A disk's surface is divided into concentric tracks (circles within circles), and the thinner the tracks, the more storage. The data bits are recorded as magnetic spots on the tracks in one ...

This has important implications as far as preservation goes – it’s best to record the flux changes themselves, and create an image of the exact magnetic state of the disk, and then process ...

Traditional hard disk drives use the direction of the magnetization of magnetic materials to store binary data. The magnetization can be controlled with magnetic field, light or electrical current ...