magnetic medium - traduction vers grec
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  1. Dictionnaires
  2. Dictionnaire anglais-grec
  3. magnetic medium

magnetic medium - traduction vers grec

STORAGE OF DATA ON A MAGNETIZED MEDIUM
Magnetic medium; Magnetic recording; Magnetic disk; Magnetic Disk; Magnetic Recording; Magnetic media; Magnetic Media; Magnetic Storage; Magnetic disk access time; Longitudinal magnetic recording; Longitudinal Magnetic Recording; Longitudinal recording; Longitudinal Recording; Shingled Recording; Magnetic data storage; Longitudinal recording mode; Horizontal recording mode; Horizontal recording; History of magnetic storage; 100 tpi; 48 tpi; 96 tpi
  • HP-41-series]] (from 1979) could store data via an external magnetic tape storage device on [[microcassette]]s
  • Hard drives use magnetic memory to store giga- and terabytes of data in computers.
  • Longitudinal recording and [[perpendicular recording]], two types of writing heads on a hard disk

magnetic medium         
μαγνητικό απόθεμα
core memory         
  • Diagram of a 4×4 plane of magnetic core memory in an X/Y line coincident-current setup. X and Y are drive lines, S is sense, Z is inhibit. Arrows indicate the direction of current for writing.
  • A 10.8×10.8 cm plane of magnetic core memory with 64 x 64 bits (4 Kb), as used in a [[CDC 6600]]. Inset shows ''word line'' architecture with two wires per bit
  • Close-up of a core plane. The distance between the rings is roughly 1 mm (0.04 in). The green horizontal wires are X; the Y wires are dull brown and vertical, toward the back. The sense wires are diagonal, colored orange, and the inhibit wires are vertical twisted pairs.
  • One of three inter-connected modules that make up an Omnibus-based PDP-8 core memory plane. This is the middle of the three and contains the array of actual ferrite cores.
  • One of three inter-connected modules that make up an Omnibus-based (PDP 8/e/f/m) PDP-8 core memory plane.
  • One of three inter-connected modules that make up an Omnibus-based PDP-8 core memory plane.
  • [[Project Whirlwind]] core memory
  • Diagram of the [[hysteresis]] curve for a magnetic memory core during a read operation. Sense line current pulse is high ("1") or low ("0") depending on original magnetization state of the core.
PREDOMINANT FORM OF RANDOM-ACCESS COMPUTER MEMORY FOR 20 YEARS BETWEEN ABOUT 1955 AND 1975
Ferrite core memory; Ferrite-core memory; Core store; Magnetic-Core Storage; Ferrite ram; Magnetic core storage; Core Memory; Main store; Magnetic core memory; Core memory; Core memories
μνήμη πυρήνων
μαγνητικό απόθεμα      
magnetic medium

Définition

magnetic disk
<storage> A flat rotating disc covered on one or both sides with magnetisable material. The two main types are the {hard disk} and the floppy disk. Data is stored on either or both surfaces of discs in concentric rings called "tracks". Each track is divided into a whole number of "sectors". Where multiple (rigid) discs are mounted on the same axle the set of tracks at the same radius on all their surfaces is known as a "cylinder". Data is read and written by a disk drive which rotates the discs and positions the read/write heads over the desired track(s). The latter radial movement is known as "seeking". There is usually one head for each surface that stores data. To reduce rotational latency it is possible, though expensive, to have multiple heads at different angles. The head writes binary data by magnetising small areas or "zones" of the disk in one of two opposing orientations. It reads data by detecting current pulses induced in a coil as zones with different magnetic alignment pass underneath it. In theory, bits could be read back as a time sequence of pulse (one) or no pulse (zero). However, a run of zeros would give a prolonged absence of signal, making it hard to accurately divide the signal into individual bits due to the variability of motor speed. Run Length Limited is one common solution to this clock recovery problem. High speed disks have an access time of 28 milliseconds or less, and low-speed disks, 65 milliseconds or more. The higher speed disks also transfer their data faster than the slower speed units. The disks are usually aluminium with a magnetic coating. The heads "float" just above the disk's surface on a current of air, sometimes at lower than atmospheric pressure in an air-tight enclosure. The head has an aerodynamic shape so the current pushes it away from the disk. A small spring pushes the head towards the disk at the same time keeping the head at a constant distance from the disk (about two microns). Disk drives are commonly characterised by the kind of interface used to connect to the computer, e.g. ATA, IDE, SCSI. See also winchester. Compare magnetic drum, {compact disc}, optical disk, magneto-optical disk. Suchanka's PC-DISK library (http://pc-disk.de/). (2007-06-14)
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Wikipédia

Magnetic storage

Magnetic storage or magnetic recording is the storage of data on a magnetized medium. Magnetic storage uses different patterns of magnetisation in a magnetizable material to store data and is a form of non-volatile memory. The information is accessed using one or more read/write heads.

Magnetic storage media, primarily hard disks, are widely used to store computer data as well as audio and video signals. In the field of computing, the term magnetic storage is preferred and in the field of audio and video production, the term magnetic recording is more commonly used. The distinction is less technical and more a matter of preference. Other examples of magnetic storage media include floppy disks, magnetic tape, and magnetic stripes on credit cards.

https://en.wikipedia.org/wiki/Magnetic storage
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