ReadyNAS Pro: System temp running out of spec

@chirpa: Would like to do the test with 4.2.11, but please give me any advice if i have to care about anything before/while downgrading. Thanks again for your help!

i havent had any issues downgrading to 4.2.11.
so i think you wont have any issues either.

I did the test and downgraded to 4.2.11 in order to compare it to 4.2.13:

a) Behaviour of the cpu fan is the same. It maxes out at around 1.500 rpm
b) Behaviour of the sys fan is way different: with 4.2.11 it rotates at around 1.900 rpm after calibration in comparison to 1.100 rpm with 4.2.13!

Because of the higher rpm of the sys fan when using 4.2.11 the whole system is about 6-7 degrees cooler and so temps are not running out of specs!

Finaly two things are being curious to me:
a) Why does the cpu fan generally max out at around 1.500 rpm?
b) Why does the sys fan rotate with about 70% more speed unter 4.2.11 in comparison to 4.2.13?

Additional info: 4.2.12 shows the same behaviour as 4.2.13. So there seems to be a change between 4.2.11 and 4.2.13 in the calibration of the sys fan!

So only workaround for me today:
a) downgrade to 4.2.11
b) calibrate sys fan
c) upgrade to 4.2.13

@Chirpa: Hope that helps to fix things?!

@Chirpa:
I just asked a friend of mine who also owns a readynas pro with 4.2.13. At the moment i spoke to him his cpu fan was rotating at 2136 rpm!
But why is the cpu fan in my readynas pro maxing out at around 1500 rpm even if the cpu temperature runs out of specs?
Any idea? I really would like to avoid any kind of hardware damage because of too high cpu temperature!

Thanks in advance for help!

TheMule!

It could be CPU FAN it self that can't go more than 1500RPM. is there anyway could you take a picture of the CPU FAN?

I don't think that this is the reason for the issue, because during startup the cpu fan is much louder and raidar shows it running at a minimum of 2000 rpm during boot...

Add me to the list of affected units. I never had this warning before I upgraded to 4.2.12-T32 from 4.2.11. Since then I've tried various 4.2.12 and 4.2.13 releases. All of them raise this warning about once a week for me.

So any advice what to do? I'm scared about the fact that the cpu is permanently running near or above spec limit. What does it mean in regards of it's lifetime? Whill it be shortened?

So please give us any advice what to do or please give us some kind of information if you're just in the process of evaluating this issue.

Once again: Thanks in advance!

We are looking into the issue and stay tune :)

I can't seem to reproduce the issue. All my Pro CPU FAN running at 2000+RPM.