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- Snippet from Wikipedia: Computer 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.: 15–16
The central processing unit (CPU) of a computer is what manipulates data by performing computations. In practice, almost all computers use a storage hierarchy,: 468–473 which puts fast but expensive and small storage options close to the CPU and slower but less expensive and larger options further away. Generally, the fast technologies are referred to as "memory", while slower persistent technologies are referred to as "storage".
Even the first computer designs, Charles Babbage's Analytical Engine and Percy Ludgate's Analytical Machine, clearly distinguished between processing and memory (Babbage stored numbers as rotations of gears, while Ludgate stored numbers as displacements of rods in shuttles). This distinction was extended in the Von Neumann architecture, where the CPU consists of two main parts: The control unit and the arithmetic logic unit (ALU). The former controls the flow of data between the CPU and memory, while the latter performs arithmetic and logical operations on data.
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Data Storage: See also Filesystems
Computer memory and data storage types:
General
General:
Non-volatile memory
Non-volatile memory - Non-volatile
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- Solid-state storage (SSS)
- Flash memory is used in:
- Solid-state drive (SSD)
- Solid-state hybrid drive (SSHD)
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NVRAM
Early-stage NVRAM
Early-stage NVRAM
Analog recording
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- Digital Data Storage (DDS)
Optical storage
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- Compact Disc Digital Audio (CDDA)
In development
Historical
- Paper data storage (1725)
- Punched card (1725)
- Punched tape (1725)
- Drum memory (1932)
- Magnetic-core memory (1949)
- Plated-wire memory (1957)
- Core rope memory (1960s)
- Thin-film memory (1962)
- Disk pack (1962)
- Twistor memory (~1968)
- Bubble memory (~1970)
- Floppy disk (1971)
(navbar_storage - See also navbar_memory, navbar_filesystems, navbar_boot)
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