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Hello,

How can i control the speed fan of my nas?

I already tryed with:

Code: Select all

echo 5 > /sys/devices/platform/mv64xxx_i2c.0/i2c-0/0-003e/hwmon/hwmon0/pwm1 >/dev/null 2>&1

And is working fine, but for a few time. Even tried on cron-boot, without success.

After few time, back to full speed.

I would like to tune how the speed fan rise up deppending on HDD or motherboard temperature.
Where are the conf or script to control that?

Thanks!

Hi

There is already a daemon which manages the fan. So you have all the time the full speed that would mean there is an issue somewhere

Can you post these commands

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 ps ax -o command|grep fan
ls -al /usr/sbin/fan-d
ls -l /bin_cab/fan5big
/usr/sbin/hdstatus-spd sda
/usr/sbin/hdstatus-spd sdb


Hi,

It doesn't always operate at 100%, it starts and stops.
But I'd like it to slow down when working.
At least as long as the temperature is below 50°C. For example:

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root@fvdwsl-base:/ # ps ax -o command|grep fan
/usr/sbin/fan-d 49
grep fan

root@fvdwsl-base:/ # ls -al /usr/sbin/fan-d
lrwxrwxrwx  1 root root 16 2025-07-25 02:08 /usr/sbin/fan-d -> /bin_cab/fan5big

root@fvdwsl-base:/ # ls -l /bin_cab/fan5big
-rwxr-xr-x  1 root root 9232 2020-09-21 17:07 /bin_cab/fan5big

root@fvdwsl-base:/ # /usr/sbin/hdstatus-spd sda
fvdw-hdinfo-vs3 device=/dev/sda status=active temp=47 maxtemp=51 maxtemplife=51

root@fvdwsl-base:/ # /usr/sbin/hdstatus-spd sdb/usr/sbin/hdstatus-spd sdb
fvdw-hdinfo-vs3 device=/dev/sdb status=standby temp=43 maxtemp=47 maxtemplife=49

There is already a daemon which manages the fan. So you have all the time the full speed that would mean there is an issue somewhere

Where are the config files for the daemon? has it?

thank you.

Hi

The daemon does not use a config file. You can only change the threshold of the temperature by setting a custom value in the file /rw_fs/etc/fand. But you already uses it as the current value used by the daemon on your nas is 49° which is not the default value

Hi,

How the daemon scale up the speed fan?
When trigger desired temperature rise the speed fan to 100%?
Or have some levels?

Is very noisy and not needed to be at 100% all time.

Did u know what is the daemon name/path/check period?

If no other way, i´m planning on putting a cron each 5 min to rewrite the value, maybe depending on hdd temp too.

Any better idea?

Thanks.

Hi

Please to note the temperature of the box is significantly cooler than that of the discs. So do not take the temperature of the box as a reference.
The default threshold used by the fan is 47° and it checks discs temperature every 10min and according to tit, speed fan (value to control it) is :
When temp is 1 oC above threshold speed is set to 75, if it is 2 oC it will be 100 and when 3 degrees 150 and 5 degrees 250. (Max speed value is 255)

Maybe the problem are with the values...

That one are the value set by the daemon.

Code: Select all

cat /sys/devices/platform/mv64xxx_i2c.0/i2c-0/0-003e/hwmon/
hwmon0/pwm1
125


I didn´t notice difference between 20, 100 or 250
Fan noise above 20 was the same in my case. I don´t know how te read rpm.

speed fan (value to control it) is :
When temp is 1 oC above threshold speed is set to 75, if it is 2 oC it will be 100 and when 3 degrees 150 and 5 degrees 250. (Max speed value is 255)

Any way to change values to:
1 oC above threshold: 5
2 oC above threshold: 10
3 oC above threshold: 15
4 oC above threshold: 250

Thanks