Readynas ultra 6 fan replacement

Question

Hello,Got a readynas ultra6. Fan is blowing a very little. I heard that noctua fan is a good choice as replacementDo you have a reference which can be orderedthru amazon ?Thanks !

StephenB · Answer

https://www.amazon.com/gp/product/B00BEZKX8Y

sebcbien31 · Answer

Thanks stephen.I replaced the fan with Noctua NF-A12x25 FLX, https://amzn.eu/d/9BAIVNqTemp is now 72°C instead of 80-ish °CBut when when system fall asleep after few hours fan stop rotating and system temperature rises criticallyHow can I prevent the system to stop the fan in such condition ?

StephenB · Answer

sebcbien31&nbsp;wrote:Thanks stephen.I replaced the fan with Noctua NF-A12x25 FLX, https://amzn.eu/d/9BAIVNqTemp is now 72°C instead of 80-ish °CBut when when system fall asleep after few hours fan stop rotating and system temperature rises criticallyHow can I prevent the system to stop the fan in such condition ?
Not sure what's going on with that - perhaps&nbsp;Sandshark&nbsp;will offer some ideas.
&nbsp;
Is the system cooling set to "cool"&nbsp; Or one of the other two settings?

Sandshark · Answer

The problem with replacing the fan with another brand is that the "stall speed" may be higher, which sounds like your problem.&nbsp; Your fan's minimum speed is higher than the stock one.&nbsp; The fan comes on faster at power-on, and then gets trimmed to the necessary speed to maintain the desired temperature.&nbsp; But the OS is trying to trim your fan to something below it's minimum.&nbsp;The minimum is set in /etc/sensors.d/system.conf.&nbsp; Note that that is a symbolic link to /etc/frontview/sensors/ULTRA66.conf (in your case for an Ultra6).&nbsp; While it seemed to have no effect when I tried it some time ago, other have had success.&nbsp; So I suspect that there is a limit and my trial of 2000 (to insure I could see a difference) was too large.&nbsp; To prevent OS updates from overwriting it, I suggest you replace the link with a real file and make that file read-only once you verify it has worked.

StephenB · Answer

Sandshark&nbsp;wrote:
 Note that that is a symbolic link to /etc/frontview/sensors/ULTRA66.conf (in your case for an Ultra6).&nbsp;

Did you mean ULTRA6.conf ????
&nbsp;
Sandshark&nbsp;wrote:
The problem with replacing the fan with another brand is that the "stall speed" may be higher, which sounds like your problem.&nbsp; Your fan's minimum speed is higher than the stock one.&nbsp; The fan comes on faster at power-on, and then gets trimmed to the necessary speed to maintain the desired temperature.&nbsp; But the OS is trying to trim your fan to something below it's minimum.
&nbsp;

sebcbien31: My Pro 6 doesn't have this issue.&nbsp; The mininum fan speed (fan3_min) is set to 600 in my system.conf file, it appears to be set to 400 in yours.&nbsp; One review I've seen says the minimum speed for your Noctua is 450 rpm.&nbsp;&nbsp;
&nbsp;
I'd probably just increase fan3_min to 600, but you could try 450 first, and see if that is enough.
&nbsp;

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Readynas ultra 6 fan replacement

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