Dell R730/R7910 Fan Control

[scline]

Hello!

I am wondering if it's normal for the Dell R730/R7910 to not auto-ramp up fans when the CPU is hot?

I am using ESXi on a Dell R7910 (it looks exactly the same as an R730, inside and out) and have noticed the fans are not ramping up during a CPU stress test. I can see the CPU temperature hit 75C in the iDRAC but fans will simply stay ~20% and not change at higher loads. iDRAC firmware is updated to latest versions and verified fans are not set by IPMI commands.

 

[nle]

Did you figure out this? I'm experiencing the same issue on a Dell PE T420 server.

I can hear the ESXi take control over the fans when it get far enough in the boot process, and spins them down from ~1500 to ~950 RPM

EDIT:
When the temperatures went up to close to 80 C, it increased the fan speed to 1080 RPM

I have the "Minimum Power" thermal profile, so maybe that is more aggressive than i thought.

 

[scline]

Unfortunately not I have it statistically set at ~30% and don’t really push the server to hard. It works but not ideal.

 

[brinox]

In the iDRAC > Hardware > Fan section, there should be a Setup page, and there you should be able to specify an exhaust temperature target and/or a fan speed offset. Setting either of these different from default/off should increase the fan RPM.