Data storage


Definition:

Any type of information - words, figures, still or moving images, sound or music - can be coded into a single electronic form: digital. Once in digital format, all these types of material can be shared, copied, processed, indexed and transmitted from computer to computer, quickly and flexibly.

Types Of Data Storage:

Ipods (mp3)
USB's
Phones
Hard Drives
Floppy discs
Cameras
Video Recorders
CD ROM
DVD


Computer Storage, computer memory, and often casually memory refer to computer components, devices and recording media that retain digital data. Computer storage provides one of the core functions of the modern computer, that of information retention. It is one of the fundamental components of all modern computers, and coupled with a central processing unit (CPU).
A computer system usually contains several kinds of storage, each with an individual purpose, as shown in the diagram.

Primary storage is directly connected to the CPU of the computer. It must be present for the CPU to function correctly. As shown in the diagram, primary storage typically consists of three kinds of storage:

1.Processor Registers
2.Cache Memory
3.Main Memory

Secondary storage requires the computer to use its input/output channels to access the information, and is used for long-term storage of persistent information. However most computer operating systems also use secondary storage devices as virtual memory.

Tertiary storage is a system where a robotic arm will "mount" (connect) or "dismount" off-line mass storage media (see the previous item) according to the computer operating system's demands.

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