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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...
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.
1. fan settings have no influence on the pulsing.
2. Not an acceptable solution.
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.
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.
Pommes wrote:
It's still annoying, because this pulsing happens in less than a second.
I'm thinking the fan might be failing.
If an update brakes a fan, than halleluja.
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.
Great, I'm looking forward for this release.
Best regards,
Patrick
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