I recently installed Windows in dual boot with Linux (on two different SSDs) and I noticed that Windows automatically “shuts down” or stops the HDD if it is not being used.
I have a HDD (WD) connected by SATA cable where I usually keep my games. The HDD is not always in use but it is always constantly running and honestly the noise it makes is quite noticeable. I’m sure I don’t have any program in the background using it constantly.
I have already tried to solve this problem using hdparm and hd-idle and although in theory they work I still hear the noise from the HDD.
If your only concern is noise (and not saving power), then the easiest solution is to just sound-proof your case - install some foam pads or something to dampen the noise. Check out https://www.quietpc.com/acousticmaterials to get an idea of what’s out there and what you can use, but even simple random foam that you’d get in parcels would work to start off with.