A few days ago we got two new PowerEdge R220 servers. One is fine but the second one displays bizarre behaviour:
If there's minimal load or network activity the fans spin at full speed. However once it's stressed or receives lots of network traffic the fans slow down considerably.
I updated the BIOS to the newest version but couldn't find anything to change thermal or power management.
The tests were made with random big files to create network traffic and with SuperPI to create at least a little bit of stress on a single core (and that load is sufficient!).
My questions are: what else could I try to solve this? Is this a hardware issue which means I should just call a technician?
Best Answer
I managed to find a solution for this.
Go to system setup (F2), select Profile Settings and set Perfomance to custom, then make sure that: C1E = Enabled C States = Disabled.
All seems to work fine for the last couple of hours and the fans keeps the same RPM.