Table of contents
introduction
In daily work, study and life, a very important thing is to develop the habit of backing up important data. This is not just to make myself feel at ease, but more to prevent accidents from happening. Sometimes some files are deleted by mistake or the U disk storing data is damaged. If there is a backup file at this time, many problems will be avoided. But no matter how tight the protection is, there will always be mistakes. At this time, we need to restore the data to get the lost files.
Bloggers often encounter the situation that the U disk data is damaged and needs to be repaired, so here is the way to describe their own data recovery. There are a lot of data recovery software currently available, but most of them only allow partial data recovery for free, and all data recovery needs to activate VIP or pay a certain fee. This blogger is going to recommend a free data recovery tool, and at the same time briefly introduce some basic principles of data recovery. The name of the software is R-Studio, and a download link is attached at the end of the article.
Principles of Data Recovery
The data is saved in the hard disk (or other storage media). When the system reads the file, it will read the relevant information of the file from the directory area DIR of the hard disk, such as the file name, file size, file modification date, and file location. (the cluster number of the data area DATA), and then the location of the data can be known based on this information, and then the data can be read. When the hard disk is recording a file, first record the file information: file name, file size, file modification date (not including the file location) to the DIR area, and then select a vacant space in the DATA area, put it in, and go to the DIR area by the way. The DIR area records the location of the file.
The way the operating system deletes files is very simple, just change the first character of the file in the DIR area to E5 (the conventional deletion method, if the data overwrite method is used, the data cannot be recovered), that is to say, the data of the file is not It is not overwritten, but the space occupied by the original file is set to be available, thus creating the possibility for recovery. Therefore, we can know that deleting a file is nothing more than erasing half of the corresponding recorded data location information, or marking you that the content has been deleted. (For example: a certain content in the book is on page 35, it erases the 3, and only type *** is on page X5, what we have to do is to open all the pages with 5 to find the data. FAT32 is like this Dry, NTFS is even simpler, just tell you that this lesson is invalid). But the real data still exists on the disk. Even if you tear up the entire directory (general formatting), we can definitely find it by manually flipping through it page by page. This type of deletion is often just an illusion. As long as the technology is appropriate, you can find the corresponding catalog page, or if you work hard, you can always find what you want. This is the technical core of the real realization of data recovery.
Data recovery methods and recommended tools
R-studio is a powerful data recovery software. It is famous for its fast scanning and high recovery success rate. It adopts unique data recovery technology and supports NTFS, ReFS, FAT/exFAT, Ext2FS/Ext3/Ext4, UFS, HFS Equal partition file system to restore data.
The specific steps to use the R-studio tool to restore the damaged U disk data are as follows:
1. Select the drive letter that needs to recover data and scan the data.
2. Select the scanning range, which can be customized.
3. If the disk is relatively large, it will take several hours to scan, depending on the number of files to be scanned.
4. After the scan is complete, click the Show Files button.
6. After the files are displayed, check the files that need to be restored, and select the target output folder to restore the files.
download link
Link: https://pan.baidu.com/s/19ci2q1ZbStj5k7kQTjQEaQ
Extraction code: k5n9