    #!/bin/bash

    #smartfancontrol.sh

    #### enter your preferred values here ##################
    speed_min=2000 #RPM
    speed_max=5500 #RPM
    temp_min=46 #degrees celsius
    temp_max=60 #degrees celsius

    ########## Do not edit below this line ###################


    while true; do
    echo 1 > /sys/devices/platform/applesmc.768/fan2_manual

    temp=$(/usr/sbin/smartctl -A /dev/sda | grep ^194 | awk '{print $10}')

    if [[ $temp -lt $temp_min ]]; then
    speed=$speed_min
    elif [[ $temp -gt $temp_max ]]; then
    speed=$speed_max
    else
    x=$(($speed_max-$speed_min))
    y=$(($(($temp-$temp_min))*100))
    z=$(($(($temp_max-$temp_min))*100))
    a=$(($x*$y/$z))
    speed=$(($a+$speed_min))
    fi

    echo $speed >/sys/devices/platform/applesmc.768/fan2_output

    printf '[ %i C | %i rpm ]\n' $temp $speed

    sleep 10
    done