A hard disk drive (HDD), hard disk, disk drive, or fixed disk is an electro-mechanical information storage space device that stores and also recovers electronic information utilizing magnetic storage space and one or more inflexible rapidly revolving platters coated with magnetic material. The platters are coupled with magnetic heads, generally arranged on a relocating actuator arm, which reviewed and compose data to the plate surface areas. Information is accessed in a random-access way, meaning that person blocks of information can be stored and also gotten in any order. HDDs are a type of non-volatile storage, retaining stored information also when powered off. Modern HDDs are generally in the type of a little rectangle-shaped box. Introduced by IBM in 1956, HDDs were the leading second storage tool for general-purpose computer systems starting in the early 1960s. HDDs maintained this placement into the contemporary age of servers as well as computers, though personal computer devic