Hello there, after a hard drive scan with Drive Genius, it found out 29 bad sectors on the hard drive. As DG explained, once they're spotted, they can be permanently disabled in the drive's controller. Therefore, my primary question is, can these failed blocks slow down the whole computer significantly, as an Apple Genius said when I brought it back for a quick reinstall after a one-time RAM failure? Like, if a large file needs to be written, it will necessarily fragment around these blocks¿ Background: I have bought the drive in 2011, had to return it because of heating issues, and just learned that they never received the original one, and that I consequently lost all remaining warranty. Western Digital never made me aware of that fact, and needless to say, I am extremely pissed that a 5-year-waranty drive 1. would require two replacements in 2 years and 2- that I would have to buy a new one with a ridiculously low amount of "loyalty discount".