CN100437504C - Hard disk data backup system and method - Google Patents

Abstract

A hard disk data backup system and method are used for backing up hard disk data of a computer system into a mirror image file. The invention reads the file system of the hard disk data to the memory of the computer system before backup, automatically checks the logic error existing in the file system of the hard disk data, correspondingly repairs the detected logic error of the file system in the memory, and finally backs up the hard disk data containing the correct file system to the mirror image file. The hard disk data backup system and the hard disk data backup method can detect and repair the logic errors possibly existing in the file system in real time in the backup process, not only ensure the normal operation of the backup operation, but also simplify the steps and the process of the backup operation and reduce the consumption of system resources in the backup process.

Description

Hard disk data backup system and method

technical field

The invention relates to a computer data information security technology, in particular to a system and method for realizing computer system data backup.

Background technique

In recent years, due to its convenient and effective features, computers are often used to store and process some important affairs, and they are playing an increasingly important role in people's daily life and work. A major problem faced by many computer users today is the loss of computer data due to damage to the operating system or hard drive. It is very important to enhance the protection of user data. Therefore, effective hard disk data backup and recovery has also become the focus of attention of computer users.

At present, there are many backup methods for protecting computer operating system information, but the hard disk data backup method in the known technology usually requires that the file system on the hard disk is correct when backing up the file system, that is, the file system should not contain Any logic errors etc. Otherwise, during the backup process, the backup process will exit due to a logical error in the file system. For example, the logical error of the file system may be that the file length of a certain file in the attribute record is smaller than the actual file length, so the backup method of the known technology will cause a data buffer when allocating memory according to the file length in the attribute to store the actual file data. The overflow, which in turn leads to the abnormal exit of the backup process.

When the file system contains logical errors, the general measure is to use the detection and repair tools of the corresponding file system to correct the logical errors. Only after all the logical errors are eliminated can normal hard disk data backup be performed.

Therefore, the backup method of the known technology still has many defects, especially when it is not clear in advance that there is a logical error in the file system backed up, it is necessary to call a special detection and repair tool to repair it in addition. Usually the backup process is the steps of "backup → error → detection and repair → backup again", so the backup operation is not only tedious and complicated, but also increases the consumption of system resources. Also, a backup process that goes wrong instead of exiting normally can cause accidental corruption of hard drive data.

Contents of the invention

In order to solve the problems and defects in the above-mentioned known technologies, the purpose of the present invention is to provide a hard disk data backup system and method, which can automatically detect and repair file system errors during the backup process, and solve the shortcomings and limitations of the known technologies.

The hard disk data backup system provided by the present invention is used for backing up the hard disk data of the computer system into a mirror image file. This system includes a detection module, a repair module and a backup module; here, the detection module is used for reading before backup Take the file system of the hard disk data to the memory of the computer system to check the logic errors in the file system of the hard disk data; the repair module is used to repair the logic errors of the file system in the memory to obtain a correct file system; the backup module is It is used to back up the hard disk data containing the correct file system to the image file.

According to the hard disk data backup system of the present invention, the detection module further includes a raw data detection module and a file directory detection module. The original data detection module is used to compare the actual information of the original data of the file system with the attribute information of the original data to detect whether there is a logic error in the original data; the file directory detection module is used to compare the actual information and Attribute information of files or directories to detect logical errors in files or directories. In addition, according to the hard disk data backup system of the present invention having the above-mentioned features, the repair module further includes: an original data repair module, which is used to restore the original data in the memory when the actual information of the original data in the file system is inconsistent with the attribute information of the original data. Correcting the attribute information of the original data; and the file directory repair module, used for correcting the attribute information of the file or directory in memory when the actual information of the file or directory in the file system is inconsistent with the attribute information of the file or directory.

In addition, the present invention also provides a hard disk data backup method, comprising the following steps:

Read the file system of the hard disk data into the memory of the computer system;

Detect logical errors in the file system in memory;

Fix file system logic errors in memory; and

Back up the hard disk data containing the repaired file system to the image file.

According to the hard disk data backup method of the present invention, the steps of detecting logical errors in the file system in the memory and repairing the logical errors of the file system in the memory further include the following steps: comparing the actual data of the original data of the file system information and its attribute information; determine whether the actual information of the original data is consistent with its attribute information; and if not, correct the attribute data of the original data to be consistent with its actual data. Among them, in the step of judging whether the actual information of the original data is consistent with its attribute information, if they are consistent, the following steps are further included: obtaining the partition size and starting position of the original data, and matching the corresponding record information in the original data Comparison; calculate the bitmap size and starting position of the original data, and compare it with the corresponding record information in the original data; calculate the starting position of the root node of the original data, and compare it with the corresponding record information in the original data; And calculate other attribute information of the original data, and compare with the corresponding record information in the original data.

According to the hard disk data backup method of the present invention, the steps of detecting logical errors in the file system in the memory and repairing the logical errors of the file system in the memory further include the following steps: comparing the files or directories of the file system The actual information of the file or directory and its attribute information; determine whether the actual information of the file or directory is consistent with its attribute information; and if not, correct the attribute data of the file or directory to be consistent with its actual data. Wherein the step of comparing the actual information of the file or directory of the file system and its attribute information further includes the following steps: judging the file type of the file system; if the file type is an ordinary file, comparing the actual length of the ordinary file and its attribute length; And if the file type is a directory file, compare the actual information of the number of files and subdirectories of the directory file with the directory attribute information. The present invention inserts the detection and repair mechanism of the logic error of the file system in the process of backup, which can detect and repair the error in the process of backup, and realize it step by step along with the process of backup, avoiding possible errors due to the backup process. The backup is interrupted due to an error, thereby simplifying the operation steps and process of the known backup technology, reducing the impact on the backup process and the consumption of system resources.

In addition, the invention detects and repairs the logical errors of the file system in the computer memory, thereby avoiding accidental destruction of data on the hard disk.

Description of drawings

Fig. 1 is the system block diagram of hard disk data backup system of the present invention;

Fig. 2 is the flow chart of steps of the hard disk data backup method of the present invention;

Fig. 3 and Fig. 4 are the detection, restoration and backup step flowchart of the original data of the file system;

Fig. 5 is a flow chart of the file/directory backup steps of the file system; and

FIG. 6 and FIG. 7 are flow charts of detecting and repairing steps of files/directories of the file system.

Among them, reference signs:

10Computer hard disk 20Data backup system

21 detection module 211 raw data detection module

212 File directory detection module 22 Repair module

221 Original data repair module 222 File directory repair module

23 backup module 231 original data backup module

232 file directory backup module 30 mirror file

Detailed ways

The preferred embodiment is described in detail as follows in conjunction with the accompanying drawings.

Please refer to FIG. 1 , which shows a system block diagram of the hard disk data backup system of the present invention, including a computer hard disk 10, a data backup system 20 and an image file 30, so as to back up various data contained in the computer hard disk 10 to the image. File 30. As shown in the figure, the data backup system 20 includes a detection module 21 , a repair module 22 and a backup module 23 . The detection module 21 includes an original data detection module 211 and a file directory detection module 212, the repair module 22 includes an original data recovery module 221 and a file directory recovery module 222, and the backup module 23 includes an original data backup module 231 and a file directory backup module 232.

Before backing up the operating system of the computer hard disk 10 or various data to the image file 30, first read the corresponding file system on the computer hard disk 10 into the computer system memory, and pass through the detection module 21 of the present invention, that is, the original data therein The detection module 211 and the file directory detection module 212 detect the file system on the computer hard disk 10 in the internal memory to determine whether there is a logic error in the file system. When there is a logic error, then call the repair module 22 of the present invention, that is, the original data repair module 221 and the file directory repair module 222 correct the corresponding logic error in the memory, so as to ensure that the backup process of the file system is carried out normally. The backup module 23 is used to back up the hard disk data containing the correct file system to the image file 30, so that when the computer system fails and the data is lost, the data can be recovered through corresponding recovery operations.

Usually, the file system includes original data, directories, and file data. The original data refers to the data that describes the structure of the file system, such as the size of the partition, the number of sectors for each data block, etc.; in addition, the file system also includes directories and corresponding files. Archive data. Therefore, when backing up the file system, it is necessary to back up the original data, directories, and archive data. But the file system will cause logical errors due to sudden power failure of the computer system and other reasons: for example, a certain file c:\windows\aa.bin is suddenly interrupted during the writing operation, the actual file length is longer than that recorded in the file properties At the same time, the operation of creating a file in the c:\windows directory is still in progress, and a file named bb.bin is created, but due to the sudden interruption of the operation, the file and sub- The number of directories is incremented by 1.

The corresponding functions of the original data detection module 211, the original data restoration module 221, the file directory detection module 212, the file directory restoration module 222, the original data backup module 231 and the file directory backup module 232 will be described in detail below.

It can be seen from the above that the backup module 23 includes the original data backup module 231 and the file directory backup module 232 . The original data backup module 231 obtains the location and size of the specified partition according to the backup file system, and obtains the type of the file system according to the data in the specified location of the partition, and then obtains the location and size of the original data. After reading the original data to the computer memory, the original data backup module 231 first calls the original data detection module 211 to detect the original data in the memory, and the original data detection module 211 according to the obtained actual original data information, such as partition size and initial Position, the size and starting position of the bitmap, the starting position of the root node and other attribute information, etc., are compared with the corresponding attribute information recorded in it to detect whether there is a logic error in the original data. If not, call the original data repair module 221 to correct the attribute information recorded in the original data, so as to keep consistent with the actually obtained or calculated information. Finally, the original data backup module 231 can back up the corrected original data to the image file 30 .

During the backup process, the file directory backup module 232 obtains the location of the root directory according to the superblock information of the file system, and uses this as a starting point to search the entire file system, and backs up each file and directory found during the backup process. . When backing up files and directories, the file directory backup module 232 first extracts the data and directory files in the directory to the computer memory, and then calls the file directory detection module 212 to compare the actual obtained file or directory information and records in the file or directory attributes. The corresponding information is compared to detect whether there is any inconsistency. If not, then the archive directory repair module 222 corrects the attribute information of the archive or directory to be consistent with the actual information, so as to eliminate the logic error existing therein. At this time, the file directory backup module 232 is used for backing up the modified file or directory information to the image file 30 . Of course, the backup module 23 can also back up other types of data or systems in the computer hard disk except the file system to the image file 30 .

During the backup process, the hard disk data backup system of the present invention will firstly detect the file system on the computer hard disk 10 through the original data detection module 211 and the file directory detection module 212 . For directories and files without logical errors, the backup module 23 will be used to back up the data of the directories and files to the mirror file 30 after detection. For the embodiments of logic errors caused by reasons such as the sudden power failure of the above-mentioned computer system, when backing up to the windows directory, for example, the actual file and subdirectory number are 2649, and what is recorded in the directory attribute of windows is 2648 (this is due to bb After the .bin file is created, it is caused by a sudden power failure before it is recorded in the windows directory properties). Before backing up the windows directory, first use the file directory detection module 212 to perform integrity detection on the windows directory, and then find the above logic error. Therefore, the logic error is corrected through the file directory repair module 222, that is, after the record in the windows directory attribute is modified to 2649, the data of the windows directory is backed up through the backup module 23.

Please refer to FIG. 2 below, which is a flow chart of the steps of the hard disk data backup method of the present invention. As shown in the figure, the hard disk data backup method of the present invention comprises the following steps:

Step S201, first read the file system of the hard disk data into the memory of the computer system;

Step S202, then detect whether there is a logical error in the file system in the memory;

Step S203, if there is a logic error, it is repaired;

Step S204, finally backing up the hard disk data containing the repaired file system to the image file.

Now, the steps of detecting, repairing and backing up the file system will be described in detail with reference to FIG. 3 , FIG. 4 , FIG. 5 , FIG. 6 and FIG. 7 .

Please refer to FIG. 3 and FIG. 4 , which are flow charts of steps for detecting, restoring and backing up the original data of the file system. As shown in Figure 3, the following steps are included:

Step S301, first obtain the location and size of the specified partition;

Step S302, obtaining the type of the file system according to the data at the designated location of the partition;

Step S303, then obtain the location and size of the original data according to the type of the file system;

Step S304, read the original data into the computer memory;

Step S305, obtaining original data information from computer memory;

Step S306, so that the actual information about the partition size and starting position of the original data can be obtained, and compared with the recorded corresponding original data attribute information;

Step S207, further judging whether the two are consistent;

Step S308, if inconsistent, it means that there is a logical error, then proceed to step S308, and correct the record information in the original data to be consistent with the obtained information;

Step S309, otherwise, it means that the partition size and starting position are correct, then calculate the bitmap size and starting position information in the original data, and compare with the attribute information of the corresponding record in the original data. Here, the symbol A represents the subsequent steps of the detection, restoration and backup steps of the original data.

In Figure 4, following the above steps, including:

Step S310, judging whether the size and starting position of the bitmap are consistent with the recorded information;

Step S311, if not consistent, correct the corresponding information recorded in the original data in the memory to be consistent with the calculated information;

Step S312, otherwise, then calculate the starting position of the root node, and compare it with the information of the corresponding record of the original data;

Step S313, then judge whether the two are consistent;

Step S314, if not consistent, correct the corresponding information recorded in the original data in the memory to be consistent with the calculated information;

Step S315, otherwise, calculate other attribute information in the original data, and compare it with the corresponding record information;

Step S316, to determine whether the above information is consistent;

Step S317, if not consistent, proceed to step S317 for correction in the memory to conform to the calculated actual information;

Step S318, otherwise, it means that there is no logical error in the backed up original data, then directly proceed to step S318, and back up the original data in the internal memory to the image file. For the original data with logical errors, it is backed up to the mirror image file after corresponding corrections in steps S308, S311, S314 and S317.

Figure 5 is a flow chart of the file/directory backup steps of the file system. During the backup process, the entire file system will be read gradually starting from the root directory, and the corresponding files and directories will be backed up. As shown in the figure, the following steps are included:

Step S501, first read the super block of the file system to obtain the location of the root directory;

Step S502, then extract the data and directory files in the root directory to the computer memory;

Step S503, and detect and repair the logical errors of the files and directories in the internal memory;

Step S504, then, back up the repaired correct file and directory to the image file;

Step S505, after performing the above operations on the root directory, enumerate each subdirectory under this directory;

Step S506, and judge whether there is a subdirectory under this directory, if there is no subdirectory, then end; otherwise, go to step S502, perform the operation from step S502 to step S505 for each subdirectory, until all file system directories are searched.

The specific detection and repair steps of files or directories in the file system will be described in detail below with reference to FIGS. 6 to 7 . FIG. 6 and FIG. 7 are flowcharts of the detection and repair steps of files/directories in the file system.

As shown in Figure 6, the following steps are included:

Step S601, first judge the file type to distinguish between ordinary files and directory files;

Step S602, for the directory file, then detect the number of files and subdirectories it actually contains;

Step S603, and compare the above-mentioned actual quantity with the quantity recorded in the directory attribute;

Step S604, judging whether the two are consistent;

Step S605, if inconsistent, correct the number of directory attributes in the memory to make it consistent with the actual number;

Otherwise, it means that there is no logic error, then end.

If it is an ordinary file, then go to step S606, where symbol B represents subsequent steps from step 406, including:

Step S606, for ordinary files, the actual length of the file is obtained, and compared with the file attribute length;

Step S607, judging whether the two are consistent;

Step S608, if inconsistent, correct the file length recorded in the file attribute in the memory to be consistent with the actual length;

Otherwise end.

Through this "detection→repair→backup" method, the system backed up to the mirror file no longer contains any logic errors, ensuring the correctness and integrity of the data in the mirror file, and the backup process will no longer be caused by the file system. exited unexpectedly due to a logic error.

Certainly, the present invention also can have other various embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these Corresponding changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (8)

1. hard disc data backup system in hard disc data backup to the mirror image archives with a computer system, is characterized in that this system includes:

One detection module, in order to the archives economy that before backup, reads this hard disc data to the internal memory of this computer system, with the logic error that exists in the archives economy of checking this hard disc data;

One repairs module, is used to repair in this internal memory the logic error of this archives economy, to obtain a correct archives economy; And

One backup module, in order to the hard disc data backup that will comprise this correct archives economy to these mirror image archives.

2. hard disc data backup system according to claim 1 is characterized in that, this detection module more includes:

Whether one former data detection module in order to the actual information of the former data of comparing this archives economy and the attribute information of this former data, exists logic error with these former data of detection; And

One archives catalog detection module, whether archives or the actual information of catalogue and the attribute information of this archives or catalogue in order to compare this archives economy exist logic error to detect these archives or catalogue.

3. hard disc data backup system according to claim 1 is characterized in that, this reparation module includes:

One former data repair module, in order to when the actual information of the former data of this archives economy is inconsistent with the attribute information of this former data, the attribute information of these former data of correction in this internal memory; And

One archives catalog is repaired module, in order to when the actual information of the archives of this archives economy or catalogue is inconsistent with the attribute information of this archives or catalogue, and the attribute information of these archives of correction or catalogue in this internal memory.

4. hard disk data backup method, in hard disc data backup to the mirror image archives with a computer system, this method includes the following step:

Step 41, the archives economy that reads this hard disc data is to the internal memory of this computer system;

Step 42 detects the logic error that exists in this archives economy in this internal memory;

Step 43, the logic error of in this internal memory, repairing this archives economy; And

Step 44, backup comprise the hard disc data of this archives economy after the reparation to these mirror image archives.

5. hard disk data backup method according to claim 4 is characterized in that, step 42 more includes the following step with step 43:

Step 51 is compared actual information and its attribute information of the former data of this archives economy;

Step 52 judges whether the actual information of these former data is consistent with its attribute information; And

Step 53 as if inconsistent, is then revised the attribute data data consistent actual with it of these former data.

6. hard disk data backup method according to claim 4 is characterized in that, step 42 more includes the following step with step 43:

Step 61 is compared the archives of this archives economy or actual information and its attribute information of catalogue;

Step 62 judges whether the actual information of these archives or catalogue is consistent with its attribute information; And

Step 63 as if inconsistent, is then revised the attribute data data consistent actual with it of these archives or catalogue.

7. whether consistent hard disk data backup method according to claim 5 is characterized in that, in this actual information of judging these former data and its attribute information step, if when consistent, more include the following step:

Step 71 is obtained the partition size and the reference position of these former data, and with these former data in corresponding recorded information comparison;

Step 72 is calculated the bitmap size and the reference position of these former data, and with these former data in corresponding recorded information comparison;

Step 73 is calculated the reference position of the root node of these former data, and with these former data in corresponding recorded information comparison; And

Step 74 is calculated other attribute informations of this former data, and with these former data in corresponding recorded information comparison.

8. hard disk data backup method according to claim 6 is characterized in that, this is compared the archives of this archives economy or the actual information of catalogue and the step of its attribute information and more includes the following step:

Step 81 is judged the file type of this archives economy;

Step 82 if this file type is common archives, is then compared physical length and its attribute length of these common archives; And

Step 83 if this file type is a directory file, is then compared actual information and its directory attribute information of the archives and the sub-directory number of this directory file.

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