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In computing, mass storage refers to storage of large amounts of information in a persisting and machine-readable fashion. Storage media for mass storage include hard discs, floppy disks, flash memory, optical discs, magneto-optical discs, drum memory, magnetic tape, punched tape (historic) and holographic memory (experimental). It does not include random access memory, which is volatile i.e. it loses its contents after power loss. Memory (Random Access Memory) Look up computing in Wiktionary, the free dictionary. ...
The term machine-readable or computer-readable refers to information encoded in a form which can be read or understood by a machine / computer and interpreted by hardware and / or software. ...
The terms storage (U.K.) or memory (U.S.) refer to the parts of a digital computer that retain physical state (data) for some interval of time, possibly even after electrical power to the computer is turned off. ...
Typical hard drives of the mid-1990s. ...
A floppy disk is a data storage device that is composed of a disk of thin, flexible (floppy) magnetic storage medium encased in a square or rectangular plastic shell. ...
A USB flash drive. ...
The optical lens of a compact disc drive. ...
!!! Double article, please see also Magneto-optical drive !!! Magneto-Optical disc is an optical disc format that uses a combination of optical and magnetic technologies. ...
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Compact audio cassette Magnetic tape is a non-volatile storage medium consisting of a magnetic coating on a thin plastic strip. ...
A roll of punched tape Punched tape is an old-fashioned form of data storage, consisting of a long strip of paper in which holes are punched to store data. ...
Holographic memory is a technique that can store information at high density inside crystals or photopolymers. ...
Random access memory (usually known by its acronym, RAM) is a type of data storage used in computers. ...
A drive is a peripheral device attached to a computer to access the information stored on a mass storage medium. In some types of drive, the storage medium is permanently sealed inside the device. In others, the medium can be replaced with varying levels of difficulty. Also, some drives with permanently attached media are designed to be portable as a whole. In computer hardware, a peripheral device is any device attached to a computer in order to expand its functionality. ...
The NASA Columbia Supercomputer. ...
Mass storage devices are characterized by:
- Transfer speed
- Seek time
- Cost
- Capacity
Today, magnetic disks lead on all four and have come to be the dominant mass storage medium. Optical discs, however, are used almost exclusively in large-scale distribution of retail software, music and movies because of the cost and manufacturing efficiency of the moulding process used to produce DVD and compact discs. Flash memory (in particular, NAND flash) holds a niche in removable storage and on embedded devices such cell phones because of its portability and low power consumption. DVD (Digital Versatile Disc or Digital Video Disc) is an optical disc storage media format that can be used for data storage, including movies with high video and sound quality. ...
A Compact Disc or CD is an optical disc used to store digital data, originally developed for storing digital audio. ...
A USB flash drive. ...
A USB flash drive. ...
Motorola T2288 mobile phone A mobile phone is a portable electronic device which behaves as a normal telephone whilst being able to move over a wide area (compare cordless phone which acts as a telephone only within a limited range). ...
Usage
Mass storage devices used in desktop and most server computers typically have their data organized in a file system. The choice of file system is often important in maximizing the performance of the device: general purpose file systems such as NTFS and HFS, for example, do poorly on slow-seeking optical storage such as compact discs. In computing, a file system (often also written as filesystem) is a method for storing and organizing computer files and the data they contain to make it easy to find and access them. ...
NTFS is the standard file system of Windows NT, including its later versions Windows 2000, Windows XP, Windows Server 2003, and Windows Vista. ...
HFS may stand for: Hierarchical File System Washington High Fidelity Stereo (WHFS) Hemifacial spasm HFS Group - A loan company based in Macclesfield, UK. High-fructose syrup This page concerning a three-letter acronym or abbreviation is a disambiguation page — a navigational aid which lists other pages that might otherwise share...
Some relational databases can also be deployed on mass storage devices without an intermediate file system or storage manager. Oracle and MySQL, for example, can store table data directly on raw block devices. An Oracle database consists of a collection of data managed by an Oracle database management system. ...
MySQL (pronounced ) is a multithreaded, multi-user SQL database management system (DBMS)[1] which has, according to MySQL AB, more than 10 million installations. ...
On removable media, archive formats (which pack file data end-to-end) are sometimes used instead of file systems because they are more portable and simpler to stream. Removable media are transportable drives or disks that can be moved easily from one computer to another. ...
In computer science, porting is the process of adapting software so that an executable program can be created for a computing environment that is different from the one for which it was originally designed (e. ...
Streaming media is multimedia that is continuously received by, and normally displayed to, the end-user while it is being delivered by the provider. ...
On embedded computers, it is common to memory map the contents of a mass storage device (usually ROM or flash memory) so that its contents can be traversed as in-memory data structures or executed directly by programs. Memory-mapped I/O (MMIO) and port I/O (also called port-mapped I/O or PMIO) are two complementary methods of performing input/output between the CPU and I/O devices in a computer. ...
Mass storage types The design of computer architectures and operating systems are often dictated by the mass storage and bus technology of their time. Desktop operating systems such as Windows are now so closely tied to the performance characteristics of magnetic disks that it is difficult to deploy them on other media like flash memory without running into space constraints, suffering serious performance problems or breaking applications. A typical vision of a computer architecture as a series of abstraction layers: hardware, firmware, assembler, kernel, operating system and applications (see also Tanenbaum 79). ...
// An operating system (OS) is a set of computer programs that manage the hardware and software resources of a computer. ...
In computer architecture, a bus is a subsystem that transfers data or power between computer components inside a computer or between computers and typically is controlled by device driver software. ...
Microsoft Windows is the name of several families of proprietary software operating systems by Microsoft. ...
References - Patterson, Dave (2003). "A Conversation With Jim Gray". ACM Queue. (A discussion of recent trends in mass storage.)
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