Is It Not Possible To Easily Recover Data On A Hard Drive That Is Overwritten?

Many people may think that data are missing and a professional can still perform Raid data recovery or hard disk recovery. In reality, the data has not been removed. A computer hard drive does not know how to locate the data. The information, which tells your computer where to locate the data, is missing. This is also the reason why the best professionals who perform laptop data recovery or hard disk data recovery cannot locate important files after a drive has been reformatted.

How do professionals find information to perform hard disk recovery if you have not reformatted a drive and had it overwritten? These hard disk drives store information magnetically and do not require anyone monitoring the information on the drive. Those strings of data in eight 1’s and 0’s may look like gibberish, but a hard drive can use those 1’s and 0’s to keep stored data separate.

Hard drives use magnetism to store Information
Similar to a car battery, hard drives have magnets that have a plus and minus pole. The poles represent the binary code 1 and 0 is a computer uses. The HDD storage unit or platter contains a ferromagnetic surface and divides the binary codes into magnetic regions, called magnetic domains. Data is stored by the direction of the magnetism of these domains. The magnetic domains are magnetised in one of two directions and represent a 1 or 0.

Data is stored in two ways on a HDD unit. Before 2005, this data was recorded parallel to the disk surface, meaning the binary code was either recorded with left or right magnetism. This type of recording was called longitudinal recording. Around 2005 and later, this magnetism used to record binary code has been used to record segments being recorded vertically and perpendicular; it is called perpendicular recording. It adds a layer to the recording process and the magnetic domains are stored closer together.

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