I have noticed the drives in my PR4100 are running hotter than the ones in my EX4100, granted they are much larger capacity drives so could run naturally warmer. I did some digging and found the following file is used for monitoring temperature: /etc/wd/BNFA-thermal.xml
What’s interesting is the EX4100 equivalent uses very different values with regards to the temperature.
PR4100 snippet:
step name=“init_drv_cool” action=“set_int_value” var=“drv_state” value=“1” interval=“600” next=“check_drv_extreme”
step name=“check_drv_extreme” action=“compare_temperature” source=“drive” index=“" comparison=“greater_than” value=“74.0” interval=“600” goto=“set_drv_extreme” next=“check_drv_pending”
step name=“check_drv_pending” action=“compare_temperature” source=“drive” index="” comparison=“greater_than” value=“71.0” interval=“600” goto=“set_drv_pending” next=“check_drv_danger”
step name=“check_drv_danger” action=“compare_temperature” source=“drive” index=“" comparison=“greater_than” value=“67.0” interval=“600” goto=“set_drv_danger” next=“check_drv_hot”
step name=“check_drv_hot” action=“compare_temperature” source=“drive” index="” comparison=“greater_than” value=“64.0” interval=“600” goto=“set_drv_hot” next=“check_drv_warm”
step name=“check_drv_warm” action=“compare_temperature” source=“drive” index=“" comparison=“greater_than” value=“57.0” interval=“600” goto=“set_drv_warm” next=“check_drv_content”
step name=“check_drv_content” action=“compare_temperature” source=“drive” index="” comparison=“greater_than” value=“50.0” interval=“600” goto=“set_drv_content” next=“check_drv_under”
step name=“check_drv_under” action=“compare_temperature” source=“drive” index=“" comparison=“less_than” value=“1.0” interval=“600” goto=“set_drv_under” next=“check_drv_cool”
step name=“check_drv_cool” action=“compare_temperature” source=“drive” index="” comparison=“less_than” value=“51.0” interval=“600” goto=“set_drv_cool” next=“check_cpu_shutdown”
EX4100:
step name=“init_drv_cool” action=“set_int_value” var=“drv_state” value=“1” interval=“570” next=“check_drv_extreme” />
step name=“check_drv_extreme” action=“compare_temperature” source=“drive” index=“" comparison=“greater_than” value=“74.0” interval=“570” goto=“set_drv_extreme” next=“check_drv_pending”
step name=“check_drv_pending” action=“compare_temperature” source=“drive” index="” comparison=“greater_than” value=“71.0” interval=“570” goto=“set_drv_pending” next=“check_drv_danger”
step name=“check_drv_danger” action=“compare_temperature” source=“drive” index=“" comparison=“greater_than” value=“67.0” interval=“570” goto=“set_drv_danger” next=“check_drv_hot”
step name=“check_drv_hot” action=“compare_temperature” source=“drive” index="” comparison=“greater_than” value=“64.0” interval=“570” goto=“set_drv_hot” next=“check_drv_warm”
step name=“check_drv_warm” action=“compare_temperature” source=“drive” index=“" comparison=“greater_than” value=“40.0” interval=“570” goto=“set_drv_warm” next=“check_drv_content”
step name=“check_drv_content” action=“compare_temperature” source=“drive” index="” comparison=“greater_than” value=“37.0” interval=“570” goto=“set_drv_content” next=“check_drv_under”
step name=“check_drv_under” action=“compare_temperature” source=“drive” index=“" comparison=“less_than” value=“1.0” interval=“570” goto=“set_drv_under” next=“check_drv_cool”
step name=“check_drv_cool” action=“compare_temperature” source=“drive” index="” comparison=“less_than” value=“38.0” interval=“570” goto=“set_drv_cool” next=“check_cpu_shutdown”
On the EX4100 drives are considered warm if they are greater than 40 degrees, I am assuming this is Celsius. On the PR4100 drives are considered warm when they are greater than 57 degrees, that’s quite a large difference. What I want to know is are these config files being used to control the fan speed based off the temperature? If they are used to control the temperature it would explain why my drives got to 56c yesterday when running a full system test which I cancelled as I wasn’t comfortable with how hot the drives got. I identified the configuration files used by checking the log file /var/log/wdhwlib.log on both units. Can someone confirm if their PR4100 thermal file has the same values as mine? Firmware version for the PR4100 is
2.41.116, EX4100 has version 2.40.157.
