| slovo | definícia |
disk drive
(encz) | disk drive,disková jednotka luke |
disk drive
(gcide) | Drive \Drive\ (dr[imac]v), n.
1. The act of driving; a trip or an excursion in a carriage,
as for exercise or pleasure; -- distinguished from a ride
taken on horseback.
[1913 Webster]
2. A place suitable or agreeable for driving; a road prepared
for driving.
[1913 Webster]
3. Violent or rapid motion; a rushing onward or away; esp., a
forced or hurried dispatch of business.
[1913 Webster]
The Murdstonian drive in business. --M. Arnold.
[1913 Webster]
4. In type founding and forging, an impression or matrix,
formed by a punch drift.
[1913 Webster]
5. A collection of objects that are driven; a mass of logs to
be floated down a river. [Colloq.]
Syn: See Ride.
[1913 Webster]
6. a private road; a driveway.
[PJC]
7. a strong psychological motivation to perform some
activity.
[PJC]
8. (Computers) a device for reading or writing data from or
to a data storage medium, as a disk drive, a {tape
drive}, a CD drive, etc.
[PJC]
9. an organized effort by a group to accomplish a goal within
a limited period of time; as, a fund-raising drive.
[PJC]
10. a physiological function of an organism motivating it to
perform specific behaviors; as, the sex drive.
[PJC]
11. (Football) the period during which one team sustains
movement of the ball toward the opponent's goal without
losing possession of the ball; as, a long drive
downfield.
[PJC]
12. an act of driving a vehicle, especially an automobile;
the journey undertaken by driving an automobile; as, to
go for a drive in the country.
[PJC]
13. the mechanism which causes the moving parts of a machine
to move; as, a belt drive.
[PJC]
14. the way in which the propulsive force of a vehicle is
transmitted to the road; as, a car with four-wheel drive,
front-wheel drive, etc.
[PJC] |
disk drive
(wn) | disk drive
n 1: computer hardware that holds and spins a magnetic or
optical disk and reads and writes information on it [syn:
disk drive, disc drive, hard drive, {Winchester
drive}] |
disk drive
(foldoc) | disk drive
FDD
floppy disk drive
floppy drive
(Or "hard disk drive", "hard drive",
"floppy disk drive", "floppy drive") A peripheral device
that reads and writes hard disks or floppy disks. The
drive contains a motor to rotate the disk at a constant rate
and one or more read/write heads which are positioned over the
desired track by a servo mechanism. It also contains the
electronics to amplify the signals from the heads to normal
digital logic levels and vice versa.
In order for a disk drive to start to read or write a given
location a read/write head must be positioned radially over
the right track and rotationally over the start of the right
sector.
Radial motion is known as "seeking" and it is this which
causes most of the intermittent noise heard during disk
activity. There is usually one head for each disk surface and
all heads move together. The set of locations which are
accessible with the heads in a given radial position are known
as a "cylinder". The "seek time" is the time taken to
seek to a different cylinder.
The disk is constantly rotating (except for some floppy disk
drives where the motor is switched off between accesses to
reduce wear and power consumption) so positioning the heads
over the right sector is simply a matter of waiting until it
arrives under the head. With a single set of heads this
"rotational latency" will be on average half a revolution
but some big drives have multiple sets of heads spaced at
equal angles around the disk.
If seeking and rotation are independent, access time is seek
time + rotational latency. When accessing multiple tracks
sequentially, data is sometimes arranged so that by the time
the seek from one track to the next has finished, the disk has
rotated just enough to begin accessing the next track.
See also sector interleave.
Early disk drives had a capacity of a few megabytes and were
housed inside a separate cabinet the size of a washing
machine. Over a few decades they shrunk to fit a terabyte
or more in a box the size of a paperback book.
The disks may be removable disks; floppy disks always are,
removable hard disks were common on mainframes and
minicomputers but less so on microcomputers until the mid
1990s(?) with products like the Zip Drive.
A CD-ROM drive is not usually referred to as a disk drive.
Two common interfaces for disk drives (and other devices) are
SCSI and IDE. ST-506 used to be common in
microcomputers (in the 1980s?).
(1997-04-15)
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| | podobné slovo | definícia |
full up ready to burst (about hard disk drives!)
(czen) | Full Up Ready To Burst (about hard disk drives!),FURTB[zkr.] |
floppy disk drive
(foldoc) | disk drive
FDD
floppy disk drive
floppy drive
(Or "hard disk drive", "hard drive",
"floppy disk drive", "floppy drive") A peripheral device
that reads and writes hard disks or floppy disks. The
drive contains a motor to rotate the disk at a constant rate
and one or more read/write heads which are positioned over the
desired track by a servo mechanism. It also contains the
electronics to amplify the signals from the heads to normal
digital logic levels and vice versa.
In order for a disk drive to start to read or write a given
location a read/write head must be positioned radially over
the right track and rotationally over the start of the right
sector.
Radial motion is known as "seeking" and it is this which
causes most of the intermittent noise heard during disk
activity. There is usually one head for each disk surface and
all heads move together. The set of locations which are
accessible with the heads in a given radial position are known
as a "cylinder". The "seek time" is the time taken to
seek to a different cylinder.
The disk is constantly rotating (except for some floppy disk
drives where the motor is switched off between accesses to
reduce wear and power consumption) so positioning the heads
over the right sector is simply a matter of waiting until it
arrives under the head. With a single set of heads this
"rotational latency" will be on average half a revolution
but some big drives have multiple sets of heads spaced at
equal angles around the disk.
If seeking and rotation are independent, access time is seek
time + rotational latency. When accessing multiple tracks
sequentially, data is sometimes arranged so that by the time
the seek from one track to the next has finished, the disk has
rotated just enough to begin accessing the next track.
See also sector interleave.
Early disk drives had a capacity of a few megabytes and were
housed inside a separate cabinet the size of a washing
machine. Over a few decades they shrunk to fit a terabyte
or more in a box the size of a paperback book.
The disks may be removable disks; floppy disks always are,
removable hard disks were common on mainframes and
minicomputers but less so on microcomputers until the mid
1990s(?) with products like the Zip Drive.
A CD-ROM drive is not usually referred to as a disk drive.
Two common interfaces for disk drives (and other devices) are
SCSI and IDE. ST-506 used to be common in
microcomputers (in the 1980s?).
(1997-04-15)
|
hard disk drive
(foldoc) | hard disk drive
hard drive
HDD
(HDD) A disk drive used to read and write {hard
disks}.
(1995-03-14)
|
optical disk drive
(foldoc) | optical disk drive
optical disc drive
optical drive
optical storage
(Or "optical disc drive", "optical storage") A generic
term for any device that reads and/or writes optical media,
i.e. compact discs, DVDs and/or Blu-ray discs or future
media that uses light (from a small laser) to read data off a
removable, rotating disk.
At least one such drive is commonly installed in most {personal
computers} to allow them to play and/or record audio and video
media and load and store data such as program installers.
The floppy disk has been replaced by optical media due to its
vastly greater capacity, e.g. 50,000 megabytes for a dual-layer
blu-ray disc compared with 1.5 megabytes for a floppy (over
30,000 times as much).
(2014-04-27)
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