hard-disks - definition. What is hard-disks
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ASPECT OF HISTORY
History of hard disks; History of Hard drives; History of hard-disk drives; History of disk drives
  • Burroughs B-475 Disk Drive (circled)
  • Diagram of consolidation
  • Removable disk packs
  • A 2 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

hard disk         
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
(hard disks)
A computer's hard disk is a stiff magnetic disk on which data and programs can be stored.
N-COUNT
hard disk         
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
<storage> (In contrast to floppy disk) A magnetic disk data storage device where the disks are rigid and fixed to a central axle. They are usually packaged with associated read/write heads and electronics. Most hard disks are permanently connected to the drive (fixed disks) though there are also removable hard disks. See magnetic disk. (2007-06-14)
hard disk         
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
(also hard drive)
¦ noun Computing a rigid non-removable magnetic disk with a large data storage capacity.

ويكيبيديا

History of hard 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. After considering technologies such as wire matrices, rod arrays, drums, drum arrays, etc., the engineers at IBM's San Jose California laboratory invented the hard disk drive. The disk drive created a new level in the computer data hierarchy, then termed Random Access Storage but today known as secondary storage, less expensive and slower than main memory (then typically drums and later core memory) but faster and more expensive than tape drives.

The commercial usage of hard disk drives (HDD) began in 1957, with the shipment of a production IBM 305 RAMAC system including IBM Model 350 disk storage. US Patent 3,503,060 issued March 24, 1970, and arising from the IBM RAMAC program is generally considered to be the fundamental patent for disk drives.

Each generation of disk drives replaced larger, more sensitive and more cumbersome devices. The earliest drives were usable only in the protected environment of a data center. Later generations progressively reached factories, offices and homes, eventually becoming ubiquitous.

Disk media diameter was initially 24 inches, but over time it has been reduced to today's 3.5-inch and 2.5-inch standard sizes. Drives with the larger 24-inch- and 14-inch-diameter media were typically mounted in standalone boxes (resembling washing machines) or large equipment rack enclosures. Individual drives often required high-current AC power due to the large motors required to spin the large disks. Drives with smaller media generally conformed to de facto standard form factors.

The capacity of hard drives has grown exponentially over time. When hard drives became available for personal computers, they offered 5-megabyte capacity. During the mid-1990s the typical hard disk drive for a PC had a capacity of about 1 gigabyte. As of August 2020, desktop hard disk drives typically had a capacity of 1 to 8 terabytes, with the largest-capacity drives reaching 20 terabytes (single-disk drives, "dual" drives are available up to 24 TB). Smaller, laptop internal 2.5-inch drives, are available up to 5 TB.

Unit production peaked in 2010 at about 650 million units and has been in a slow decline since then.

أمثلة من مجموعة نصية لـ٪ 1
1. Police also found two hard disks full of similar files at her home.
2. Police also seized computers from his apartment and discovered that he had wiped their hard disks.
3. Authorities confiscated two computers, four hard disks, a pistol and 270 bullets.
4. He went home and removed hard disks from two desktop computers.
5. Mr Blair‘s chief fundraiser, Lord Levy, has already been arrested and his computer hard disks and files seized.