Well, do not forget the 'chisel and flat rock'
technology. That is
pretty durable!
Although far from a linear relationship, it is beginning to sound as though
data density is directly related to technology advancement, and data
longevity is inversely related.
So, how'zbout build a stonehenge like creation, and chisel the bits into
the hard sectors? Has anyone taken a close enough look at Stonehenge to
confirm that the media is unformatted? At least designing the drive
would be easier than one for reading sheep. (hint: move the head, not the
platter)