Basically ive got 2 hard drives in my comp my raptor has got xp on, and most games and a few applications etc, whilst everything else is stored on my other hard drive, recently in the last few days, when I first boot up my pc the second hard drive doesnt even show up, so I reboot, and its there again, although not always for very long, is this by any chance major warning signs of an inpending hard drive failure?