Is it possible to add fan control function？

[docker2017713]

A problem that most users of old Dell servers will encounter is that adding third-party hardware will cause the fans to go crazy. They are usually controlled through the ipmi command, but this is very inconvenient.

[Breina]

Maybe that's possible.

Can you find an API resource that controls the fans?

https://www.dell.com/support/manuals/en-us/idrac8-lifecycle-controller-v2.70.70.70/idrac8_redfishapiguide_2.70.70.70/redfish-resources?guid=guid-d3e85da8-5d22-4eb1-82ff-d2fdd4cd7730&lang=en-us

[phb911]

While this would be a good thing, it does not make sense to invest efforts. Dell disabled the option to control the fans since firmware 4.40.40.00 (see here: https://www.dell.com/community/en/conversations/systems-management-general/idrac-9-enterprise-will-not-downgrade-from-4404000-to-4401000/66b27a7740d71075c417d665)
Well, you still are able to speedup the fans by adding a base value, but lowering the fan speed below the dell default values is now impossible without a hardware solution.