Forum Discussion

Aspirant

May 29, 2017

Solved

Fan is pulsing in OS 6.7.1 on my Ultra 2

Hi there, lately I updated my ultra2 to the latest firmware (6.7.4 - comming from 6.5.0), since then the fan is pulsing every some seconds. The fan goes within 1 sec from ~700 rpm to 1000 rpm an...

ReadyNAS OS 6 on Legacy models

Skywalker
Jun 01, 2017
I believe we have located the issue. There is a hardware chip that is tasked with controlling the fan speed, and we give it a target RPM. I believe the tolerance range is set too tight for some fans, and when they can't get close enough to the target it results in the pulsing action you described. Next firmware release will relax the tolerace which should resolve it.

cpu8088

Virtuoso

May 30, 2017

select a different setting for fans

or dont sit near the nas.

Pommes
Aspirant
May 30, 2017
1. fan settings have no influence on the pulsing.

2. Not an acceptable solution.
- StephenB
  Guru - Experienced User
  May 30, 2017
  If you enable ssh, you could also try this: https://community.netgear.com/t5/Using-your-ReadyNAS/OS-6-5-2-still-causes-fan-issues-on-the-PRO-6-like-OS-6-5-1-but/m-p/1138003/highlight/true#M115451
  
  That would set the minimum fan speed to 1000 rpm.
  
  This behavior is odd though, I am wondering if other people running OS 6.7.x on their ultra 2s are seeing it.
  - Pommes
    Aspirant
    May 30, 2017
    No, it doesn't help either.
    
    It is still pulsing, but the range is smaller now. It pulses from ~950 to ~1050.
    It's still annoying, because this pulsing happens in less than a second.