How to control fanspeed on a RN104 for 6.7.4

Updating an old script to control the fan speed on the newer Firmware. I am not claiming credit all i did was update the sys path for the new frimware and change the startup script that had a typo 

originally came from post https://community.netgear.com/t5/New-to-ReadyNAS/How-to-control-fanspeed-on-a-RN104/td-p/911970

1. First you create a file in /root with the name fanoverride.sh. Put the following lines in to the file.

nano /root/fanoverride.sh

#!/bin/bash

## Variables ##
FANPWMPATH=/sys/devices/platform/soc/soc:internal-regs/d0011000.i2c/i2c-0/0-003e/hwmon/hwmon0/fan1_target
FANSPEEDPATH=/sys/devices/platform/soc/soc:internal-regs/d0011000.i2c/i2c-0/0-003e/hwmon/hwmon0/fan1_input
CORETEMPPATH=/sys/devices/virtual/thermal/thermal_zone0/temp

MAXFAN=3500   # Maximum operable speed
MINFAN=700     # Minimum operable speed

MINTEMP=35000 #35 C
MAXTEMP=70000 #70 C
NEWSPEED=1000  # Initial fan speed (%)

## Functions ##
function getReadings {
        FANPWM=$(cat $FANPWMPATH)
        FANSPEED=$(cat $FANSPEEDPATH)
        CORETEMP=$(cat $CORETEMPPATH)
        }

function setFanSpeed {

        TEMPFAN=$(expr $MAXFAN - $MINFAN)
        NEWFAN=$(expr $TEMPFAN \* $NEWSPEED)
        NEWFAN=$(expr $NEWFAN / 100)
        NEWFAN=$(expr $NEWFAN + $MINFAN)
        if [ $NEWFAN -lt $MINFAN ]; then
                NEWFAN=$MINFAN
                fi
        if [ $NEWFAN -gt $MAXFAN ]; then
                NEWFAN=$MAXFAN
                fi

        echo New Speed: $NEWFAN RPM

        echo $NEWFAN > $FANPWMPATH
        }

function calcFanPercent {
        TEMPRAN=$(expr $MAXTEMP - $MINTEMP)
        TEMPREL=$(expr $CORETEMP - $MINTEMP)
        TEMPREL=$(expr $TEMPREL \* 100)
        TEMPPER=$(expr $TEMPREL / $TEMPRAN)
        NEWSPEED=$TEMPPER
        echo New Speed Set: $NEWSPEED % at $(date +%T)
        }


###################################################################
echo "Automatically controlling fan speed..."
while true
        do
                getReadings
                echo "Temp: $CORETEMP C FAN: $NEWSPEED% [$FANSPEED RPM] [PWM $FANPWM]"

                calcFanPercent
                setFanSpeed

                sleep 5
        done
###################################################################

2. Now chmod 755 /root/fanoverride.sh

chmod 755 /root/fanoverride.sh

3. Now create a file in /etc/init.d with the name fanoveride.

nano /etc/init.d/fanoverride

#!/bin/sh
### BEGIN INIT INFO
# Provides: FanOveride
# Required-Start: $local_fs $network $named $time $syslog
# Required-Stop: $local_fs $network $named $time $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Description: FanOveride overides the default ReadyNAS fan control
### END INIT INFO
SCRIPT=/root/fanoverride.sh
RUNAS=root
PIDFILE=/var/run/fanoveride.pid
LOGFILE=/var/log/fanoveride.log
start() {
if [ -f /var/run/$PIDNAME ] && kill -0 $(cat /var/run/$PIDNAME); then
echo 'Service already running' >&2
return 1
fi
echo 'Starting service.' >&2
local CMD="$SCRIPT &> \"$LOGFILE\" & echo \$!"
su -c "$CMD" $RUNAS > "$PIDFILE"
echo 'Service started' >&2
}
stop() {
if [ ! -f "$PIDFILE" ] || ! kill -0 $(cat "$PIDFILE"); then
echo 'Service not running' >&2
return 1
fi
echo 'Stopping service.' >&2
kill -15 $(cat "$PIDFILE") && rm -f "$PIDFILE"
echo 'Service stopped' >&2
}
uninstall() {
echo -n "Are you really sure you want to uninstall this service? That cannot be undone. [yes|No] "
local SURE
read SURE
if [ "$SURE" = "yes" ]; then
stop
rm -f "$PIDFILE"
echo "Notice: log file is not be removed: '$LOGFILE'" >&2
update-rc.d -f <NAME> remove
rm -fv "$0"
fi
}
case "$1" in
start)
start
;;
stop)
stop
;;
uninstall)
uninstall
;;
restart)
stop
start
;;
*)
echo "Usage: $0 {start|stop|restart|uninstall}"
esac

4. Now make sure it is executable

chmod +755 /etc/init.d/fanoverride

5. Make it start at boot or start it manually

#auto start with system
update-rc.d fanoverride defaults
#manually
service fanoverride start
service fanoverride stop

Use at you own risk and its not my fault if you break your NAS or burn your house down :smileyhappy:.

Post if you have questions