What is Optical Memory And Its Types Optical Storage

What is Optical Memory And Its Types Optical Storage Types of Optical Memory CD ROM Disks: WORM Disks: What is Optical Memory?



What is Optical Memory?


What is Optical Memory And Its Types

Optical storage is the storage of data on an optically readable medium. Data is recorded by making marks in a pattern that can be read back with the aid of light, usually, a beam of laser light precisely focused on a spinning optical disc.

Types of Optical Memory


  1. These are the memories which use high-intensity light signals to store and read data from the memory device.
  2. These memories are highly reliable, compact in size and inexpensive compared to their capacity.
  3. These memories are circulars in shape and divided into tracks, normally contain a large number of tracks.
  4. These disks are normally sequential storage direct access medium that is one can access any of the track on this disk directly.
  5. These are mainly three optical types of memory in the market.

CD ROM Disks:

What is Optical Memory And Its Types

  • This is the most popular types of optical disk in the market.
  • This was invented by Phillips Company; initially, this memory was used for audio data storage, for recording and distributing music.
  • But later on, the CD becomes a very popular medium to store and retrieve computer data because of its high capacity, high reliability, and low cost.
  • Most of the Compact Disks in the market are read-only type memories.
  • That is once the data is written on these disks then that cannot be altered.
  • CDs are inexpensive medium to store a large amount of data, in fact, one blank CD of approximately Rs/- 20 can store around 650 MB data, which is equivalent to storage of around 500 floppies.
  • CDs are used for storing all types of data like audio, video, text or any other type of business data.
  • Because of its low cost and high reliability, it is used as a universal portable type of memory for distributing software and data from one place to another place.
  • Presently, CD's manufacturer has also introduced the CD - R/W that is Compact Disk Rewriteable, which allows a CD to be written again and again like a floppy.
  • CD- R/W is used just like the floppy but has the advantages of high capacity and more reliability than floppy.
  • With the popularity of internet and multimedia, the higher capacity storage mediums are required to share a large volume of information in the form of images and documents.
  • And CD and DVD storage mediums are playing very important roles to share and exchange this information from one system to another.
  • In CD, a synthetic reflecting surface is used for data storage.
  • The data on CD is stored on multiple tracks with the help of laser light signals.
  • Over the years, The CD has gone through many technological changes; such as:
    • CD- ROM
    • CDR/W
    • CD -RW
  • The popular companies that manufacture CD-ROM drive, CD- writer are Samsung, Creative, HP, and LG.


WORM Disks:

What is Optical Memory And Its Types

  1. These are optical memories known as Write Once Read Many time’s disks.
  2. These memories are like CD-R and used for storage of historical data, permanently.
  3. These disks can store approximately 200 MB data in the text and image data form.
  4. The WORM disk is no more a popular disk; it has been replaced by more popular optical laser disks known as CDR and DVD - R.

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NEtechy: What is Optical Memory And Its Types Optical Storage
What is Optical Memory And Its Types Optical Storage
What is Optical Memory And Its Types Optical Storage Types of Optical Memory CD ROM Disks: WORM Disks: What is Optical Memory?
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