Today, I received an order which included a Western Digital Caviar Black 750GB. Upon booting the PC, it produced the same noise that can be heard in this video. Once Windows setup finished, it became much quieter but even when the computer is idle, it continues to produce a similar small 'jolt' every 3 seconds or so.
Is this normal for the Black series? I've read enough to know it can sometimes be a bit loud yet it seems strange that it would create sound when the drive isn't actually being asked to do anything. If there's a problem, will I be able to return the hard drive on its own?