I would try booting to a Ubuntu linux LiveCD disk and see if this is not a harddrive failure.
If you are interested in trying this troubleshooting proceedure I will provide a link to download the ISO image here.https://help.ubuntu.com/community/LiveCD
This ISO image creates a bootable disk like operating system, which can be used for trouble shooting and does not have to be installed to run. It will run right off the cdrom disk.
This web page includes all information you'll need and because it is linux related you can pop over to the linux\unix forums section of BC.com at this link if you need more assistance:http://www.bleepingcomputer.com/forums/f/11/linux-unix/
Edited by MrBruce1959, 26 March 2010 - 07:36 PM.