hard disc - definitie. Wat is hard disc
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Wat (wie) is hard disc - definitie

DATA STORAGE DEVICE
Hard drive; Hard disk drive functioning; Hard-disk; Harddisk; Hard disc; Harddisc; Hard Disk; Hard disks; Hard drives; Hard disc drive; Harddrive; Hard disk drives; Fixed disk; Pocket hard drive; Hard Drives; External hard drive; Hard file; External hard disk; Disk Overhead; External Hard Drive; External HDD; Laptop hard drive; Access arm; Actuator arm; External Hard Drives; Hard disk interfaces; Hard Disks; Hard Disk Drive; PC hard disks; Hard disk; Travel drive; The binary effect; USB hard disk; 2.5 inch hard drive; Usb hard disk; Enterprise disk drive; Hard disk parameters; Hard drive capacity; Fixed disk drive; External hard disk drive; Fixed drive; HDD Thermometer; ExternalHDD; Femto Slider; Spindle (computer); External volumes; Portable hard drives; Portable hard disk; Portable hard disk drive; External hard drives; Disk structure; Internal hard drive; Hard-disk drive; Hard disk drive spindle; Disk drive spindle; Portable hard drive; Hard disk drive actuator; Spindle (hard disk drive); Hard disk error rates and handling; Disk subsystem; Portable drive; External removable drive; External removable hard disk drive; External portable hard disk drive; External portable drive; USB hard disk drive; Portable USB hard disk; Portable USB hard disk drive; HDD form factor; Rigid disk drive; Hard-Drive; PowerChoice; Hard disk driver; Magnetic disk memory; Hard disk drive error rates and handling; 🖴; Magnetic hard drive; Rotating iron; Rotating rust; Hard disk drive form factor; Hard disk storage; Rotational media
  • 2.5-inch SATA drive on top of 3.5-inch SATA drive, showing close-up of (7-pin) data and (15-pin) power connectors
  • A newer 2.5-inch (63.5 mm) 6,495 MB HDD compared to an older 5.25-inch full-height 110 MB HDD
  • Recording of single magnetisations of bits on a 200&nbsp;MB HDD-platter (recording made visible using CMOS-MagView).<ref name="AutoMK-9" />
  • Diagram of HDD manufacturer consolidation
  • access-date= December 1, 2019 }}</ref>
  • read-write head]], showing the side facing the platter
  • Video of modern HDD operation (cover removed)
  • A disassembled and labeled 1997 HDD lying atop a mirror
  • An HDD with disks and motor hub removed, exposing copper-colored stator coils surrounding a bearing in the center of the spindle motor. The orange stripe along the side of the arm is a thin printed-circuit cable, the spindle bearing is in the center and the actuator is in the upper left.
  • Close-up of an HDD head resting on a disk platter; its mirror reflection is visible on the platter surface. Unless the head is on a landing zone, the heads touching the platters while in operation can be catastrophic.
  • Diagram labeling the major components of a computer HDD
  • An overview of how HDDs work
  • Hot-swappable]] HDD enclosure
  • Head stack with an actuator coil on the left and read/write heads on the right
  • Internals of a 2.5-inch laptop hard disk drive
  • Longitudinal recording (standard) & [[perpendicular recording]] diagram
  • 2022}}, Seagate offers capacities up to 20TB.
  • Seagate]] HDD that used the [[Parallel ATA]] interface
  • 8-, 5.25-, 3.5-, 2.5-, 1.8- and 1-inch HDDs, together with a ruler to show the size of platters and read-write heads
  • Destroyed hard disk, glass platter visible
  • Two high-end consumer SATA 2.5-inch 10,000&nbsp;rpm HDDs, factory-mounted in 3.5-inch adapter frames
  • Two 2.5" external USB hard drives

Hard (Zürich)         
  • Hard and ''Hardau'' buildings as seen from [[Uetliberg]] (November 2013)
QUARTER OF THE CITY OF ZURICH, SWITZERLAND
Hard (Zuerich); Hard (Zurich); Zürich-Hard
Hard is a quarter in the district 4 of Zürich. It was formerly a part of Aussersihl municipality, which was incorporated into Zürich in 1893.
hard disk         
(hard disks)
A computer's hard disk is a stiff magnetic disk on which data and programs can be stored.
N-COUNT
fixed disk         
<storage> A hard disk which is not a removable disk.

Wikipedia

Hard disk drive

A hard disk drive (HDD), hard disk, hard drive, or fixed disk, is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid rapidly rotating platters coated with magnetic material. The platters are paired with magnetic heads, usually arranged on a moving actuator arm, which read and write data to the platter surfaces. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored and retrieved in any order. HDDs are a type of non-volatile storage, retaining stored data when powered off. Modern HDDs are typically in the form of a small rectangular box.

Introduced by IBM in 1956, HDDs were the dominant secondary storage device for general-purpose computers beginning in the early 1960s. HDDs maintained this position into the modern era of servers and personal computers, though personal computing devices produced in large volume, like cell phones and tablets, rely on flash memory storage devices. More than 224 companies have produced HDDs historically, though after extensive industry consolidation most units are manufactured by Seagate, Toshiba, and Western Digital. HDDs dominate the volume of storage produced (exabytes per year) for servers. Though production is growing slowly (by exabytes shipped), sales revenues and unit shipments are declining because solid-state drives (SSDs) have higher data-transfer rates, higher areal storage density, somewhat better reliability, and much lower latency and access times.

The revenues for SSDs, most of which use NAND flash memory, slightly exceeded those for HDDs in 2018. Flash storage products had more than twice the revenue of hard disk drives as of 2017. Though SSDs have four to nine times higher cost per bit, they are replacing HDDs in applications where speed, power consumption, small size, high capacity and durability are important. As of 2019, the cost per bit of SSDs is falling, and the price premium over HDDs has narrowed.

The primary characteristics of an HDD are its capacity and performance. Capacity is specified in unit prefixes corresponding to powers of 1000: a 1-terabyte (TB) drive has a capacity of 1,000 gigabytes (GB; where 1 gigabyte = 1 billion (109) bytes). Typically, some of an HDD's capacity is unavailable to the user because it is used by the file system and the computer operating system, and possibly inbuilt redundancy for error correction and recovery. There can be confusion regarding storage capacity, since capacities are stated in decimal gigabytes (powers of 1000) by HDD manufacturers, whereas the most commonly used operating systems report capacities in powers of 1024, which results in a smaller number than advertised. Performance is specified as the time required to move the heads to a track or cylinder (average access time), the time it takes for the desired sector to move under the head (average latency, which is a function of the physical rotational speed in revolutions per minute), and finally the speed at which the data is transmitted (data rate).

The two most common form factors for modern HDDs are 3.5-inch, for desktop computers, and 2.5-inch, primarily for laptops. HDDs are connected to systems by standard interface cables such as PATA (Parallel ATA), SATA (Serial ATA), USB or SAS (Serial Attached SCSI) cables.

Voorbeelden uit tekstcorpus voor hard disc
1. Ms Kelly said a private contractor to the Driving Standards Agency had said a hard disc drive had gone missing from its secure facility in Iowa City.
2. Industry sources said network switches, computer memory parts, hard disc drives and ink supplies were the most common components found on the black market.
3. Next Transport Secretary Ruth Kelly admits that a hard disc containing the records of three million learner drivers has gone missing.
4. The TV incorporates a hard disc drive and has the capability of storing up to 40 hours of digital standard–definition programming.
5. The new Everio G eliminates the need to carry tapes, discs or any media at all, yet can record up to 24 hours of video movie–quality through a built–in hard disc. «The built–in hard disc is an exciting innovation that offers consumers not only superior quality video recording capabilities, but also the convenience of not having to worry about tapes and discs,» Reda El–Hajj, GM, sales and marketing SATC said.