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Optical Storage Devices - Overview

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Optical Storage Devices - Overview

Optical storage is also known as “Optical Media” or “Optical Memory” or “Optical Medium“, and it allows all read and write activities which are performed by laser beam.

In optical storage devices, all recording information is stored at an optical disk. As per the opinions of data scientist that compact space is most useful for huge data storage. Their big advantages are not more costly, light weight, and easy to transport because it is removable device unlike hard drive.

Why to Use Optical Storage

In the optical storage devices, all data is saved like as patterns of dots which can be easily read with using of LIGHT. Laser Beam is used like as “Light Source”.

The data is read while bouncing laser beam on the surface of storage medium. Laser beam creates the all Dots while reading process, but it is used with high power mode to mark the surface of storage device, and make a dot. This entire process is also called the “Burning” data onto Disc.

Examples of Optical Storage Devices:

CD-ROM

It stands for Compact Disc Read-Only Memory. As the latter part of its name suggests, the data present on a CD-ROM is in “read-only” format. It cannot be modified or erased. This feature of CD-ROM and its large storage capacity enables us to store a large amount of data. The first CD-ROMs could store up to 600 MB of data, but now with advancements, we can store up to 800 MB of data.

DVD-ROM

It stands for Digital Video Disc Read-Only Memory. Just like CD-ROM, the information stored on a DVD-ROM cannot be erased. A single DVD-ROM can store up to 7 times more information than a CD-ROM.

Blue-Ray

With advancements in technologies, a new optical storage device – Blue Ray Disc emerged which replaced DVD-ROM and CD-ROM as it can store even more data onto them. A single Blue Ray disc can store up to 25-30 GB of data and a double-layered disc can store twice that of a single-layered disc. These discs are mainly used to store High Definition(HD) videos.

It stands for High Definition Digital Video Disc. These storage devices are a replacement for Blue Ray discs and are used to store high-definition videos onto them. A single-layered HD-DVD can store up to 15GB of data while a double-layered can store data twice that of a single-layered disc.

 

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