Periodic Noise from Head Movement WD Black 4TB

I can’t hear any out of the ordinary noises with this drive, and haven’t noticed any unusual chunk or clunk noises. I do have it sitting in a Define R4 case, though, so I can’t hear the drives at all unless they do some serious rapid head movement.

To me it sounds like a perfectly normal, and healthy, hard drive. (Esp compared to my 2 year old Seagate drives that sound like they’re scraping the heads across the platters every 30 seconds).