Upgraded PRO 6 to 6.5.1, had fan problems, went back to 6.5.0 and all is well again

Just to clarify - did you install the released 6.5.1 or 6.5.1-RC1?

I am having issues which have been reported as being v5.5.1 related other than the fan.

I see lots of talk about rolling back to 6.5.0, but no instructions as to where to get the firmware.

Could someone please post a link?

Regards!

I am in need of some help with my Pro 6.  I've upgraded from 4.2.28 to 6.5.1 without any issues other than my CPU fan reporting as 0rpm as I have moved the fan to the additional system fan header.  I've managed to find some topics on how to fix it, however if I then label the 'System' fan as 'CPU' my fan will run at it's max speed no matter what setting I have it on.  Whereas my system fan barely raises it's speed no matter the setting or how hot the sensor is reading.  

Am I better off just leaving them both labled as system fans or will this cause other issues with them not spinning at the correct RPMs???

I've also just rolled back to version 6.5.0 and I'm still seeing the same issue.

below is a copy of my /etc/sensors.d/system.conf

chip "coretemp-isa-0000"
        label temp2 "CPU"
        ignore temp3
        ignore fan2

chip "w83627dhg-isa-*"
        label in1 "DDB18"
        set in1_min 1.62
        set in1_max 1.98
        label in2 "AVCC"
        set in2_min 3.3 * 0.90
        set in2_max 3.3 * 1.10
        label in3 VCC3
        set in3_min 3.3 * 0.90
        set in3_max 3.3 * 1.10
        label in4 VCC1_25
        set in4_min 1.17
        set in4_max 1.32
        label in5 "VCC1_5"
        set in5_min 1.41
        set in5_max 1.58
        label in6 "VCC1_05"
        set in6_min 0.98
        set in6_max 1.10
        set in7_min 3.3 * 0.90
        set in7_max 3.3 * 1.10
        set in8_min 3.0 * 0.90
        set in8_max 3.3 * 1.10
        label fan1 "System"
        set fan1_min 600
        label fan2 "System"
        set fan2_min 600
        label fan3 "CPU"
        set fan3_min 150
        ignore fan4
        ignore fan5
        label temp1 "System"
        set temp1_max 80
        ignore temp2
        ignore temp3
        ignore cpu0_vid
        ignore intrusion0
        ignore fan2

Just want'ed to give my experience as well. Same observations - same problems here.

My ReadyNAS turned itself off twice after installing 6.5.1 - after inspecting the log files it turnes out that one of the fans was turned off because it lost contact with it - and then the system of course overheated and turned it self off.

I thought I had a faulty fan - or that my modified fans (Noctua-NF-F12/Noctua-NF-R8) was not supported anymore :-(

Then I found this thread - and after rolling back to 6.5.0 everything runs smothly again.

(except that I get prompted if I want to upgrade each time I log on to the webinterface)

Just upgraded from 4.x to 6.5.2, one of the fans keeps switching on and off (or high/low speed).

When downgrading to 6.5.0 everything solved.

Model ReadyNas Ultra 6 Pro

I just installed 6.6.0 on my Ultra 6. The fan speed is fluctuating continuously, even while booting and the fans run on max speed. This didn't happen on version 6.5.0 while the I had the same issue on 6.5.1 and 6.5.2. temps are quite normal (cpu 35C system 40C). Everything else is working fine.

Strange thing is, now I’m writing this and the device is running for approximately 40 minutes, the fan speed suddenly is running smooth. After this I rebooted the device, while rebooting and the fans are running on max speed it started fluctuating again. After it fully booted, the fan speed is still fluctuating on lower speed.

Is there anything I can do about this?

Edit: now the fans run normal 11 mins after booting