WebA hard disk drive ( HDD ), hard disk, hard drive, or fixed disk [b] 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.

WebDuring 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.

WebA hard disk drive ( HDD ), hard disk or hard drive, is a data storage device for computers which uses magnetic storage to store data. The capacity of a hard drive is usually measured in gigabytes (GB), however hard disk capacity can also be measured in terabytes when the capacity is over 1000 or 1024 gigabytes.

WebHard disk drives are accessed over one of a number of bus types, including parallel ATA, Serial ATA, SCSI, Serial Attached SCSI, and Fibre Channel. Bridge circuitry is sometimes used to connect hard disk drives to buses with which they cannot communicate natively, such as IEEE 1394, USB, SCSI, NVMe and Thunderbolt.

WebThe Macintosh Hard Disk 20 was the first hard drive developed by Apple Computer specifically for use with the Macintosh 512K. Introduced on September 17, 1985, it was part of Apple's long-awaited solution toward completing the Macintosh Office announced in January 1985. It would be over a year more before Apple would release the file server …

WebA hard disk recorder is a system that uses a high-capacity hard disk to record digital audio or digital video. Hard disk recording systems represent an alternative to reel-to-reel audio tape recording and video tape recorders, and provide non-linear editing capabilities unavailable using tape recorders. Audio HDR systems, which can be standalone or computer-based, …

WebDisk storage is a general category of storage mechanisms where data is recorded by various electronic, magnetic, optical, or mechanical changes to a surface layer of one or more rotating disks. A disk drive is a device implementing such a storage mechanism. Notable types are the hard disk drive containing a non-removable disk, the floppy disk …

WebAt least 223 companies have manufactured hard disk drives. Most of that industry has vanished through bankruptcy or mergers and acquisitions. None of the first four entrants continue in the industry today. Only three manufacturers have survived: Seagate, Toshiba and Western Digital (WD)—all of which grew at least in part through mergers and …

WebHard disk is a non-volatile storage device that contains platters and magnetic disks rotating at high speeds. Non-volatile means the data retains when the computer shuts down. It is installed internally in our computer systems. Hard disk is located within a drive unit on the computer's motherboard and comprises one or more platters packed in an air-sealed …

WebIt is also sometimes called a semiconductor storage device, a solid-state device or a solid-state disk, [2] even though SSDs lack the physical spinning disks and movable read–write heads used in hard disk drives (HDDs) and floppy disks. [3] SSD also has rich internal parallelism for data processing. [4]