DD860 fan speed control

Hi to all,

I'm new to the forum, so thank you for helping me.

I acquired an old DD860 server and plan to use it as a basic file server.

I managed to install Windows Server and everything looks OK except for the fans.

The fans operate at 6000 rpm constantly.

Is there a way to modify the fan speed thresholds?

I looked into the Bios, and there is no option for it.

I managed to connect to the BMC via IPMItool.

I tried the commands suggested on this forum (and a few others) to control the fans of a Power Edge server, but they are invalid.

Is there an IPMI raw command that can control the fans on a old Data Domain server?

Thanks again for your help.