I have just installed my new Hard Drive, Western Digital Black 2TB. I can hear the odd thumping every couple of seconds. I'm sure it is the HDD as I have never heard this sound before. Even when I installed it, it did not make this noise only until I created a new value for the drive for it to be recognised by my system.
Is this a normal things for installing new HDDs. I really does sound like a light tab on your window but on repeat every 5 seconds or so.