Whirring noise on new drives ONLY at shutdown?!?

[jant]

Hi, I have a similar “problem”, that seems not to be according this thread.

Strange hard disk noise when turn off - with audio

Hi, I recently purchased a new hard disk for my Ex2 Ultra Nas: WD Red Plus - WD40EFZX, 4TB When I turn off the NAS there is an strange noise…too much noticeable, I suppose is the headers… The rest of time, all perfect. All test passed. Kind regards

What do you think?