I've been running esxi 6.7 on this for 3+ years, zero issues until now. Large case with big, relatively slow-spinning fans in the top, and door panel, as well as the typical, smaller fan on the back. For the last couple of weeks, I keep getting vsphere health alerts, where the fan cycles from 400rpm (OK) to 300 (WARNING), then 0 (CRITICAL). At some point, it goes OK again. The transitions seem to be 5 minutes apart, although I don't know if that's just the poll interval vsphere uses. Is it the fan? The BMC? VSphere? Nothing bad seems to be happening, but the spamming of alerts is getting annoying...
X10DRL-i - 1 fan keeps spinning down and then back up?
- Thread starter dswartz
- Start date
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Hmmm, seems the BMC is not doing the right thing? Set to max speed, and fan1 still says 300 rpm? Although back to 400 rpm now. I'll keep an eye out. If that doesn't stick, maybe move that fan to a different header? Or just unplug it - everything runs nice and cool, and that fan is the lowest speed one. Thanks for the help!
to low, you have to set the lower treshold of the BMC to 250rpm to prevent panic mode or use a FANs that spins higher.
This is a big-ass fan in the top of the case. It's designed to spin relatively slowly. All of this begs the question: why was this fan+mobo working fine for 3+ years and now starts cycling up and down. AFAICT, 400 rpm IS the max this fan runs at. So why is it slowing down? Maybe the fan mode of optimal speed (I never set that - must have been the default) was too low? I have it set for full speed now, and will be watching for more glitches. Both cpus run well under 30C, so if needs be, I'll just unplug that fan entirely - there's plenty of airflow... Also, indication of an issue: regardless of anything else, turning the fan off entirely seems wrong, no? And this is the pattern: 400 => 300 => 0 and repeat...
maybe the FAN stops sending pulses, its a 3 pin right ? this are Voltage regulated.
all stuff gets older. if the treshold was 300 and the FAN 302, but now after years...
I'm not sure I'm understanding. The fan is actually stopping, so I'm less worried about panic mode than WTF is wrong with the fan. I do think your previous post that the fan HW might be flaking out is on point. For now, to avoid nuisance emails, I unplugged that fan, and everything is still running nice and cool.