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Data storage is the recording (storing) of information in a storage medium. Handwriting , phonographic recording, magnetic tape , and optical discs are all examples of storage media. Biological molecules such as RNA and DNA are considered by some as data storage.
Computer data storage or digital data storage is a technology consisting of computer components and recording media that are used to retain digital data. It is a core function and fundamental component of computers. [1]: 15–16 The central processing unit (CPU) of a computer is what manipulates data by performing computations.
A distributed data store is a computer network where information is stored on more than one node, often in a replicated fashion. [1] It is usually specifically used to refer to either a distributed database where users store information on a number of nodes , or a computer network in which users store information on a number of peer network nodes .
Optical storage refers to a class of data storage systems that use light to read or write data to an underlying optical media.Although a number of optical formats have been used over time, the most common examples are optical disks like the compact disc (CD) and DVD.
Blu-ray storage capacity is up to 50 gigabytes (or even 100 GB) of data. [12] The Blu-ray Disc (BD) is a digital optical disc format. It was originally created to take the place of the DVD format due to its expanded storage capacity. The name "Blu-ray" is derived from the use of a blue laser that is used to read the disc.
The following are examples of optical storage media excluded from this article: Holographic data storage - either still in development, or available but generally only encountered in niche usage as of 2007. Laserdisc - not used for recordable data storage in the computing world, although recordable formats did exist briefly.
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