Hi, I got one of these from ebay, they pack them in an external case. So far it's working fine, but it makes a slight sort of pulsating rattling sound when playing blurays. I'm wondering if you who have this drive (most probably if you have a Dell with bluray you do) also experience this. Stupid me, I already pulled the drive out of its external case and into my laptop, voiding the return policy. It still works though, but it's too noisy. Any thoughts?