In what way are magnetic patterns unsubstantial? You can read information from them, which is really what we’re trying to do here, isn’t it? Is the goal to hav

In what way are magnetic patterns unsubstantial? You can read information from them, which is really what we’re trying to do here, isn’t it? Is the goal to have it be readable to the naked, nominally working human eye? If so then I’d wager you could use magnetic paper as storage if you were a particularly persistent driver developer.