hello, about a week or 2 ago i bought a hard drive from newegg, it's the WD5000AAKS. ever since i first bought it, when i boot up my computer, i hear a low grinding noise that lasts for about 1 second, it also makes a small scratching noise that lasts for less than a second when i shut down the computer, right now im running a diagnostic test, but im just wondering if noises like this are normal for a hard drive? i didn't think much of it until now, i just want to know if i should rma it or keep it if nothing is wrong?