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Can I always retrieve back the folders and files on a hard disk that contains bad sectors? As far as I know bad sectors do spread, and it can cost your OS unable to bootup if the bad sectors are in the OS drive. But whether it will spread to a situation whereby it's totally unable to retrieve any files and folders or not is something I don't know...
+1 for "if it's critical data, don't try this at home" – Piskvor left the building – 2009-07-29T21:19:28.977