Forum Discussion

Star

Apr 26, 2019

Solved

Readynas Pro 6 (OS 6) Fan Control with Noctua System Fan stops

I was given a ReadyNas Pro 6 and upgraded it to OS 6 (latest firmware). I soon replaced the Crown system fan with a Noctua NF-A12x25FLX 3-pin, to get efficient and relatively quiet cooling. The Noctua is plugged in to the same socket on the network card that the Crown came from.

The problem I have is that on occasion the system fan spins down to 0rpm and won't start. The Readynas issues a warning that fan speed is below minimum and - eventually - if I leave the system it will get hot and shut itself down.

I don't know if the problem would have occurred with the original Crown fan. I would prefer not to put the Crown back in. I am wondering if there is a known issue here that I can address or not. I've read related posts on the forum but this issue doesn't seem to be addressed by those posts.

Any help gratefully received!

Supertramp11
May 13, 2019
This thread also mentions the fan speed override: https://community.netgear.com/t5/Using-your-ReadyNAS-in-Business/OS-6-5-2-still-causes-fan-issues-on-the-PRO-6-like-OS-6-5-1-but/m-p/1138003#M115451

Let us know if this works...

14 Replies

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Equinox1
Guide
Apr 27, 2019
If I remember correctly, the noctua fans need something done to the cables to work
- jolo2
  Star
  Apr 27, 2019
  Equinox1 wrote:
  If I remember correctly, the noctua fans need something done to the cables to work
  
  Thanks. I'm aware of discussion about the PSU fan wiring and also about the CPU fan needing to be a four pin, but I *thought* the Crown system fan is a 3-pin and so is this Noctua and I thought that this means they would be a standard connection and interchangeable? Can we confirm/deny whether the Crown/Noctua are interchangeable?
  
  The strange thing here is that the system runs just fine, but - inexplicably - either just after boot, or a few hours (or days) after boot, the fan will stop. It seems like something in software must be changing and - once changed - only a reboot will fix it.
  - Sandshark
    Sensei - Experienced User
    Apr 28, 2019
    Your problem is that your fan's minimum speed is higher than the stock one. The fan comes on faster at power-on, and then gets trimmed to the necessary speed to maintin the desired temperature. But the OS is trying to trim your fan to something below it's minimum..
    
    When they added the ability to select cool, balanced. or quiet for the fan setting, they seem to have removed the way to set the minimum speed. It's not in the usual places, anyway. Neither changing the min fan speed in system.conf nor adding a min_fan_speed_override file work.
    
    While it likely flies in the face of why you changed the fan, you can try using the "cool" setting.