How to completely erase data from the hard disk
Technologies / / December 19, 2019
Windows family of operating systems, the most popular is arranged so that it has no built-in reliable (the final, irreversible) deletion of data from the hard disk.
To put it simply, deleting a file followed by purification of the basket does not actually erase the information from the media, and even the most simple and free tool will allow a virtually 100% chance to restore all data.
Than it threatens simple user? For any act of transferring its hard disk to another person, whether the gift or sale, you run the risk that the whole private information stored on the disk and the foresight to "Remote" will be available to the new owner.
Moreover, by using data recovery tools that people can find out there is, what you yourself have already forgotten, since deleted some old files for a long time, and here they are again emerge.
Features of data storage on hard drives caused the entire science of proper removal of information can not be restored. At the same time we developed and advanced recovery tools, including for "interesting" situations of violation of people and organizations of various laws. In general, if the script goes beyond the usual custom of the situation, you should not rely on any program - just complete physical destruction (Sledgehammer + acid) will provide final disposal of information, and for a simple scripting specialized software is enough.
We do not think that for such a rare and demand a specific task you need to buy some paid product, the more the web have pretty advanced free solutions that have proven efficiency. We consider the process of reliable data deletion using free tools Darik's Boot and Nuke (DBAN). Its charm lies in the presence of several disk cleanup methods that provide different levels of reliability removal, as well as in the way of its use.
DBAN distributed as ISO-image, which is sufficient to write to any ingot, thus creating a boot disk.
Plus, this approach is the ability to quickly and efficiently clean up even the system drive the computer on which the operating system, or help another person, just come to him with this disc.
The simplest method of destroying the original file is its complete re-byte # FF, that is a bit mask of eight binary units (11111111), zeros or any other arbitrary number, thereby making it impossible to restore the software available to the user software.
Actually, from this work and all modern utilities (from hardware recovery techniques it may not help).
DBAN Interactive mode allows the user to select the device for cleaning. Selected the correct drive, then it is necessary to determine the method by which to begin cleaning (tips on command keys at the bottom of the screen).
There are several options, each of which provides a different level of guarantee recovery of irreversibility.
One has only to say that the method Gutmann wipe - a 35 data write cycles, that is a very long time. At the same time, experts (and the Gutman) recognize the redundancy of the number of cycles for modern drive models, so it will be enough and more simple methods such as DoD Short.
When discs and methods selected, press F10. This starts the cleaning procedure with an indication of the current phase, the recording speed, elapsed and remaining time until the process is complete.
This method does not work in the case of solid state drives and RAID-arrays.
Darik's Boot and Nuke