Hard disks are flat circular plates made of aluminum or glass and coated with a magnetic material. Hard disks for personal computers can store terabytes (trillions of bytes) of information. Data are stored on their surfaces in concentric tracks.
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Hard disks are the traditional hard drive design and usually cost less than SSD drives for equivalent storage and speed. However, they are ...
Hard disk drive
Computer peripheral
A hard disk drive, hard disk, hard drive, or fixed disk 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. Wikipedia
Inventor: IBM
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