Magnets in Hard Drives

Most computers use tiny magnets to store information within the hard drive. The hard disk on the inside of a computer is composed of small metal plates. There are tiny areas on these plates that can be made either magnetic or nonmagnetic, creating a code that the computer can turn into specific data, such as pictures, videos, and sounds.

Typically, there are a few neodymium magnets in the hard drive (both the drive and linear head motors) along with multiple electromagnets. Data is stored in the hard disk drives due to magnetism. The surface of the disk is coated with magnetic material that consists of billions or even trillions of tiny magnets.

What Types of Magnets are Used in Computers?

Permanent magnets are widely used in computers, including the hard disk, the floppy disk, and the CD driver head. There are about 4,000 tons of neodymium magnets (NdFeB) used in computer drivers annually, accounting for roughly 50% of the total Neodymium magnet sales! These are the most advanced commercialized permanent magnet materials that are used today, and since they come in several different grades it allows them to have a wide range of applications.

Other Uses for Magnets in Computers

While data storage is the primary use for magnets in computers, they are also used for other parts of the computer. Permanent magnets are used for speakers, and you can even check out our blog all about speaker magnets. Magnets are also used for the fan motors within the speaker since they use both electricity and magnetism to create motion. Optical disk drives use magnetism for the process of ejecting a disc, and cathode ray tubes (CRT) monitors use an electron beam that uses a magnet-powered electromagnetic field to help form the images on the screen. From data to sound to display, nearly every part of a computer relies on magnets.

For Permanent Magnets, Call Viona

Who would have thought magnets played such an important role in computers? At Viona Magnetics we are knowledgeable in the wide range of uses for permanent magnets. For all your magnet needs, complete our quote request form to get started today! Our sales team will contact you as soon as possible, or you can call us at 1-800-390-5650 for immediate assistance. Operations around the world choose Viona Magnetics for our expertise, product range, pricing flexibility, custom solutions, and more. If you need professional help with the application for your next project, we are happy to help!