Ok so i've got a task. I've got a Hard Disk that has been Degaussed. From what i understand is the hard disk has notches inside the drive that reads and writes the information. When the hard drive is degaussed the notches are completely erased deleting all the data, making it basically useless. My task is to find out how to put the notches back, either by restoration (if possible) or manually doing it my self. So that the hard disk can be used again. I dont have to actually do it i just have to find out how you would do it. Also i was told that NASA and other corporations use degaussing to clear their disk before they get rid of them. So i would assume that it would be impossible to get the data that was originally on the disk back, so at this point i just need to figure out how to get the notches back to where the hard drive can be used.