The most common types are CD, DVD and Blu-ray. As removable media, optical discs superseded the earlier magnetic disk cartridges because they weigh less, have higher capacities and are not subject ...

Using 3D storage techniques, scientists at the University of Shanghai for Science and Technology developed an optical disk capable of accommodating 1.6 petabits of data (that's 1.6 million gigabits).

The data-transfer-rate of an optical disk is determined by the disk's rotational speed. Conventional CDs and DVDs, which use a 1.2-mm-thick polycarbonate substrate, could break from centrifugal ...

A storage system that contains multiple optical drives that read and write the media simultaneously. Libraries may hold one disc per drive or have storage for any number of discs or cartridges ...