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![]() MD Data Sony MMD-140A | |
Media type | Magneto-optical disc |
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Capacity | 140 MB |
Read mechanism | 780 nm semiconductor laser diode |
Write mechanism | Magnetic field modulation |
Developed by | Sony |
Usage | Data storage |
Extended from | Floppy disk MiniDisc |
Extended to | Hi-MD |
Released | July 1993 |
Optical discs |
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MD Data is a type of magneto-optical medium derived from MiniDisc.[1]
In developing and marketing it, Sony was trying to set the new standard for removable media to replace the 3½-inch diskette it had also helped create. MD Data competed in a format war with other disks such as SyQuest's EZ 135, Imation's SuperDisk, and the Iomega Zip.[2] Ultimately neither MD Data nor any of its competitors succeeded in becoming the de facto new universal standard fully replacing the 3.5 inch diskette; with recordable CDs coming closest to filling the role, followed by USB flash drives.
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