disk drives - definition. What is disk drives
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%ما هو (من)٪ 1 - تعريف

RECORDING (STORING) OF DIGITAL INFORMATION (DATA) IN A STORAGE MEDIUM
Record medium; Storage medium; Storage media; Disk drives; Recording medium; Recording media; Digital Storage; Data storage devices; Storage (computer science); Mass storage devices; Electronic storage; Recordable media; Universal Storage Media; Digital storage system; Data Storage; Data storage medium; Digital storage; Information storage; Digital data storage device; Digital Data Storage Device; Data storage technology; Data storing; Data recording; Data storage media; Data storage device; Enterprise storage; Stored data; Global data storage capacity
  • 1899}}. The [[phonograph cylinder]] is a storage medium. The phonograph may be considered a storage device especially as machines of this vintage were able to record on blank cylinders.
  • Various electronic storage devices
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  • reel-to-reel tape recorder]] (Sony TC-630), the recorder is data storage equipment and the [[magnetic tape]] is a data storage medium.

History of hard disk drives         
  • Burroughs B-475 Disk Drive (circled)
  • Diagram of consolidation
  • Removable disk packs
  • A 2&nbsp;TB Hard drive from 2011 with built in SATA interface
  • A partially disassembled IBM 350 (RAMAC)
  • Seagate 20 MB HDD and Western Digital Controller for PC
ASPECT OF HISTORY
History of hard disks; History of Hard drives; History of hard-disk drives; History of disk drives
In 1953, IBM recognized the immediate application for what it termed a "Random Access File" having high capacity and rapid random access at a relatively low cost."Proposal – Random Access File," A.
disk drive         
  • A CD-ROM (optical) disc drive
  • Comparison of several forms of disk storage showing tracks (not-to-scale); green denotes start and red denotes end.<br /><nowiki>*</nowiki> Some CD-R(W) and DVD-R(W)/DVD+R(W) recorders operate in ZCLV, CAA or CAV modes.
  • Three floppy disk drives
STORAGE MECHANISMS THAT RECORD DATA ON THE SURFACE OF ROTATING DISKS
Disk drive; Computer disk; Disk Drive; Disc storage; Disc drive; Disk memory; Disc Drive; Disk (storage device); Rotating-disk memory; Data storage disk; Computer disc
<hardware, storage> (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. 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)
disk drive         
  • A CD-ROM (optical) disc drive
  • Comparison of several forms of disk storage showing tracks (not-to-scale); green denotes start and red denotes end.<br /><nowiki>*</nowiki> Some CD-R(W) and DVD-R(W)/DVD+R(W) recorders operate in ZCLV, CAA or CAV modes.
  • Three floppy disk drives
STORAGE MECHANISMS THAT RECORD DATA ON THE SURFACE OF ROTATING DISKS
Disk drive; Computer disk; Disk Drive; Disc storage; Disc drive; Disk memory; Disc Drive; Disk (storage device); Rotating-disk memory; Data storage disk; Computer disc
¦ noun a device which allows a computer to read from and write on to computer disks.

ويكيبيديا

Data storage

Data storage is the recording (storing) of information (data) in a storage medium. Handwriting, phonographic recording, magnetic tape, and optical discs are all examples of storage media. Biological molecules such as RNA and DNA are considered by some as data storage. Recording may be accomplished with virtually any form of energy. Electronic data storage requires electrical power to store and retrieve data.

Data storage in a digital, machine-readable medium is sometimes called digital data. Computer data storage is one of the core functions of a general-purpose computer. Electronic documents can be stored in much less space than paper documents. Barcodes and magnetic ink character recognition (MICR) are two ways of recording machine-readable data on paper.

أمثلة من مجموعة نصية لـ٪ 1
1. Police searched his home and seized his computer‘s disk drives, Reporters without Borders said.
2. Still more territory is available on CDs and "external" hard disk drives that plug into PCs.
3. Norris diversified the firm into computer peripherals, including printers and disk drives, and data processing services.
4. The others include the purchase of UGS from EDS, the tech services company, and Seagate, the biggest maker of computer disk drives.
5. This was before we had access to disk drives/cassette backups, so you could never turn the power off or you would lose everything.