I continually lowered the lower threshold until it stopped doing that and eventually decided to set the lower threshold to zero.
#Unraid setup ipmi full
Changing it to Standard only lasted a few seconds and then checking it again it was at Full Speed. Checking the Fan Mode it was set to Full Speed. OR using SMCIPMITool in Shell mode: SMCIPMITool.exe shellĪfter setting more appropriate thresholds for the fans I was using, I must have set the lower thresholds too high and noticed all fans quickly spun up to max speed. On initial boot using a Noctua NF-A9 PWM Fan on the CPU cooler directly connected to the board (fan 2) and the built in low RPM case fans connected to the PWM hub connected to the board (fan 1), the fans would surge up and down until after a few minutes they settled in at a lower RPM.įollowing this advice on the lime-tech/unraid forums
I had similar issues with my Supermicro - X9SRL-F unRaid build in a Consumer Phanteks Enthoo Pro case with a built in PWM hub fan controller. Fortunately you don't have to restart the server, power down or unplug from A/C, just reset the BMC. If you make any Fan setting changes that would potentially fix the issue, you must restart the BMC, else the board will continually switch back to Full Speed even if the new settings are correct. You can go back and forth with the board changing the setting every few seconds only to have the board change it back to Full Speed. If you change the Fan Speed via command utility of IPMIView and the board believes something is amiss, it will change the Fan Speed back to Full Speed. If a temp issue or fan issue is detected by the board, it will switch to Full Speed. Check to see that the board isn't changing the Fan Mode to Full Speed. Click to expand.You probably don't need to set the limits back to their old values, as changing them requires some effort (see below).
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