SSC MTS EXAM

Detailed explanation-1: -A hard disk drive (HDD), 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.

Detailed explanation-2: -The data is stored on the hard drive magnetically, so it stays on the drive even after the power supply is turned off. The term “hard drive” is actually short for “hard disk drive.” The term “hard disk” refers to the actual disks inside the drive.

Detailed explanation-3: -The part of the hard disk that stores the data is known as platter. Platters are circular disk made of a non magnetic material typically aluminum alloy, glass or ceramic and are coated with a thin layer (10-20nm) of a magnetic material.