any Supermicro IPMI SDR help please?

[Hetz Ben Hamo]

Hi,
I have the Supermicro H11 motherboard with EPYC Rome, and I've connected 3 Arctic P8 PWM PST fans. These fans are going up to 3000 RPM.

No matter what I did, it mostly didn't recognize that there are fans, it just recognized the fan in FAN5 connector

The problem: the IPMI really doesn't like the values in the FAN5: it's red in the sensor reading page, and the status switches all the time between Upper Non Recoverable, (2900) Lower Non Recoverable (600 RPM), and IIRC correctly, it also switch to Upper critical (2800 RPM)

I tried setting the values:

- Upper - 1200,2400,2900
- Lower - same

Are there any values to "satisfy" the IPMI? I can delete the sensor (-sdr del) but so far it does a pretty good job at cooling the system.

 

[ericloewe]

Wait, you set the lower limits to the same values as the upper limits? How'd you expect that to ever work?

These are limits, you set them so that a nominal fan does not hit them on either end.

 

[RolloZ170]

Arctic P8 PWM PST

this FAN goes down to 200 RPM and triggers the BMC panik mode(FANs max.RPM) because the lower threshold is higher.

 

[Hetz Ben Hamo]

You're right, I did change the lower to 0,100,200 and the upper to anything above 3000 (like 4000,5000,6000)
This indeed make the error go away and the FAN5 is now green, but now the fans keeps spinning at 2900 RPM...

 

[RolloZ170]

This indeed make the error go away and the FAN5 is now green

why FAN5 ? no CPU cooling required ?
don't know how the BMC likes that only FAN5 methods.

 

[nexox]

This indeed make the error go away and the FAN5 is now green, but now the fans keeps spinning at 2900 RPM...

You may need to reset the BMC to fully clear the previous error, there's a reboot button on the web console or you can remove power completely for a minute.

 

[Hetz Ben Hamo]

why FAN5 ? no CPU cooling required ?
don't know how the BMC likes that only FAN5 methods.

I've installed the Noctua TR4-SP3 dual fan solution to 2 fan sockets, and the IPMI doesn't show it. I heard that's a known issue since those fan are "low wattage" or something...

 

[Hetz Ben Hamo]

You may need to reset the BMC to fully clear the previous error, there's a reboot button on the web console or you can remove power completely for a minute.

Yeah, I'm using the ipmitool so "ipmitool bmc reset warm" does the job

 

[RolloZ170]

I heard that's a known issue since those fan are "low wattage" or something...

no just tach pulses required to detect.

 

[RolloZ170]

check motherboard manual which FAN is for CPU and which PCIe or for Drives.
FAN5 may run high because a temp sensor reports high temp.

 

[Hetz Ben Hamo]

no just tach pulses required to detect.

Not sure I understand. Something that I should do? Any instructions or link please?

 

[RolloZ170]

Not sure I understand. Something that I should do? Any instructions or link please?

Noctua are just to slow RPM too, adjust thresholds.

 

[RolloZ170]

Any instructions

do ac power cycle to redetect FANs.