Not detecting HD

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http://forums.fedoraforum.org – Ok so i have an Acer Aspire 3680 laptop that had windows vista on it and one day i turned it on and it said no operating system found, i though maybe its windows being.....windows lol, anyway i used Gentoo linux before but my friend helped me install it and i loved using it so i figured i would install a Distro on my laptop and use it again, i downloaded the live cd of fedora and ran it I'm using it right now. when i go to install it on the HD it says there is no valid device and i should check my hardware. is there a command i can use to check and see if maybe my HD is corrupt or something like that (HowTos)