Mempile announce one terabyte optical disc
In a DVD or HD optical media, there are either one or two layers of data. Adding more layers using existing technology would be expensive ? but more importantly, it would have to get around a very basic problem: it?s difficult to read information embedded deep inside this kind of media. The current semireflective layers used to store data on CD/DVD/HD-DVD/BD reduce the amount of light that reaches the deep layers, making the amount of signal reflected from each layer smaller, after a few layers the amount of light reflected becomes so small and so noisy that reading the data becomes nearly impossible.
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