WD40EZRZ weird sound, is this normal?

Hello, bought 3 disks for the NAS and they sound like this from the start, its loud enough to be heard in a living room and drive a person crazy. And it repeats pretty often, 3-7 times in a minute or so. Can anyone say, is this normal for this drives? What should I do?

Sound sample - https://yadi.sk/d/cNgjG6xDqQgDLg .

Hi Kpu4,

Current drive technology dictates that some noise will occur during normal drive operation. But as its loud enough, you can test your drives with Data Lifeguard Diagnostics to check whether the drives are working fine or not. You may refer below article for more details about this: