An hour ago, I tried to access the files inside the hard drive of my another laptop. I need to wait for authorization to gain access of the files under my username of that hard drive. I suspected there are some problems as I hear some unusual sound from the hard drive and I unplugged the drive from my current laptop. Now that drive seems no longer be detected in Ubuntu live CD. When I tried to connect it to the laptop again, I can hear "deh-deh" but in Computer Management it seems nothing is detected. Please help. Any suggestions are much appreciated. Thanks