Like the similar WD Greens and Reds, the 2TB Barracuda ST2000DM001 (*006 от 001 вроде не отличается конструктивно) can be found at random in a range of platter configurations - the 'perfect' two-platter version or two different three-platter models, which are slower and might also be less reliable. If you have an ST2000DM001 that weighs more than 600 grams, has a shallow (as opposed to deep and wide) depression on the cover (like this), and HD Tune reports a maximum read transfer rate of less than 190MB/s, you have a three-platter unit, and you may want to consider getting a refund.