Check to see if Gnome Disk Utility is installed. If not, then open a terminal and run the command, "sudo equo install gnome-disk-utility". Alternatively, you can search for the package in the Rigo application browser and install it from there.
Once Gnome Disk Utility is installed, run the program and check the status of your disk. If it says that your disk has a few bad sectors, then you should be alright for the time being, but eventually you'd need to replace your hard drive. If it says you have Many bad sectors, then you should backup your data and replace the disk as soon as possible, otherwise the drive could crash and you may lose your data.
Every time I compile Gentoo I feel like I should sacrifice a goat.
<3 Gentoo, Sabayon, & Arch Linux