Hi. I've got a macbook pro 13 2010 model with a 250gb stock hard drive. i've recently noticed that when i carry my laptop around the house (whilst on) and casually put it down on the sofa or other cushioned surface i hear a little chirp which i believe is coming form the HD. has anyone noticed this on their computers? I'm not exactly easing it down gently but not throwing it down from a great height either. I'm "dropping" it from about 5-10cm(2-4inches) or so. One edge of the notebook contacts the surface first and then the rest touches down on the sofa. I think i'm being gentle with it but the chirp is concerning. Do you think it's the drive heads scratching the drive platter? It's happened a few times now. does anyone else have this happen to them, can it be something else? more importantly: is there a hard drive utility out there that can scan the hard drive and determine if i've damaged/scratched it? it can be on osx or windows as i have both on my mac. I've already "verified" my drive with osx's disk utility without problem but i want a better scan.