WD Caviar GP: The "Green" 1 TB Drive | Tom's Hardware
Another instance of tech company branding themselves as green. In this case it's not greenwashing, they have added technology to spin the hard drive more slowly when it's not in heavy use. Granted most energy efficient desktops spin down the drive to 0rpm when not in use, but this doesn't always work because windows or some other piece of software might access the drive once a minute. This will also be especially useful for servers that over night still get requests but aren't heavily hit. It won't be huge savings but a little bit on every one of google's rumored 450,000 servers would add up to a lot!