i just bought a 100gb hitachi hdd for my 1.83 macbook. i noticed something, when i removed the stock hdd it was different form the new one in that it contains these 4 extra pins next to the power connector and the new one did not. now i went and installed the new drive but my computer wont recognize it. im wondering will these extra 4 pins have anything to do with that. can anyone please give me some advice cause i really dont wanna deal with returning this new drive cause i bought it on ebay and dont wanna go through the hassle of shipping it back out. thanks.btw the new drive is 7200rpm.