New 5D Storage to Offer 10,000x the Density of Blu-ray
In case anyone is wondering what they mean by &quot;5D&quot;: they mean it&#x27;s a 3D array of marks, each of which has both size and orientation. The 3D array is three 2D layers.<p>According to this definition, a DVD or Blu-Ray disc is &quot;4D&quot; because it can have multiple layers each of which stores 1-dimensional data (pit versus no pit). And a book is at least &quot;7D&quot; because it contains a 3D arrangement of marks, and marks can vary in (at least) what letter they are, how large, how bold, and how slanted. (It would be easy to add to that list.)<p>I would describe this thing as 2.5D storage: it&#x27;s basically 2-dimensional but with multiple layers.<p>If it&#x27;s genuinely 10000x denser than Blu-ray, great! If it&#x27;s likely to last longer, also great! But there&#x27;s no need for this &quot;five-dimensional&quot; bullshit.<p>(It looks to me as if what they have at the moment is not anything like 10000x denser than Blu-ray. I&#x27;m not sure it&#x27;s even 1x denser than Blu-ray at present.)