what do you mean it didn't work?
you mean that you did as what they said and still the same results?
I mean that I wasn't able to do what they said. I backed up with Acronis, made the GParted boot disk, booted into GParted, deleted the old partitions, and then tried to wipe the drive in the terminal.
The "hdparm --security-erase NULL /dev/hda" command (I also tried several variations) did not work. Despite the --security-erase flag it was still asking for a password which is strange because there is no password. I also tried to get root access but the "su -" command was also asking me for a command. (And yes, I tried "sudo hdparm --security-erase NULL /dev/hda" but that also asked for a password.)