Vassilis: the 83% happened to me when I had not enough memory and linux was using a swap partition it found on that hard drive. As it could not wipe the disk entirely (because swapoff -a failed), this error used to happen.
As the OP didn't answer, let's wait for a while. -- Ubuntu RC Dapper CD Install https://launchpad.net/bugs/47116 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs