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Magnet optical disc

Magnet optical disc is one of optical discs. The size of discs is 3.5inch and there are a disk capacity of 128MB/230MB/540MB/640MB/1.3GB/2.6GB.

Originally, the disc need in writing time to be formated[?], written and verified[?], which is time-consuming and causes sever loss in performance. These years, a technology called overwrite improved the perfomance by enabling format unnecessary.

It has been quite popular in Japan.

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