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Hard disk drive

A hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical computer 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…

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Date invented
December 24, 1954; 71 years ago (1954-12-24)[c]
Invented by
IBM team led by Rey Johnson

Topics to explore

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Overview

History

Technology

Capacity

Form factors

Performance characteristics

Access and interfaces

Integrity and failure

Market segments

Economy

Competition from SSDs

Advanced semantic analysis

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Map overview Semantic statistics

Hard disk drive

Nodes233
Edges232
Triples113
Avg. degree1.99
Density0.008584
Components1

How this topic connects Entity context

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Hard disk drive

Top relations

related to External links · 35
Hard disk drive → Archived October, Ariel Berkman, Data, February, Flexibility, Hard, Hard Disk Drive Power, Hard Disk Drives EncyclopediaVideo, Hard Drive's Service Areas, Hard Drives, HD, HDD, Helium, HGST, How, Inc, Information Sheet, January, Linux, Magnetic Recording
related to Calculation · 17
Hard disk drive → C/H/S, CHS, CKD, DASD, Furthermore, HDDs, IBM, In, LBA, Modern, Older IBM, SATA, Some, The, The C/H/S, This, When
related to Units · 16
Hard disk drive → By, GB, GB HDD, HDD, HDDs, However, In, Linux, Mac OS, MB, SI, Snow Leopard, Software, TB, The, The Microsoft Windows
related to Form factors · 12
Hard disk drive → Beginning, Digital's RK05, Fujitsu Eagle, HDDs, IBM, IBM's, In, Into, MB, RL01, The IBM, This
related to 1950s–1960s · 11
Hard disk drive → Access, Cylinder-mode, IBM, In, It, Model, Motion, RAMAC, The, Variants, While
related to Capacity · 4
Hard disk drive → Confusion, HDDs, TB, The
see also · 3
Hard disk drive → Automatic, Electronics, Object
Date invented · 1
Hard disk drive → December 24, 1954; 71 years ago (1954-12-24)[c]
Invented by · 1
Hard disk drive → IBM team led by Rey Johnson

Important terminology Word statistics

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Important terminology

disk data hdds drive drives platters hard hdd capacity magnetic storage heads used ibm per head density rate modern system

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Hard disk driveDate inventedDecember 24, 1954; 71 years ago (1954-12-24)[c]1.00infobox
Hard disk driveInvented byIBM team led by Rey Johnson1.00infobox
SATAinstance ofHDDs are connected to systems by standard interface cables0.80text
Corvus Systemsinstance ofThe subsystem was not sold under the drive manufacturer's name but under the subsystem manufacturer's name0.80text
Tallgrass Technologiesinstance ofThe subsystem was not sold under the drive manufacturer's name but under the subsystem manufacturer's name0.80text
or under the PC system manufacturer's name such as the Apple ProFile.The IBM PC XT in 1983 included an internal 10 MB HDDinstance ofThe subsystem was not sold under the drive manufacturer's name but under the subsystem manufacturer's name0.80text
storage of entertainment content.In the 2000sinstance offrom the mainframe computers of the late 1950s to most mass storage applications including computers and consumer applications0.80text
2010sinstance offrom the mainframe computers of the late 1950s to most mass storage applications including computers and consumer applications0.80text
NAND began supplanting HDDs in applications requiring portability or high performanceinstance offrom the mainframe computers of the late 1950s to most mass storage applications including computers and consumer applications0.80text
megabytesinstance ofthe total capacity of HDDs was given by manufacturers using SI decimal prefixes0.80text
drives/controllers with limited compatibilityinstance ofwith some minor exceptions0.80text
Western Digital Raptor but such drives have become much rarer as of 2016instance of000 rpm drives0.80text

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