Wd black idle noise

i have a wd black 3tb (WD3003FZEX)

the drive makes what sounds like a typical very short writting/reading noise every 5 seconds or so.

i even only connected power to it with no data cable. i exchanged the first one thinking something was wrong, but this second one is doing it too.

anyone else having this happening? i hope this isn’t supposed to happen.

Please check the following article:

How to tell if the noise or sound the drive is making is normal

http://wdc.custhelp.com/app/answers/detail/a_id/568