KR20080098164A - How to delete data from the hard disk - Google Patents

Abstract

The present invention relates to a hard disk used in a computer, a notebook, a server, etc. In particular, the hard disk to manage the hard disk, the data that requires security to be completely deleted and recovered so as not to leak, hard to remove unnecessary files on the hard disk efficiently Disc management and data deletion method. The present invention generates a random number when deleting information recorded on a hard disk, which is a non-volatile memory installed in a computer, a notebook computer, or the like, and deletes it by overwriting with another letter or number. Data can not be seen again, and the space used to clean the empty space is also used to clean the empty space, which improves the performance of the system and prevents the leakage of personal information or company information that the user does not want. Disk management and data deletion method.

Description

Hard Disk Management and Hard Disk Management {Method of data elimination and Hard disk Management}

1 is an overall processing flowchart of the hard disk management and data deletion method of the present invention.

2 is a screen example of software for processing hard disk management and data deletion of the present invention.

3 is a diagram illustrating items and menus for processing hard disk management and data deletion of the present invention;

4 is an operational flowchart of processing file and folder deletion of the present invention.

5 is an operational flowchart of processing unused area cleaning of the present invention.

<Description of Major Symbols in Drawing>

10: File 12: View

14: Hardware Information 16: Log File

30: delete 32: clean unused area

34: Job stopped 36: Disk cleaning

38: preferences

The present invention relates to a hard disk used in a computer, a notebook, a server, etc. In particular, the hard disk to manage the hard disk, the data that requires security to be completely deleted and recovered so as not to leak, hard to remove unnecessary files on the hard disk efficiently Disc management and data deletion method.

In general, a hard disk mounted on a terminal of a computer, a laptop, a server, etc. is a thin layer of magnetic material coated on the surface of an aluminum or plastic plate, and usually has a data recording surface of 5.25 inches. The size and shape are like records. Mechanical device that controls the location, read, write, save, etc. of a hard disk. Rotational speed is an important factor in determining the input / output speed of data.

In addition, the hard disk has a cluster (Cluster) by capacity to manage the overall files and folders. When a computer user deletes a file, the actual file is not deleted, but is removed from the cluster that manages the file, and only the path of the corresponding file is removed from the cluster and is hidden from the screen. It is stored on the hard disk as it is. Therefore, you can recover deleted files later using recovery software.

In order to completely destroy information stored in a device such as a hard disk as a semi-permanent memory device, a method of physically destroying the hard disk or completely deleting information stored by a strong magnetic field is used.

However, such a physical destruction method of the hard disk has a problem that the storage device cannot be used again.

In addition, when the computer user deletes the stored data, the user can recover the data using recovery software. Therefore, the user deletes the data using a separate deletion software to prevent leakage.

However, data can be recovered even if the data stored in the computer is deleted or formatted using such data deletion software. Therefore, if important personal data or confidential data of the company is leaked, problems may occur due to the leakage of data. . Therefore, individuals or companies who use computers need software to completely delete the deleted data.

The present invention is to solve the above problems, an object of the present invention is to generate random numbers or other characters, when deleting information recorded on a hard disk that is a non-volatile memory (non-volatile memory) mounted on a computer, laptop, etc. Since the data is deleted by overwriting, the original data cannot be seen again by using the recovery software. Also, when the space on the hard disk is cleaned, the overwrite is used to clean the empty space to improve the performance of the system. Provides hard disk management and data erasing methods to prevent the leakage of personal information or company information.

In addition, an object of the present invention is to enable hard disk management and data deletion at the same time according to the number of mounting of the hard disk, a non-volatile memory mounted on a computer, notebook, server, hard disk management and data deletion to reduce processing time In providing a method.

In addition, an object of the present invention is to provide a function for deleting files, folders, reverse area cleaning of a hard disk, and a hard disk cleaning function so that a computer user can safely delete data and securely organize unnecessary files on the hard disk. The present invention provides a method of hard disk management and data deletion to improve performance.

The method of the present invention for achieving the above object is to create a menu execution thread for processing the operation of the menu in the first step of selecting a hard disk drive to execute the menu, and when the number of the executed menu is within the number of concurrent tasks 2 processes of processing hard disk management or data erasing operation, and 3 processes of stopping the menu execution thread running on the hard disk drive when the menu is suspended during execution of the executed menu execution thread. Characterized in that.

In addition, the above-mentioned menu is characterized in that it includes deleting, unused area cleaning, and disk cleaning.

In addition, when the user selects the execution of the file deletion menu, the present invention creates and executes a deletion thread to create a temporary file in a write mode and generates a random number in the temporary file to generate a random number in the temporary file. 10 steps of overwriting with the user, 11 steps of overwriting the temporary file with random characters, 00, and FF if the user does not set the fast writing, and selects overwriting and deletes 12 steps of overwriting the temporary file so that the deletion is equal to the size of the file selected for deletion compared to the size of the file, randomly generating and changing a file name of the temporary file overwritten, and changing the size of the temporary file Is changed to 0, and the temporary file is deleted and a file deletion message is displayed on the screen to delete the temporary thread. It characterized in that it comprises a step of 13 exits.

In addition, step 13 may include, when the user selects to execute the folder delete menu, deletes all the files in the folder, and then deletes the folder and outputs a folder delete message.

In addition, when the user selects a hard disk drive and executes an unused area cleaning menu, a 20-step process of creating an unused area cleaning menu thread and creating a temporary file in a write mode is performed. 21 to generate a random number and to overwrite with a garbage value composed of random characters, and if the user does not set the fast write, overwrites the temporary file with random characters, 00, FF, and so on; The process of overwriting the temporary file so that the same amount of space on the hard disk drive selected for overwriting and cleaning the unused area is performed, and overwriting is performed for the same amount of free space on the hard disk drive. Delete the temporary file and output an empty area deletion complete message; In that it comprises a step of 23 ends the reverse cleaning menu thread features.

In addition, when the disk cleaning menu is executed, the disk cleaning thread is created and executed to format the selected hard disk drive, and generate a temporary file such as the total size of the formatted hard disk drive. And a 31 step of processing the disk cleaning by deleting the temporary file and executing 32 steps of overwriting in the order of fast writing or random characters, 00, FF, and 32 steps of terminating the disk cleaning thread. .

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted.

The present invention relates to the management and deletion of a hard disk as a non-volatile memory, and deletes the data of the computer hard disk in which the confidentiality of an individual or a company is stored. The present invention relates to a hard disk management and data deletion method that improves the performance of a computer and processes a complete data deletion by organizing unnecessary files by cleaning the free space of the disk.

1 is a flowchart of the overall processing of the hard disk management and data deletion method of the present invention.

Figure 1 shows an example of the overall operation flow chart of the present invention, the user executes the hard disk management and data deletion software in step S200.

In step S210, the user selects a folder on the hard disk to execute a desired menu.

At this time, the user can individually execute a desired menu for a plurality of hard disks installed in the computer.

In step S220, when the menu selected by the user is determined as a folder delete command, the number of jobs executed simultaneously is determined.

It is determined whether the number of jobs executed simultaneously in step S230 is smaller than the number of hard disks mounted in the computer. The present invention processes the hard disk management and data deletion menus at the same time as the number of individual hard disks mounted on the computer, and controls no more menus to be executed at the same time. Alternatively, the present invention may be provided by designating the number of tasks that can be executed simultaneously when executing software.

If the menu executed at the same time in step S240 is executed less than the set number, the process proceeds to step S250 to create and execute a thread (thread) corresponding to the delete menu executed by the user to perform the delete operation in step S250.

In step S260 terminates the deletion thread (thread).

On the other hand, if the menu selected by the user in step S220 described above corresponds to the stop command, the process proceeds to step S270, the user can select the operating hard disk drive to stop the working thread.

In addition, when the user requests to stop another thread (thread) running on another hard disk drive at the same time in step S280, the working thread running on the corresponding disk drive is stopped.

If the working thread is stopped at steps S270 and S280, the user returns to step S210 to execute the desired menu again.

In step S290, if the user chooses to stop all the hard disk management and data deletion software, the software of the present invention is completely terminated.

1 described above describes the overall operation of the hard disk management and data deletion software of the present invention. In FIG. 1, the processing of the delete 30 menu and the job stop 34 has been mainly described, but it operates in the manner mentioned above when executing menus such as the unused area cleaning 32 and the disk cleaning 36.

2 shows an example of a screen of software for processing hard disk management and data deletion of the present invention, and FIG. 3 shows items and menus for processing hard disk management and data deletion of the present invention.

Referring to FIGS. 2 and 3, the main screen of the present invention includes a user selectable file 10, view 12, hardware information 14, log file 16, and help 18. You can see it configured.

In addition, similar to the search function of Windows, there are two window screens 20 and 22, and the left window 20 displays a plurality of hard disks mounted on the computer, and the right window ( 22) shows a folder stored on the selected hard disk.

The file 10 item of FIG. 2 has the main functions of the present invention, and is deleted (30), unused area cleaning (32), job stoppage (34), disk cleaning (36), environment setting (38), and exit (40). ) There is a menu.

The Delete (10) menu of the File (10) item completely deletes a file or folder, and overwrites the characters, 00, FF, etc. generated by random number generation, and restores the file or folder again even after using recovery software. Provides the ability to recover a folder.

The clean unused area 32 menu of the file 10 item is cleaned by overwriting the remaining space other than the space occupied by the file or folder stored in the hard disk by generating a random number.

The Job Pause 34 menu of the File 10 item is selectively executed when a menu such as Delete 30, Unused Area Clean 32, Disk Clean 36, etc. must be terminated for another job while executing. To stop it. Deletion of files or folders that have been made before the operation stops is effective, and the remaining files or folders remain intact.

In this case, if the stop operation (34) menu is executed while the entire disk drive is being deleted, such as disk cleaning (36), the disk drive will be in an unformatted incomplete state. Can perform file I / O functions.

The Clean Disk (36) menu of the File (10) item generates a random number of the entire hard disk drive space in the same manner as the clean unused area (32) described above after formatting the entire selected hard disk drive. Clean it by writing.

The configuration 38 menu of the file 10 item is selected and set by the user, and can be designated by selecting the number of overwrites and selecting whether to execute the quick write operation.

When the user designates the number of times of overwriting a plurality of times, a random number is generated at the time of executing the above-described deletion (30), unused area cleaning (32), and disk cleaning (32) functions. This will completely delete the files and folders stored on the disk.

In addition, the fast write operation is to service the above-described deletion 30, unused area cleaning 32, and disk cleaning 32 functions more quickly, and random numbers are generated to quickly overwrite arbitrary character values.

The Exit 40 menu of the File 10 item terminates the hard disk management and data deletion software of the present invention.

Next, the items in the view 12 include menus such as a toolbar 42, a status bar 44, a split 46, a refresh 48, and the like.

The toolbar (42) menu of the View (12) item is a menu for selecting an icon to be mainly used by the user. A small icon is set on the main screen as shown in FIG. 1, and when the user presses the icon by using a mouse, The corresponding action is executed.

In addition, the status bar 44 menu of the view 12 item is located at the bottom of FIG. 1 to show the current state, and FIG. 1 shows that the user presses the <F1> key for help.

In addition, the Split 46 menu of the View 12 item relates to a bar 24 that divides the middle of two windows 20 and 22. When the user selects the Split 46 menu, the split bar menu ( This function is to change the position of 24) by selecting it with the mouse.

The hardware information (14) item shown in the main screen shows information such as the drive name, volume name, file system, total size, free space, serial number, etc. of the hard disk installed in the computer.

The log file 16 provides a start time, an end time, a date, a related message, and the like of the software of the present invention, and the user can designate a desired path and store the log file.

The help 18 section provides a description of the product registration of the software of the present invention, a description of the use of the software, and a description of problem solving.

4 is a detailed operational flowchart of processing file and folder deletion of the present invention.

First, in step S300 ~ S310, the user executes the hard disk management and data deletion program shown in Figure 1, selects a file and clicks delete. Select the Delete (30) menu of the file (10) item to execute or move the mouse over the file to be deleted and press the right button. This is the same as using software on Windows.

In step S320, the user checks whether the delete operation 30 is executed to prevent the user from incorrectly selecting the file deletion menu and deletes the important file. If the user selects cancel, the process proceeds to step S330 and the main screen is displayed again.

When the user selects execution of the file deletion menu in step S320 described above, a deletion thread is created and executed to first create a temporary file in a write mode.

In step S350, if the user sets the above-described fast writing in the menu of setting menu 38, the process proceeds to step S3602 to generate a random number in a temporary file generated by the random value of 64Kb at a time. Perform an overwrite.

On the other hand, if the user does not set the fast write in step S350 proceeds to step S370 and overwrites the generated temporary files in the order of random characters, 00, FF three times. At this time, 64Kb is executed in one overwriting.

Overwrite overwrites the selected file with random characters, 00, FF, and the contents of the file to be deleted are overwritten with garbage.

In step S380, the overwrite is executed and the deletion is compared with the size of the selected file.

For example, if the deleted file is 200Kb and the overwritten temporary file is 150Kb, the remaining 50Kb of free space is overwritten. Overwrite the temporary file so that it has the same size as the file you chose to delete.

In operation S390, the operation of operation S380 is repeatedly performed as much as the number of overwrites set in the configuration menu 38 in operation S390.

Randomly create and change the file name of the temporary file in steps S400 ~ S410, change the size of the file to 0, delete the temporary file in step S420, and delete the file in the main screen in step S430. Terminate the delete thread that was created and executed by printing.

The change of the temporary file name and size described above is to change the file name and the file size to enhance security.

As mentioned above. 3 of the present invention, when the user selects not only to delete a file but also to delete the entire folder, the file is changed to a character, 00, FF, etc., which randomly generates an overwrite for each file stored in the folder, and the file name is changed and the file is deleted. After changing the size, delete temporary files to delete all files in the folder. After deleting all the files in the folder, the corresponding empty folder is also overwritten to complete the deletion, and a 'Delete Folder' message is displayed.

On the other hand, if the job stop 34 menu is selected again while executing the above-described deletion or deletion menu of the file or folder, the operation in progress is stopped, and if the file or folder is completely deleted, it cannot be recovered. Advanced deletion is available.

The hard disk management and data deletion method of the present invention operates to meet international security standards.

5 is an operational flowchart of processing unused area cleaning of the present invention.

First, in step S500 ~ S510 the user executes the hard disk management and data deletion program of the present invention shown in Figure 1 to select one hard disk and click on the clean unused area 32 menu in the file (10) item do. Alternatively, select the hard disk and right click the mouse to execute the Unused Area Cleaning 32 menu.

In step S520, the user confirms whether or not the user correctly executed the unused area cleaning (32) menu. If the user selects cancel, the process proceeds to step S530 and the main screen is displayed again without executing the unused area cleaning (32) menu. Is displayed.

When the user selects execution of the unused area cleaning 32 menu in step S520 described above, an unused area thread is created and executed to first create a temporary file in a write mode.

In step S550, if the user sets the above-described fast writing in the configuration menu 38, proceed to step S560 to operate a random number function on the generated temporary file to overwrite the garbage value of arbitrary characters by 64 Kb at a time. Run

On the other hand, if the user does not set the fast write in the configuration menu (38) in step S550, the temporary file generated in step S570 is overwritten three times in the order of random characters, 00, FF.

To overwrite, insert randomly generated random characters into the buffer, and overwrite the remaining capacity of the hard disk by selecting the Unused Area Cleaning menu, and the unnecessary files in the remaining capacity of the hard disk are cleaned.

In this way, if the buffer is overwritten three times by the remaining capacity of the hard disk separately for 00 and FF, unnecessary files in the remaining capacity of the hard disk are cleaned.

In step S580, the above-described fast writing or overwriting is executed, and the remaining area of the selected hard disk is compared with the size of the temporary file.

For example, if the remaining capacity of the hard disk to be cleaned is 100000Kb and the size of the overwritten temporary file is 99000Kb, the remaining space of 1000Kb is overwritten again.

In other words, it overwrites the same amount of free space on the hard disk.

The process proceeds to step S590 and repeats steps S580 to S580 as many times as the number of overwrites set in the configuration menu 38. Repeated execution of the present invention is repeated to allow complete cleaning.

Delete the unnecessary files remaining in the free space by deleting the temporary file that overwrites the same size as the free space of the hard disk in step S600, and generates and executes the output of the 'blank area deletion complete' message in step S610. Terminate an unused realm thread.

In addition, when the job stop 34 menu is executed while executing the above-mentioned unused area cleaning 32 menu of the hard disk, cleaning of the unused area is stopped and cleaning of the unused area executed up to that time is effective.

In addition, when the disk cleaning 36 menu, which is one of the main functions of the present invention, is executed, a disk cleaning thread is created and executed to execute the hard disk drive format first, and corresponds to the unused area cleaning menu described in FIG. Delete the files so that they cannot be recovered completely by executing the set number of times for the entire area of the hard disk drive.

In addition, the hard disk management and data deletion programs of the present invention can be executed simultaneously as many as the number of hard disks mounted on the computer, the user can simultaneously delete, unused area cleaning, and disk cleaning functions when a plurality of hard disks are mounted It can be executed for each hard disk.

So far, the configuration and operation of the embodiment of the present invention have been described. The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims but also by the equivalents of the claims.

The present invention deletes data stored in a non-volatile memory such as a hard disk completely upon deletion and deletes the data stored in a nonvolatile memory such that the individual and company are stored in the computer safely.

In addition, since unnecessary files are removed by the unused area cleaning and disk cleaning functions, the speed of the computer is improved, and several menus can be executed at the same time as the number of mounted hard disks, thereby reducing the time and improving the work efficiency.

Claims (13)

Selecting a hard disk drive to execute a menu; Creating a menu execution thread for processing the menu operation when the number of executed menus is within the number of simultaneous operations, and performing hard disk management or data erasure operation; Hard disk management and data erasing method comprising the step of stopping the menu execution thread running in the hard disk drive during the execution of the menu execution thread running in progress of the menu execution thread. The method of claim 1, The menu includes file deletion, folder deletion, unused area cleaning, and disk cleaning. The method of claim 1, The above three steps, And when the menu execution threads are running on a plurality of hard disk drives, the user selecting the hard disk drive to disable the menu execution threads. When the user executes the file delete menu, a delete thread is created and executed to create a temporary file in a write mode, and if fast write is set, random numbers are generated in the temporary file to overwrite with a garbage value composed of random characters. 10 courses; If the user does not set the fast writing, step 11 of overwriting the temporary file in order of random characters, 00, and FF; A step 12 of executing the overwriting and overwriting the temporary file to be equal to the size of the file selected for deletion in comparison with the size of the file selected for deletion; The file name of the temporary file that has been overwritten is randomly generated and changed, and after changing the size of the temporary file to 0, the temporary file is deleted and the file deletion message is displayed on the screen to terminate the deletion thread. Hard disk management and data deletion method comprising the process. The method of claim 4, wherein The 12 process, Hard disk management and data erasing method comprising the step of repeatedly overwriting the 12 steps in the step 10 as the number of overwrites set by the user. The method of claim 4, wherein The above 12 steps, And if the user executes the delete menu, confirms whether or not the delete menu proceeds through a user interface screen and proceeds. The method of claim 4, wherein The 13 process, And when the user selects the execution of the folder deletion menu, deleting all the files in the folder, and then deleting the folder and outputting a folder deletion message. The method of claim 4, wherein And selecting the hard disk drive on which the delete menu is executed to execute the stop menu, wherein the operation of the delete thread is suspended. Step 20 of selecting a hard disk drive and executing an unused area cleaning menu to create an unused area cleaning menu thread to create a temporary file in a write mode; If the user sets the fast write, random numbers are generated in the temporary file to overwrite with a garbage value composed of random characters. If the user does not set the fast write, random characters are written to the temporary file, 00, FF. 21 steps of performing overwriting in order; Performing overwriting and overwriting the temporary file to equal the size of the remaining space of the hard disk drive selected to clean the unused area; And a step 23 of deleting the temporary file overwriting the same size as the free space of the hard disk drive, outputting a blank area deletion completion message, and terminating the unused area cleaning menu thread. How to manage disks and delete data. The method of claim 9, The 22 process, Hard disk management and data erasing method comprising the step of repeatedly overwriting the step 22 in the 20 step by the number of overwrite set by the user. The method of claim 9, And selecting the hard disk drive on which the unused area cleaning menu is executed to execute the stop menu, wherein the operation of the unused area cleaning menu thread can be stopped during the process. Executing a disk cleaning menu to generate and execute a disk cleaning thread to format a selected hard disk drive and generate a temporary file such as a size of the entire area of the formatted hard disk drive; Generating a random number in the temporary file to overwrite it with a garbage value, or performing a predetermined number of times of overwriting in random characters, 00, and FF, and deleting the temporary file to process the disk cleaning; And terminating the disk cleaning thread that has finished execution. The method of claim 12, And selecting the hard disk drive on which the disk cleaning menu is executed to execute the stop menu, wherein the operation of the disk cleaning thread is stopped.

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