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1. WordNet® 3.0 (2006) |
magnetic disk
n 1: (computer science) a memory device consisting of a flat
disk covered with a magnetic coating on which information
is stored [syn: magnetic disk, magnetic disc, disk,
disc]
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2. The Collaborative International Dictionary of English v.0.48 |
magnetic disc \magnetic disc\, magnetic disk \magnetic disk\n.
A ditical memory device consisting of a flat disk covered
with a magnetic coating on which information is stored; a
hard disk, floppy disk, and diskette are typically
magnetic disks.
Syn: disk, disc.
[WordNet 1.5]
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3. The Free On-line Dictionary of Computing (30 December 2018) |
magnetic disk
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>.
(2007-06-14)
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Common Misspellings > |
magnetic disk amagnetic disk amgnetic disk mamgnetic disk agnetic disk mmagnetic disk mganetic disk maganetic disk mgnetic disk maagnetic disk mangetic disk magngetic disk manetic disk maggnetic disk magentic disk magnentic disk magetic disk magnnetic disk magnteic disk magneteic disk magntic disk magneetic disk magneitc disk magnetitc disk magneic disk magnettic disk magnetci disk magnetici disk magnetc disk magnetiic disk magneti cdisk magnetic cdisk magneti disk magneticc disk magneticd isk magnetic d isk magneticdisk magnetic disk magnetic idsk magnetic didsk magnetic isk magnetic ddisk magnetic dsik magnetic disik magnetic dsk magnetic diisk magnetic diks magnetic disks magnetic dik magnetic dissk magnetic diksk magnetic dis magnetic diskk jagnetic disk mjagnetic disk jmagnetic disk kagnetic disk mkagnetic disk kmagnetic disk lagnetic disk mlagnetic disk lmagnetic disk nagnetic disk mnagnetic disk nmagnetic disk agnetic disk m agnetic disk magnetic disk mqgnetic disk maqgnetic 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magnetikc disk magnetkic disk magnetlc disk magnetilc disk magnetlic disk magnetac disk magnetec disk magnetis disk magnetics disk magnetisc disk magnetid disk magneticd disk magnetidc disk magnetif disk magneticf disk magnetifc disk magnetix disk magneticx disk magnetixc disk magnetiv disk magneticv disk magnetivc disk magneti disk magnetic disk magneti c disk magnetic wisk magnetic dwisk magnetic wdisk magnetic eisk magnetic deisk magnetic edisk magnetic risk magnetic drisk magnetic rdisk magnetic sisk magnetic dsisk magnetic sdisk magnetic fisk magnetic dfisk magnetic fdisk magnetic xisk magnetic dxisk magnetic xdisk magnetic cisk magnetic dcisk magnetic cdisk magnetic visk magnetic dvisk magnetic vdisk magnetic isk magnetic d isk magnetic disk magnetic d8sk magnetic di8sk magnetic d8isk magnetic d*sk magnetic di*sk magnetic d*isk magnetic d9sk magnetic di9sk magnetic d9isk magnetic dusk magnetic diusk magnetic duisk magnetic dosk magnetic diosk magnetic doisk magnetic djsk magnetic dijsk magnetic djisk magnetic dksk magnetic diksk magnetic dkisk magnetic dlsk magnetic dilsk magnetic dlisk magnetic dask magnetic desk magnetic diqk magnetic disqk magnetic diqsk magnetic diwk magnetic diswk magnetic diwsk magnetic diek magnetic disek magnetic diesk magnetic diak magnetic disak magnetic diask magnetic didk magnetic disdk magnetic didsk magnetic dizk magnetic diszk magnetic dizsk magnetic dixk magnetic disxk magnetic dixsk magnetic dick magnetic disck magnetic dicsk magnetic di k magnetic dis k magnetic di sk magnetic disu magnetic disku magnetic disuk magnetic disi magnetic diski magnetic disik magnetic diso magnetic disko magnetic disok magnetic disj magnetic diskj magnetic disjk magnetic disl magnetic diskl magnetic dislk magnetic dism magnetic diskm magnetic dismk magnetic dis, magnetic disk, magnetic dis,k magnetic dis. magnetic disk. magnetic dis.k Definition commonly spelled as: Defanition or Defenition, Synonym as: Synonim, Sinonym or Sinonim, Thesaurus as: Thesorus or Thesauris, Dictionary as: Dictionery or Dictionry and Define is usually not misspelled. 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