Data is stored in form of tracks, spots and sectors. Hard disks, zip disks and floppy disks are common examples of magnetic disks. Magnetic storage is one of the most affordable ways to store large amounts of data and has been implemented using magnetic tape, floppy disks and hard disk drives. In 1956 the first magnetic hard drive (HD) was invented at…
Magnetic Disk: A magnetic disk is a storage device that uses a magnetization process to write, rewrite and access data.
Magnetic Disk. A magnetic disk have circular platters coated with magnetic material. Other articles where Magnetic disk is discussed: computer memory: Magnetic disk drives: Magnetic disks are coated with a magnetic material such as iron oxide.

Examples of Magnetic disks are hard disk, floppy disks, magnetic tapes etc. Magnetic Disk is a storage device and uses magnetization process for data processing like read/write/access operations. There are two types: hard disks made of rigid aluminum or glass, and removable diskettes made of flexible plastic. A disk's surface is divided into concentric tracks (circles within circles), and the thinner the tracks, the more storage. It is covered with a magnetic coating and stores data in the form of tracks, spots and sectors.