Why 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 data 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 hard disk 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 hard disk 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.
Why your computer cannot find your file and what happens when data is overwritten
You
cannot find your file and sometimes, you take your computer into a
professional who is skilled in laptop data recovery or hard disk
recovery and they cannot find your files either. If your data has been
overwritten, the best professional in the world, even if they are good
at Raid data recovery, cannot help you. Your computer may not find
data because it has written over the stored data. The files are located
using a table on your computer and rather than delete the information
in the file, your computer marks the space where the file is as vacant.
By doing this, it is able to write over the existing data and this is
why the best Raid data recovery specialist or hard disk recovery
professional cannot retrieve your files. The operating system writes
over old data with new data, essentially deleting it.
Laptop data recovery is a long shot after data is overwritten
Your
information may be recoverable if it has been overwritten. If data has
been overwritten, the magnetic domains are changed through
re-magnetization. The process is not reversible and it is slim
recovering data because it would require the use of a magnetic force
microscope.
