Degaussing

Degaussing is the process of decreasing or eliminating a remnant magnetic field. It is possibly named after the Gauss unit of magnetism, which in turn is named after Carl Friedrich Gauss. Due to magnetic hysteresis it is generally not possible to reduce a magnetic field completely to zero, so degaussing typically induces a very small "known" field referred to as bias. Degaussing was originally applied to reduce ships' magnetic signatures during WWII. Degaussing is also used to reduce magnetic fields in CRT monitors and to destroy the data on magnetic media.

Read more about DegaussingDegaussing Ships' Hulls, Degaussing Monitors, Degaussing Magnetic Data Storage Media

Other articles related to "degaussing":

Data Remanence - Specific Methods - Degaussing
... Degaussing is the removal or reduction of a magnetic field of a disk or drive, using a device called a degausser that has been designed for the media being erased ... Applied to magnetic media, degaussing may purge an entire media element quickly and effectively ... Degaussing often renders hard disks inoperable, as it erases low-level formatting that is only done at the factory during manufacturing ...
Anti-computer Forensics - Artifact Wiping - Disk Degaussing / Destruction Techniques
... Disk degaussing is a process by which a magnetic field is applied to a digital media device ... Degaussing is rarely used as an anti-forensic method despite the fact that it is an effective means to ensure data has been wiped ... This is attributed to the high cost of degaussing machines, which are difficult for the average consumer to afford ...
Canvey Island - History - Modern Era - Second World War
... East Tilbury, Thorney Bay on the southern coast of the island was the site of a degaussing station built to monitor the effectiveness of the degaussing ... The structure is the last intact degaussing station on the north side of the river, and was still operating in 1974 ...
Degaussing Magnetic Data Storage Media - Irreversible Damage To Some Media Types
... Many forms of generic magnetic storage media can be reused after degaussing, including audio reel-to-reel tape, VHS videocassettes, and floppy disks ... modern hard drives and some tape backup drives, degaussing renders the magnetic media completely unusable and damages the storage system ... Degaussing indiscriminately removes not only the stored data but also the servo control data, and without the servo data the device is no longer able to determine where data is to be read ...
USS Surfbird (AM-383) - Service History - Degaussing Ship, 1957–1965
... She arrived in Japan on 12 February and began receiving degaussing equipment from the USS Ampere (ADG-11) ... she was redesignated from MSF-383 to a degaussing ship, ADG-383 ...