[ubuntu] Weird noises coming from Hard-drive, and a problem.

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http://ubuntuforums.org – First off, I only encounter this problem in Ubuntu. I had installed Arch, and everything worked like a miracle. (Not going to explain why I switched back to Ubuntu) After logging in, and the desktop loads, I start hearing weird noises from my hard-drive every few minutes. When the noise is constant, that's when my second problem appears. The second problem is, /home switches from rw (read-write) to ro (read-only), and I can't save any of my files on it. Needless to mention, this only happens to my on Ubuntu. Few specifications of my laptop: - HP Pavilion Entertai (Hardware)