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This article introduces the relevant knowledge of "formatting is the meaning of deletion". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Formatting is not deleting. Formatting refers to the initialization of a disk or partition on a disk, which usually results in the removal of all files on the existing disk or partition; deletion refers to deleting files from the directory list of the system.

The operating environment of this tutorial: windows7 system, Dell G3 computer.

Formatting is an operation that initializes a disk or partition (partition) on a disk, which usually causes all files on the existing disk or partition to be erased. Formatting is usually divided into low-level format and high-level format. If not specified, formatting a hard disk usually refers to advanced formatting, while formatting a floppy disk usually includes both.

It is to clear the data on the hard disk, generate the boot area information, initialize the FAT table, mark the logical bad path, and so on. Generally speaking, when we reinstall the system, we use high-level formatting, which is to initialize the disk so that we can record data on the disk step by step.

Delete: refers to the deletion of files from the directory list of the system, but in many cases, deleted files can be recovered with tools or the "Recycle Bin" provided with Windows. For insurance, users had better develop a floppy disk backup of their input text or other files, just in case. Each file stored on the hard disk can be divided into two parts: the file header and the data area in which the data is stored. The file header is used to record the file name, file attribute, occupation cluster number and other information. The file header is saved in a cluster and mapped in the FAT table (file allocation table). The real data is stored in the data area. The deletion that is usually done is actually to modify the first two codes of the file header, which is mapped in the FAT table, which marks the deletion of the file, and clears the entry of the cluster number occupied by the file in the FAT table, indicating the release of space, which is the reason for the increase of hard disk space after the file is usually deleted.

According to the principle of file deletion, the only way to delete data completely is to completely overwrite the data area where the file is deleted. Most of the complete deletion tools use this principle: write useless data to the data area of the deleted file repeatedly, and overwrite it many times, so as to achieve the purpose of deleting the file completely.

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