Admittedly, this is my first time using IPMI so I'm am stilling getting used to all the features. Regardless, I must say that it is pretty amazing. The only nitpick I'm having is that web interface keeps giving me a critical reading. I'm lead to believe that this is because of the FAN2 reading on my server. I'm pretty sure this is the 4-pin stock CPU fan using PWM. Not sure what exactly the issue is, but I've attached a screenshot of my sensor readings. Any clue as to what's going on?

Based on the 2 posts at the bottom of this page: http://forums.nas4free.org/viewtopic.php?t=5739  it looks like the error is due to the RPM "low" threshold for the fan.  If you aren't noticing any issues, it's probably nothing to worry about it.  However, there is a reference to a tool that can be used to lower the threshold to prevent the error.  Again, assuming you aren't noticing any other issues, it shouldn't be an issue to lower the threshold.

Interesting, I'll look into changing the thresholds. Just for reference, should a CPU fan be running around 300RPM? That seems a little too low for me. Is it because unRAID doesn't stress the CPU too much or something? By the way, I'm using the stock Intel cooler.

I am using the X9SCM-iiF mobo.  I have the cpu fan connected as FAN A and FAN 1 through FAN 4 connected as chassis fans (although only two in use).

 

I don't remember where I found the information which led me to connect like this, but it's been working like this for a couple of years in ambient temperatures up to around 35C.

 

I leave the cpu fan under BIOS control and use the fan_speed plugin to regulate the chassis fans.  Fans 1 to 4 only have a single control input and, therefore should all run at the same, or similar, speeds.

 

I'm guessing that you have nothing connected to FAN A (and, perhaps, FAN 2?).  Fans 1, 3 & 4 are all running at near-identical speeds.

I was switching out the stock 120mm fans for some Be Quiet Pure Wings 2 and noted where the fans were actually plugged in. Turns out that FAN1 and FAN4 are the rear fans while FAN3 is the CPU fan. FAN2 is actually the 200mm fan on top. Basically, the critical reading was present because I was using the fan controller to set it to low. Medium sets the reading to Warning while High sets it to Normal. Seems like changing the threshold is the solution in this case. Although, is there is simple way to do this in Windows? The only device I have running Linux is an old beat up Compaq laptop.