How does file recovery software work?

Software on disk. After you delete it. Windows just removed the tag (file name).

And the files themselves are still stored on the hard drive. At this time, the file name can be recovered with recovery software. Or rather.

Link the files found on the hard drive to a file name. You can use this file again.

It is to recover the data that you cut off. But don't put anything in it until you recover.

Actually, it's like this.,I don't want to play.,But in order to let you know better.,Or say it in your own language.,The hard disk is divided into a lot of clusters.,I believe you all know.,Those clusters are used to hold files.,I believe you also understand.,Those clusters we're likened to watching a movie table (image point),Then you sit down.,It's equivalent to a file being saved.,And deleting a file.,That is, you left from that seat.,But does that table mean it's not yours?,That's not necessarily.,Because you may go to the toilet.。 So if you just leave for a while, when you come back, that position is still yours, that is, the principle of file recovery, and when you leave for a long time, or when you leave someone else sits down, that position is no longer yours, that's why file recovery should be fast, and you can't write new files By the way, this movie is in ancient times to occupy a seat without money If you ask for money, how long you go is your ethack

Probably it can be said that our hard disk has a lot of basic physical areas, the file is to use the system control head to record the electromagnetic signal on the basic area of the disk (yes, it is the principle of tape), and then make a mark here to show that there are useful files recorded here, the system will be based on this mark in the content, on the contrary, the system without a mark will automatically skip it to improve efficiency, you say that the file is lost and deleted by mistake, ......And so on, because the tag of the base area is missing, the system can't find the marker and can't read it, but no matter whether it is deleted or otherwise, the system only deletes the marker, and the content on the base area can be directly overwritten without having to be re-erased. The principle of file recovery software is to re-mark the base area so that the system can read the contents (hehe, that's brief enough).

To put it simply: deleting a file is not to erase the data on the hard disk, but to add a mark in front of the file directly in the partition table, which means that it has been deleted (otherwise the deletion will be a long process), and when a new file is written in the future, the system will overwrite the file with the deletion mark.

If it is not overwritten by the new file, then the original file is in good place, and the recovery tool can recover the file by removing the mark.

Hello! The computer is a binary language, the composition of the data is composed of 0 and 1, the deletion of files in the Windows system will generally enter the ** station, in fact, it is marked to delete, the file is not displayed in the system, but it is real, it can be recovered directly in the ** station, if the ** station is emptied, then it is marked in the system that the disk occupied by the file can be rewritten, and the real file is not deleted, that is, these 0 and 1 are also real, and only the new file will be lost when the sector is covered, Some data recovery software simply scans the sectors, finds those files that have not been overwritten, and then re-marks them as available.

BestRecoveryForWindows data recovery software uses efficient data structure and analysis algorithms to read out the original sector data from the bottom of the disk, and quickly and accurately reconstruct the lost or damaged directories and files in memory.

Data recovery software: data recovery and data recovery under software and hardware failures.

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How big is the hard drive, if it's not too big, I'll help you get it. The success rate is definitely better than you think. You'd better stop working with that disk.

Hi Format Data Recovery Master is a powerful, simple interface, simple operation and annoying data recovery software. It supports the recovery of hard disk files deleted by mistake, disk formatted by mistake, memory card data deleted by mistake, files accidentally emptied by **site, and hard disk files after the hard disk partition disappeared.

First of all, let's explain the two major factors that affect the success rate of data recovery, data overwriting and file fragmentation. Data overwriting refers to the overwriting of data after deletion and later when other data occupies part or all of its original storage space. Once the data is overwritten, the data cannot be recovered, remember!

The lower the data coverage, the greater the recovery success rate, and the same is true anyway. File fragmentation, when the data on the hard disk is read repeatedly for a long time, the cluster of saved files may become no longer continuous, which forms file fragments, too many file fragments, which will affect the speed of the system to read data, thereby reducing system performance, and organizing file fragments is to keep the fragments of the same file fragments as continuous as possible. If the file fragments are not continuous before the file is deleted, the file may not be restored or can only be partially restored after deletion.

Specific precautions:

1. After the data is lost, it is strictly forbidden to stare at the partition that needs to be recovered, and the new files can easily overwrite and destroy the original lost data. 2. Don't format the partition again, don't repartition the hard disk again, don't do dskchk disk check, these operations will write new data to the disk, which is easy to cause secondary data destruction. 3. Don't restore the data directly to the source disk, restore it directly to the source disk, it will destroy the files that have not been recovered.

4. It is recommended to restore to another hard disk or mobile hard disk or U disk, safety first. For recovery after repartitioning (including ghost splitting into several areas, resizing partitions, and merging partitions), you need to prepare another hard disk to store data, and do not restore it directly to the source hard disk. 5. If the drive letter cannot be opened, it will prompt that it is not formatted or has become a RAW type partition, and it must not be opened, because formatting will damage the directory file and affect the recovery effect.

6. After the files in the system partition are deleted, it is generally recommended to shut down and remove the hard disk as a way to recover from the disk to other computers, because during the boot operation, the operating system will keep writing things to the system C disk, which is easy to overwrite and destroy the data. 7. Some data recovery software, such as lost data recovery software, can accurately find the lost files through the preview function and judge whether the files can be recovered. 8. There are also some data recovery software that can judge the data coverage of files by the degree of data coverage, but this error rate is slightly larger.

9. There are also some single-format recovery software, such as super excel recovery software, which can specifically recover excel** files, this kind of software has the function of reorganizing file fragments, but can only recover files in xls and xls extended file formats, and other files cannot be recovered.