“Western Digital has updated its eco-friendly Caviar Green with new 333GB platters and 32MB of cache. Keep reading to see whether these upgrades make the GreenPower terabyte faster and more power-efficient than its forebear.”Here are some more Storage reviews from around the web:
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How to go green, successfully

Western Digital has changed their GreenPower terabyte HDD from using four 250GB platters to three 333GB platters and doubled the cache size. The Tech Report loved the first version, which not only delivered on the energy savings promised, but also performed as well or better than some 7200rpm HDDs. Check out what the modifications have done to this drive.