Hard disk problems

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http://ubuntuforums.org – My windows vista crashed and wouldn't accept a retrieval so I installed ubuntu 12.04 that I had on disk. I keep getting a message 'Disk Utility' A hard disk is failing. :mad: (Running Ubuntu off a 'CD') I have two drives in my system drive 'C' the main drive and drive 'D' how do I format them so as I can install Ubuntu permanently? :D Regards Evertonmint (Hardware)