Monday, 15 March 2021

Optical Disk Drives

What is Optical Drives?

Optical Drives is a hardware device which used for reading and writing  a data in CD and DVD Disc. It uses electromagnetic waves to produce visible light spectrum which provide a read/write data process in optical disc. The CD was develop by Sony and Denon which is introduce in 1984 and the storage capacity is 650 MB. The DVD is develop by Panasonic, Sony, and Toshiba which is introduce in 1995 and the storage capacity is 4.7 GB.

Types of Optical Disk Drives

Some of the commonly used optical storage devices compact disks are
  • Compact Disk Read Only Memory (CD-ROM)
  • Compact Disk Recordable (CD-R)
  • Compact Disk Rewritable (CD-RW)
  • Compact Disk Digital Video Disc (DVD)
Types of Optical Disk Drives

Compact Disk Read Only Memory (CD-ROM)

The Compact Disk Read Only Memory it contains data were computers can read but not write or erase in CD-ROM it is a type of read-only memory. In the 1990s CD-ROM was use for software and data distribution for the computer. Some CDs are use to play audio on the CD players. Therefore a disk is made up of 1.2 mm thick polycarbonate plastic with a thin layer of aluminum to make a reflective surface. The common size of CD-ROM is 120 mm in diameter and the smaller Mini CD standard size is 80 mm in diameter.

Compact Disk Recordable (CD-R)

CD-R is a digital optical disc storage format. A CD-R disc is a compact disc that can be write once and read arbitrarily many times. CD-R discs (CD-Rs) are readable by most plain CD readers that are CD readers manufacture prior to the introduction of CD-R. This is an advantage over CD-RW, which can be re-written but cannot be played on many plain CD readers.

Compact Disk Rewritable (CD-RW)

CD-RWs, as opposed to CDs, require specialized readers that have sensitive laser optics. Therefore CD-RW is a digital optical disc storage format introduce in 1997. A CD-RW compact disc can be written, read, erased, and re-written. Consequently, CD-RWs cannot be read in many CD readers built prior to the introduction of CD-RW.

Digital Video Disc (DVD)

Digital Video Disc is a digital optical disc storage format invent and develop in 1995 and released in late 1996. The medium can store any kind of digital data and is widely use for software and other computer files as well as video programs watched using DVD players. DVDs offer higher storage capacity than compact discs while having the same dimensions.

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