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A magneto-optical drive is a kind of optical disc drive capable of writing and rewriting data upon a magneto-optical disc. 130 mm (5.25 in) and 90 mm (3.5 in) discs are the most common sizes. In 1983, just a year after the introduction of the compact disc , Kees Schouhamer Immink and Joseph Braat presented the first experiments with erasable ...
Magneto-optical recording writes/reads optically. When writing, the magnetic medium is heated locally by a laser, which induces a rapid decrease of coercive field. Then, a small magnetic field can be used to switch the magnetisation. The reading process is based on magneto-optical Kerr effect. The magnetic medium are typically amorphous R-Fe-Co ...
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]
A buffer underrun occurs during recording if the supply of data to the recorder is interrupted before the write is complete. Software typically moves the data to be recorded into a buffer; underrun occurs if the recorder processes data in the buffer faster than the software reloads it. Historically, buffer underrun was often caused by writing ...
MiniDisc (MD) is an erasable magneto-optical disc-based data storage format offering a capacity of 60, 74, and later, 80 minutes of digitized audio. Sony announced the MiniDisc in September 1992 and released it in November [ 2 ] of that year for sale in Japan and in December in Europe, North America, and other countries. [ 3 ]
This was followed in August 1982 by the introduction of the digital audio audio/music CD, [8] which soon led to an effort to standardize data recording on this media. This was introduced in 1985 as the "Yellow Book", which became known as CD-ROM. [9] In 1983, Philips introduced their early work on magneto-optical drive technology at an industry ...
Data recording (and erasing) was achieved by heating the magneto-optical layer's material (e.g. Dy Fe Co or less often Tb Fe Co or Gd Fe Co) to its Curie point and then using a magnetic field to write the new data, in a manner essentially identical to Sony's MiniDisc and other magneto-optical formats.
Optical - Optical recording heads use the principles of optics and light to impart energy on a recording medium, which accepts the energy in a readable manner, e.g. by melting or photography. Note that Magneto-optical recording, though using optics and heat , should properly be considered a magnetic process, since the data stored on magneto ...