In all my years having dozens of computers over that time I have had only 1 hard drive ever go bad on me. It was a WD Black 600 GB that came with my current PC I bought 3 years ago. It was in raid configuration and I had just finished installing Windows 7 when it went down. It was just bad luck that it failed right away and the company I bought the PC from quickly sent a replacement. So that hard drive had worked for maybe 30 min. and died. Then again it was probably good luck to have it fail before I had everything installed along with all my files.