COMPUTER HARDWARE
STORAGE DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Red laser lights is used to read and write data
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stores data in parallel tracks
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Uses blue laser to read and write data
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Data is stored in ‘pits’ and ‘bumps’ on the spiral track
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Detailed explanation-1: -Optical data storage is a method of storing digital information (1’s and 0’s) by using light to read the information. Analog information is converted into digital information, which is then encoded onto the disc from the inside edge out. Digital data are encoded by means of pits on the recording layer of the disc.
Detailed explanation-2: -Data is stored on the disc as a series of microscopic indentations called “pits", with the non-indented spaces between them called “lands". A laser is shone onto the reflective surface of the disc to read the pattern of pits and lands.
Detailed explanation-3: -The first thing one would notice is the bumps on the aluminum surface. These bumps are where the digital data is stored in binary form. The areas where the Aluminum is closer to the bottom (plastic), are called Lands, and the opposite bumps are called Pits.