Hard disk drive
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A hard disk drive, 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 rapid
A partially disassembled IBM 350 hard disk drive (RAMAC)
Hitachi 500GB 3.5" drive, 2011, opened to show the disk platters and read/write arm
A 3.5" and a 2.5" HDD with front covers removed to show their internals
Recording of single magnetisations of bits on a 200 MB HDD-platter (recording made visible using CMOS-MagView)
Magnetic storage
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Magnetic storage or magnetic recording is the storage of data on a magnetized medium. Magnetic storage uses different patterns of magnetisation in a magnetizable material to store data and is a form o
Hard disk drive
…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…
The programmable calculators of the HP-41-series (from 1979) could store data via an external magnetic tape storage device on Mini-Cassettes.
Hard drives use magnetic memory to store giga- and terabytes of data in computers.