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Difference between Magnetic Disk and Optical Disk

  • Last Updated : 02 Sep, 2019

The Magnetic disk and Optical disk are the storage devices that provide a way to store data for a long duration. Both are categorized under the category of secondary storage devices.

Magnetic disk:
A magnetic disk is a storage device that uses a magnetization process to read, write, rewrite and access data. The Magnetic disk is made of a set of circular platters. It is covered with a magnetic coating and stores data in the form of tracks, spots, and sectors. Hard disks, zip disks, and floppy disks are common examples of magnetic disks. The number of bits stored on each track does not change by using the simplest constant angular velocity.

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Optical disk
An optical disk is any computer disk that uses optical storage techniques and technology to read and write data. It is a storage device in which optical (light) energy is used. It is a computer storage disk that stores data digitally and uses laser beams to read and write data. It uses the optical technology in which laser light is centred to the spinning disks.

Difference Between Magnetic Disk and Optical Disk:

1Media type used is Muiltiple fixed diskMedia type used is Single removable disk
2Intermediate signal to noise ratioExcellent signal to noise ratio
3Sample rate is LowSample rate is High
4Implementated where data is randomly accessed.Implementated in streaming files.
5Only one disk can be used at a timeMass replication is possible
6Tracks in the magnetic disk are generally circularIn optical disk the tracks are constructed spirally.
7The data in the magnetic disk is randomly accessed.In the optical disk, the data is sequentially accessed.
8In the magnetic disk, only one disk is accessed at a time.Optical disk allows mass replication

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