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}"
esac4. 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 
.
Post if you have questions
Model: RN10200|ReadyNAS 100 Series 2-Bay (Diskless),RN10400|ReadyNAS 100 Series 4-Bay (Diskless)
