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ReadyNAS 4200V2 OS6.6.1 fan control
OK, I couldn't resist picking up an inexpensive ReadyNAS 4200V2. I ran it a short while on OS 4.2.30, then upgraded to 6.6.1. While the fans ran a bit higher than I thought they needed to on 4.2.x ...
There is no RN4200v2 sensors config that ships with OS6. There aren't any RN4200v2 systems around here so I can't verify this, but you may be able to just copy the RN4200v1 config and start from there. It might "just work". Just do this:
# cp /etc/frontview/sensors/RN4200.conf /etc/sensors.d/ # systemctl restart readynasd
OK, I did some experiments unplugging fans:
Based on the OS6.1.6 labeling, the physical location of the fans is as follows:
Fan 1 = Fan_Sys2 = Fan 3 MB header
Fan 2 = CPU fan = Fan1 MB header
Fan 3 = Rear, uninstalled fan = Fan5 MB header
Fan 4 = Fan_Sys1 = Fan4 MB header
Fan 5 = Fan_Sys3 = Fan 2 MB header
Temp2 appears to be CPU case temp, as it rose the most when I unplugged the CPU fan..
I plugged a fan into the rear motherboard fan header and the fan control point dropped to 5200 on the case fans, 2220 on the CPU fan, and 3300 (which I believe is somewhere near its max) on the extra fan. So the fan "failure" was a factor. This was further confirmed when all the fans bumped up whenever I disconnected one of them.
The case fan speeds are still higher than expected. My curent guess is that the system wants to get the CPU and extra fan RPM higher, but they aren't the same kind of fan and won't go that high. A next possible step is to jumper the tach output of one of the case fans to the rear header and see if it slows things down any. But what to do about the CPU fan not achieving desired speed? If I fool the system on that one, I won't know if the fan really fails. But it's worth a try.
Is there any way to tweek the fan control to know what to expect from the fans rather than using a hardware hack?
I could, of course, go back to 4.2.x; but I was really hoping for 6.x.
There is no RN4200v2 sensors config that ships with OS6. There aren't any RN4200v2 systems around here so I can't verify this, but you may be able to just copy the RN4200v1 config and start from there. It might "just work". Just do this:
# cp /etc/frontview/sensors/RN4200.conf /etc/sensors.d/ # systemctl restart readynasd
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