can we have option for rewritable optical discs? if we have so how could this possible to rewrite disc. what technology is used? Is this beneficial for users or not?
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This article is about digital storage media such as CDs and DVDs. For a similarly-named anatomic feature of the eye, see optic disc.
"Optical media" redirects here. For transmission media for light, see Optical medium.
In computing and optical disc recording technologies, an optical disc (OD) is a flat, usually circular disc that encodes binary data (bits) in the form of pits and lands (where change from pit to land or from land to pit corresponds to binary value of 1, no change, regardless whether in land or pit area, corresponds to binary value of 0) on a special material (often aluminum[1] ) on one of its flat surfaces.
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