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- Hard_disk_drive abstract "A hard disk drive (HDD) is a data storage device used for storing and retrieving digital information using rapidly rotating disks (platters) coated with magnetic material. An HDD retains its data even when powered off. Data is read in a random-access manner, meaning individual blocks of data can be stored or retrieved in any order rather than sequentially. An HDD consists of one or more rigid ("hard") rapidly rotating disks (platters) with magnetic heads arranged on a moving actuator arm to read and write data to the surfaces.Introduced by IBM in 1956, HDDs became the dominant secondary storage device for general purpose computers by the early 1960s. Continuously improved, HDDs have maintained this position into the modern era of servers and personal computers. More than 200 companies have produced HDD units, though most current units are manufactured by Seagate, Toshiba and Western Digital. Worldwide revenues for HDD shipments are expected to reach US $33 billion in 2013, a decrease of approximately 12% from US $37.8 billion in 2012.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 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. Performance is specified by the time to move the heads to a file (Average Access Time) plus the time it takes for the file to move under its head (average latency, a function of the physical rotational speed in revolutions per minute) and the speed at which the file is transmitted (data rate).The two most common form factors for modern HDDs are 3.5-inch in desktop computers and 2.5-inch in laptops. HDDs are connected to systems by standard interface cables such as SATA (Serial ATA), USB or SAS (Serial attached SCSI) cables.As of 2014, the primary competing technology for secondary storage is flash memory in the form of solid-state drives (SSDs). HDDs are expected to remain the dominant medium for secondary storage due to predicted continuing advantages in recording capacity, price per unit of storage, write latency and product lifetime. However, SSDs are replacing HDDs where speed, power consumption and durability are more important considerations.".
- Hard_disk_drive thumbnail Laptop-hard-drive-exposed.jpg?width=300.
- Hard_disk_drive wikiPageExternalLink chmhdd.wetpaint.com.
- Hard_disk_drive wikiPageExternalLink seektime.html.
- Hard_disk_drive wikiPageExternalLink video-harddrive.htm.
- Hard_disk_drive wikiPageExternalLink formatLow-c.html.
- Hard_disk_drive wikiPageExternalLink article.html.
- Hard_disk_drive wikiPageExternalLink help.htm.
- Hard_disk_drive wikiPageID "13777".
- Hard_disk_drive wikiPageRevisionID "606745506".
- Hard_disk_drive align "right".
- Hard_disk_drive b "Minimizing hard disk drive failure and data loss".
- Hard_disk_drive caption "3".
- Hard_disk_drive caption "Toshiba 1 TB 2.5" external USB 2.0 HDD".
- Hard_disk_drive commons "Hard disk".
- Hard_disk_drive direction "vertical".
- Hard_disk_drive hasPhotoCollection Hard_disk_drive.
- Hard_disk_drive image "External hard drives.jpg".
- Hard_disk_drive image "Toshiba 1 TB External USB Hard Drive.jpg".
- Hard_disk_drive q "no".
- Hard_disk_drive s "no".
- Hard_disk_drive v "Hard disk drive".
- Hard_disk_drive width "250".
- Hard_disk_drive wikt "hard disk drive".
- Hard_disk_drive subject Category:American_inventions.
- Hard_disk_drive subject Category:Computer_peripherals.
- Hard_disk_drive subject Category:Computer_storage_devices.
- Hard_disk_drive subject Category:Computer_storage_media.
- Hard_disk_drive subject Category:File_system_management.
- Hard_disk_drive subject Category:Hard_disk_drives.
- Hard_disk_drive subject Category:Non-volatile_memory.
- Hard_disk_drive type Artifact100021939.
- Hard_disk_drive type ComputerPeripherals.
- Hard_disk_drive type ComputerStorageDevices.
- Hard_disk_drive type ComputerStorageMedia.
- Hard_disk_drive type Device103183080.
- Hard_disk_drive type DiskDrive103209666.
- Hard_disk_drive type Drive103243218.
- Hard_disk_drive type ElectronicEquipment103278248.
- Hard_disk_drive type Equipment103294048.
- Hard_disk_drive type HardDiskDrives.
- Hard_disk_drive type Instrumentality103575240.
- Hard_disk_drive type Medium106254669.
- Hard_disk_drive type MemoryDevice103744840.
- Hard_disk_drive type Object100002684.
- Hard_disk_drive type Peripheral103916720.
- Hard_disk_drive type PhysicalEntity100001930.
- Hard_disk_drive type StorageMedium106263762.
- Hard_disk_drive type Whole100003553.
- Hard_disk_drive comment "A hard disk drive (HDD) is a data storage device used for storing and retrieving digital information using rapidly rotating disks (platters) coated with magnetic material. An HDD retains its data even when powered off. Data is read in a random-access manner, meaning individual blocks of data can be stored or retrieved in any order rather than sequentially.".
- Hard_disk_drive label "Disco duro".
- Hard_disk_drive label "Disco rigido".
- Hard_disk_drive label "Disco rígido".
- Hard_disk_drive label "Disque dur".
- Hard_disk_drive label "Dysk twardy".
- Hard_disk_drive label "Festplattenlaufwerk".
- Hard_disk_drive label "Hard disk drive".
- Hard_disk_drive label "Harde schijf".
- Hard_disk_drive label "Жёсткий диск".
- Hard_disk_drive label "قرص صلب".
- Hard_disk_drive label "ハードディスクドライブ".
- Hard_disk_drive label "硬盘".
- Hard_disk_drive sameAs Pevný_disk.
- Hard_disk_drive sameAs Festplattenlaufwerk.
- Hard_disk_drive sameAs Σκληρός_δίσκος.
- Hard_disk_drive sameAs Disco_duro.
- Hard_disk_drive sameAs Disko_gogor.
- Hard_disk_drive sameAs Disque_dur.
- Hard_disk_drive sameAs Cakram_keras.
- Hard_disk_drive sameAs Disco_rigido.
- Hard_disk_drive sameAs ハードディスクドライブ.
- Hard_disk_drive sameAs 하드_디스크.
- Hard_disk_drive sameAs Harde_schijf.
- Hard_disk_drive sameAs Dysk_twardy.
- Hard_disk_drive sameAs Disco_rígido.
- Hard_disk_drive sameAs m.03l34.
- Hard_disk_drive sameAs Q4439.
- Hard_disk_drive sameAs Q4439.
- Hard_disk_drive sameAs Hard_disk_drive.
- Hard_disk_drive wasDerivedFrom Hard_disk_drive?oldid=606745506.
- Hard_disk_drive depiction Laptop-hard-drive-exposed.jpg.
- Hard_disk_drive isPrimaryTopicOf Hard_disk_drive.