COMPUTER FUNDAMENTALS

Detailed explanation-1: -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.

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: -Optical disks rely on a red or blue laser to record and read data. Most of today’s optical disks are flat, circular and 12 centimeters in diameter. Data is stored on the disk in the form of microscopic data pits and lands. The pits are etched into a reflective layer of recording material.

Detailed explanation-4: -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-5: -How is data stored on a hard disk? Data is stored on a hard drive in binary code, using 1s and 0s. The information is spread out on the magnetic layer of the disk(s) and are read or written by the read heads that ‘float’ above the surface thanks to the layer of air produced by the ultra fast rotation of the disk.