I have a Dell R710 rev. II that I use in my home office lab (homelab) running ESXi 6.5. The R710 sits in my office where my girl and I spend some days when we work from home. Normally the hum of the R710 fans isn’t terribly bothersome - the 5 fans it houses run at around 3,800 RPM each. The noise is definitely noticeable so I did a little bit of digging into ways I could quiet it down. After looking into replacing the fans with quieter ones I found that I could override the system control of the fans and silence them that way. While I have to monitor the onboard temperatures more closely when disabled, I’ve found little downside to doing so when I’m in there. Here’s how to do it:
The commands used below assume default username / password of root / calvin. Hopefully you’ve changed the default password so substitute yours where applicable.