Hard disk clicks

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http://askubuntu.com – I have Ubuntu 12.04 LTS installed on Dell Vostro laptop. The device has also Windows 7 and I set it as dual boot. Recently, I found that when I put the laptop to sleep, the hard disk refused to resume and there are serious clicks. Now, I hear these clicks when the laptop is booting and it refused to boot. I shut it down and try many times until it boots. Once the device is working, I don't hear any clicks. Please help Dina (HowTos)