Western Digital RE4 WD5003ABYX clicking/tapping noise

I just purchased a new Western Digital RE4 WD5003ABYX 500 GB drive.  After getting it installed and running, I noticed it makes an unusual sound for a hard drive.  It’s almost like a tapping sound.  It still makes the usual hard disk noises, and they are significantly quieter than the tapping noise and my previous hard drive.  Just wondering if I should rma this or if it is characteristic of this model of hdd.  I provide a link with a recording of the sound.  Skip to the 30 sec mark to hear it.

http://soundcloud.com/user919583005/click-of-death

Any insight would be greatly appreciated.  Thanks.

Hi I would run WD diagnostic program and see what it has to say. But it should not make a noise like that I wouild try and return the drive where you got it and get a replacement since you just bought the drive. Or contact WD and speak to them about the noise and get a rma.