I've got a Western Digital 100GB 7200RPM drive. Recently, the drive has slowed down considerably. For example: when unraring a 700mb game, it'll now take about 7 or 8 minutes to unrar. Normally it would take about a minute. Copying from that drive to my main 20 gig drive is also painfully slow. I've defragged multiple times with no improvement. What could be causing this slowdown? Is it dying?