More on CPU specs of the ReadyNAS Pro

Hi Korky,

They would if I let them. :-)

My SYS fan never turns off.

The CPU fan I have has a higher turn-on voltage than the stock fan that came with my unit, so when idle the fan would indeed turn off. That made me nervous because the readynas would not really try to turn the fan back on until the CPU temp was at 45º or more. I preferred the additional fan noise to having the CPU at unnecessary high temps.

Therefore I added this script to keep the fan running even at idle ( I think it is at runlevel 2, don't have the info at hand):

#! /bin/sh
#
# Calibrate W83627ehf driver for controlling Silverstone FM83 fan
# on PWM2
#

# Start Voltage - 6V according to FM83 datasheet. Around 1500 RPM
# We try a higher value to ensure the fan starts reliably
echo 140 > /sys/devices/platform/w83627ehf.2576/pwm2_start_output

# Stop Voltage - empirically shown to be around 5.5V,
# lower than this and the fan may not stay on reliably
echo 122 > /sys/devices/platform/w83627ehf.2576/pwm2_stop_output

# Set PWM2 to Manual Mode so we can edit the current output value
echo 1 > /sys/devices/platform/w83627ehf.2576/pwm2_enable

# Set output to start value
echo 140 > /sys/devices/platform/w83627ehf.2576/pwm2

usleep 100000

# Restore Auto Mode
echo 2 > /sys/devices/platform/w83627ehf.2576/pwm2_enable

exit 0