I installed a Scorpio Blue 750GB 5400rpm drive in my MBP when I bought it, and it was running fine for about 18 months. Then it started hanging left and right, and using SMART Utility, I found there were bad sectors. So since it was still under warranty, I sent it back to Western Digital, and got my replacement last weekend. This week, I'm still getting hanging, and so I ran SMART Utility again, and now there are 63 bad sectors, and it still says my hard drive is failing (with the NEW drive). I installed "Smart Reporter" and it keeps popping up with I/O errors. So, is it possible I'm doing something wrong with installing my hard drives, or has Western Digital been known to send bad drives? I came across the hdapm tool and installed it last weekend, as I think that was the reason for early burnout with the first drive. Just bad luck?