DVD’s New Cousin Can Store More Than a Petabit
"A novel disc the size of a DVD can hold more than 1 million gigabits—roughly
as much as is transmitted per second over the entire world’s Internet—by
storing data in three dimensions as opposed to two, a new study finds."
"Now scientists in China have developed a way to encode data on 100 layers in
optical discs. In addition, the data is recorded using spots as small as 54
nanometers wide, roughly a tenth of the size of the wavelengths of visible light
used to read and write the data.
All in all, a DVD-size version of the new disc has a capacity of up to 1.6
petabits—that is, 1.6 million gigabits. This is some 4,000 times as much data
density as a Blu-ray disc and 24 times as much as the currently most advanced
hard disks. The researchers suggest their new optical disc can enable a data
center capable of exabit storage—a billion gigabits—to fit inside a room instead
of a stadium-size space."
See:
https://spectrum.ieee.org/data-stora...t-optical-disc