HDD Sleep Mode

HDD Sleep Mode allows you to essentially turn the hard disk off while you're watching a DVD or listening to a CD, to secure a true noise-less environment.

You'll notice that most hard disk drives make a small noise whilst running. If you're a true audiophile and want to focus all your attention on what's playing without interference, this feature will allow you to do 'put the HDD to sleep', so no additional noise is created.