Lots of PC users believe that when one deletes a file and empties the trash bin, the information is completely erased. This however is not the truth Fact is that the data is still in the drive. All you actually do when you delete such info is to destroy the path leading the actual information. Nonetheless, one can still be able to erase info completely from their hard drive. There are actually three different ways to erase data from a computer hard drive. One can physically destroy the drive, use a hard drive eraser or use degaussing to clear the drive.
Degaussing means doing away with data completely. Degaussing is very popular considering the amount of sensitive information the needs to be permanently erased by various organizations. This method of doing away with data is different from others. Degaussing is not like simple deleting or formatting, it uses a unique technique to clear data completely. Here are some things you need to know about degaussing of a hard drive.
makes Use of Magnetic Fields
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Elimination or decrease of a magnetic field is what is termed as degaussing. This means it requires magnetic fields in order to erase information from magnetic storage devices such as discs and tapes. These devices have a fine coating of iron oxide and sometimes chromium oxide on the tape. During the process of degaussing, a very intense magnetic field is generated. The magnetic memory stored on either the chromium oxide or the iron oxide is done away with completely because of the immense power of the magnetic field produced. The data on the disc is completely destroyed as a result of the change in the tape’s magnetic field. During this process, the recorded data pattern is either removed or randomized. This explains why the data can never be recovered after the process.
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As per the WHO degaussing is completely harmless to people’s health. This means the exposure to magnetic fields during the process is not to cause alarm.
How Fast It is
The process of degaussing might sound complicated and slow. However, unlike the phonetics might insinuate, the data destruction process is one that is quite simple and quick.
Uses a Different Concept from Hard Drive Erasers
As already highlighted degaussing uses the help of a magnetic field to neutralize the magnetic charge in a drive. On the other hand, the so-called drive erasers simply overwrite the existing data making it impossible to forensically restore or decipher. Essentially, no erasing actually goes on in this process.