JPH03294942A - File backup system and information copying system - Google Patents

Abstract

PURPOSE:To execute the backup copy of an information file with only the minimum information damage by constituting the system so that all the information files except damaged data can be copied automatically from a damaged information file medium to a new medium. CONSTITUTION:The system for executing a file backup system of a hard disk is constituted by connecting a floppy disk 206, a keyboard 208, a display 209, and a built-in hard disk 101 to a CPU 207, and also, connecting a new hard disk 102. In such a state, in the case of copying a damaged file, other data than the damaged data part are copied simultaneously in large quantities, and also, only the damaged data part is replaced with readable dummy data. In such a way, such a user data operating system as all the files become unrecoverable by partial file damage can be restored safely, exactly and quickly on the copy file as more similar information.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a file backup method for a recording device having a storage medium of a computer system. The present invention relates to an effective file backup method that can be used to clearly understand and make the most of other information files, and an information copying method that is suitable for carrying out the method.

[Prior Art] Conventionally, when a failure occurs in a recording device with a storage medium in a computer system and the information stored in the recording device is damaged, the damaged data may be part of the user data. However, if the corrupted data is part of the operating system, the operating system may not be able to be restarted. .

As a conventional technique for dealing with the above-mentioned situation in which the operating system cannot be restarted due to a failure of the recording device, the technique described in, for example, Japanese Patent Laid-Open No. 56-24654 is known.

This conventional technique involves duplicating files between a plurality of terminals.

However, in a standalone computer system, if a failure occurs in a storage device with a storage medium and the stored data is damaged, in order to recover the storage device with a storage medium, a new storage medium must be installed. Prepare a recording device with the failed storage medium, replace it with the storage device with the faulty storage medium, and perform the operating system setup for the recording device with the new storage medium. or re-enter user data. Moreover, this process took a huge amount of time and was very difficult to completely recover the files.

[Problem to be solved by the invention] With the information file restoration method using manual intervention as in the prior art described above, it is extremely difficult to create the information file in the same environment as before destruction or as the same user data. Therefore, even if it were possible to create the same environment and the same user data,
This method has the problem of requiring a large amount of work.

The purpose of the present invention is to solve the problems of the prior art described above,
The same storage capacity as the damaged information file medium, and
By connecting or setting a recording device equipped with a new storage medium with the same interface, all information files other than the damaged data can be automatically transferred from the damaged information file medium to the new medium in a short time. The object of the present invention is to provide a file backup method that enables accurate copying, and also to provide an information copying method for this purpose.

[Means for Solving the Problems] According to the present invention, the object is to read data read/write access in copying when a recording device having a storage medium is damaged, by reading the maximum readable file size at one time. This is achieved by writing to a recording device with a new storage medium, and if there is a read access error, performing a minimum unit read access and writing to a recording device with a new storage medium. .

Further, it is an object of the present invention to read/write the information file when a minimum unit read access error occurs.
This is accomplished by changing the information file to a new information file using write-accessible dummy data and writing it to a recording device with a new storage medium.

Furthermore, it is an object of the present invention to set the device address of the recording device having the storage medium when writing to the new medium as described above.
By using a free device address other than the address allocated to the device, you can prevent file corruption due to external intervention from other devices, and prevent damage to user information files, user data, and the operating system due to operational errors. This is achieved by preventing damage.

[Operation] The normal information file, that is, the data other than the damaged file in the copy source information file read from the failed recording device to the read buffer, is written as is to the new medium. This allows files to be copied in a short time.

In addition, access to the media for corrupted files is performed in minimum units, and dummy disks corresponding to corrupted files are
This dummy data is written to the new medium. This makes it possible to maximize file recovery from a recording device with a damaged storage medium.

The data written on the new medium is read again and a conveyor check is performed to confirm whether the information file copying process was performed correctly.

[Embodiment] Hereinafter, an embodiment of the file backup method according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram for explaining copying of information files according to an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of an embodiment of a system that executes the method according to the present invention, and FIG. Figure 4 is a diagram explaining the address setting for the recording device, Figure 4 is a diagram explaining the data mask during copy processing, Figure 5 is
The figure is a flowchart explaining the processing procedure. In Figures 1 to 3, 101.102 is a hard disk,
103 is a damaged file, 104 is a new information file,
105 is dummy data, 206 is a floppy disk,
207 is a CPU, 208 is a keyboard, and 209 is a display.

In FIG. 1, a hard disk 101 is a recording device with a damaged information file, and a damaged file 103 is a damaged portion of the information file within the hard disk 101. On the other hand, the hard disk 102 is a new recording device for file backup, and files in the hard disk 101, which is the aforementioned damaged recording device, are copied.

During this copying, if the information file of the corrupted file 103 is read accessed, an unreadable error is reported, so dummy data (readable and writable data) 105 is created in place of the corrupted file 103, and this dummy data is replaced by a new one. The information file 104 is written to the hard disk 102, which is a new recording device. The amount of information file of this new information file 104 is the minimum unit of soft access.

The system for executing the hard disk file backup method according to the present invention is as shown in FIG.
207, floppy disk 206, keyboard 20
8, a display 209 and an internal hard disk 101 are connected, and a new hard disk 1 is added.
02 are connected.

In the system of this embodiment of the present invention, only one drive device is provided for driving the storage medium of the floppy disk 206, and this drive device allows
The system program for file backup installed in the floppy disk 206 is run by the CPU 207.
loaded into. Note that this system program is independent of the operating system.

The display 209 displays when a system program for file backup is started. In addition, a keyboard 20 connected to the CPU 207
8 is for inputting various documents and a new hard disk 10
It is used to input a command to perform copy processing for 2.

The illustrated system is provided with a user guidance function, particularly for copy processing. Furthermore, the contents of the keys pressed on the keyboard 208 are displayed on the display 209. The display 209 is also used to display an error when an error occurs during file backup processing.

When performing file backup according to the present invention, the hard disk 102 is connected to the CPU 207, files stored in the failed built-in hard disk 101 are copied, and then files stored in the failed built-in hard disk 101 are copied.
used as.

Next, in the system described above, the hard disk 10
A method of setting the device address when copying files stored in the hard disk drive 1o2 to the hard disk drive 1o2 connected for backup will be explained with reference to FIG.

When connecting a newly connected external file backup side hard disk 102 to the CPU 207 and backing up a file on the hard disk 101 whose information file is damaged, by performing a file copy from the hard disk 101 to the hard disk 102,
A file backup is performed.

At this time, the normally used device address 314 and the free area device address 313 are used as the interface address, which is the device address for connecting the hard disks 101 and 102. Free area device addresses 313 are typically exposed to the operating system and are not device addresses configured by the operating system, and have no overlap with commonly used interface addresses 314.

In Figure 3, the device address “1” is surrounded by a double frame.
~"7" is normally a device address that can be used by the operating system, and various input/output devices (not shown) are accommodated therein. The address "0" shown as the device address 313 is an address that is stored in the floppy disk 206 described with reference to FIG. 2 and can be accessed only from a special system such as a file backup system.

Therefore, by fixing this free area device address 313 as a dedicated address for the backup hard disk 102, write access protection can be set, and file destruction at the user site can be prevented.

Next, with reference to FIG. 4, a method of data access when performing copy processing will be explained.

First, read the maximum amount of data file that can be read from the failed hard disk, and when this data file is successfully read, read this data file 419 shown as ■～■ into the read buffer, and then back up the file. The data is written as is as a copy file 422 in the hard disk of the computer.

However, in the case of the data file 420, there is a read error information file 421 inside it, so as in the case of the data file 419 described above, all the data files are transferred to the hard disk for file backup at once.
Unable to copy to 02. Therefore, the data file 420 is divided into small files 420■, 4
2o■.

Read access is performed in the order of 420■, 421, and 420A, and the files are sequentially written to the hard disk 102 for file backup as a file 422. At this time, a read error occurs in the file 421, so the data of this file is changed to a file 423 of readable dummy data and written as a copy file 422.

File reading during the aforementioned copy operation is performed on the maximum amount that can be read, for example, multiple tracks at the beginning, and if a read error occurs during this reading, the file read is performed on the smallest unit of access, for example, in units of sectors. However, it is also possible to read l tracks as an intermediate step. .

Next, the procedure of copy processing according to the present invention will be explained with reference to FIG.

(1) First, the CPU 207 reads a system program for file backup from the floppy disk 206, starts it, and also uses the keyboard
08 according to user guidance (not shown) and sets copy information (Step 1) (2) Next, the CPU 207 reads the maximum amount that can be read from the built-in hard disk according to the file backup system program. data, for example, the maximum amount of data in the read buffer, and when reading of this information file is completed, it is checked whether the read operation is normal (step 2.3).

(3) If an error occurs in step 3, read processing is performed one sector at a time from the same address, and when the read of one sector of information file is completed, the error check processing is performed and If so, create dummy data for that data (step 4).
~6).

(4) Repeat steps 4 to 6, count the usable read buffer, and confirm the completion of processing for the read buffer amount of sectors (step 7).
).

(5) After step 7 is completed, or if no read error occurs in step 3, the file is switched and the program automatically transfers control from the built-in hard disk 101 to the file backup hard disk 102 (step 8 ).

(6) Next, read data from the built-in hard disk 101 or write the data in the file backup hard disk 102 to the file backup hard disk 102, and when the writing of this information file is completed, check whether or not this write operation was performed normally. Confirm (step 9.10).

(7) In step 10, if no error occurs, use the same address as the write address and read the data just written for the same sector, and when the reading of this information file is completed, this read operation will be completed normally. Check whether it has been done (step 13.14).

(8) If there is no error in step 14, the write data in step 9 and the read data in step 13 are checked on the conveyor in minimum units. As a result, if there is no error and both data are recognized as the same file, the copy completion is confirmed (steps 15 and 16).

(9) If all the copies have not been completed in step 16, count up the addresses, execute file switching, and transfer the files to the backup hard disk 102.
The program automatically restores internal hard disk 1.
Control is transferred to step 01, and the processes from step 2 described above are repeatedly executed to continue copying unprocessed files (steps 17 to 19).

(10) If all the copies have been completed in step 16, the address where the dummy data has been written is displayed as a copy completion result, and the copy process is ended (step 17.12).

(11) If an error is confirmed in the error check process of step 10.14.15, the error address is displayed and the copy operation is ended (step 11.12).

According to the embodiment of the present invention described above, when copying a corrupted file, a large amount of data other than the corrupted data portion can be copied at one time, resulting in high-speed copy processing. Since only the data portion is replaced with readable dummy data, the information file can be backed up and copied with minimal information destruction.

Furthermore, during the copy operation, the backup hard disk is assigned to a device address that is not normally used, so information can be prevented from being destroyed due to intervention by other devices.

[@Akira's Effect] As explained above, according to the present invention, user data and the operating system can be safely, accurately, quickly, and more easily recovered in cases where all files become unrecoverable due to corruption of some files. The information can be restored onto the copy file.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram for explaining copying of information files according to an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of an embodiment of a system that executes the method according to the present invention, and FIG. Figure 4 is a diagram explaining the address setting for the recording device, Figure 4 is a diagram explaining the data mask during copy processing, Figure 5 is
The figure is a flowchart explaining the processing procedure. 101.102...Hard disk, 103.
...Damaged file, 104...New information file, 105...Dummy data, 206.
...Floppy disk, 207...C
PU, 208...Keyboard, 209...
...Display. Figure 1 Figure 1 Figure 1

Claims (1)

[Claims] 1. Between two recording devices of a computer system,
In a file backup method that copies information stored in one device to another device, the information on the reading side device is read out at once for the reading limit, and when this reading is successful, this information is transferred to the writing side device. If reading from the reading device fails, read and write information by sequentially decreasing the reading unit for reading information from the device, and write the information to the minimum unit of the recording medium that could not be read. A file backup method characterized by changing only the information in the file into accessible information and writing it to the writing device. 2. The process of copying information stored in one device to the other device is performed by assigning the device address of the writing device to an address other than the address assigned to the device by the computer system. A file backup method according to claim 1, characterized in that: 3. Between two recording devices of a computer system,
In a copying method that copies information stored in one device to another device, by assigning the device address of the writing device to an address other than the address assigned to the device by the computer system, it is possible to copy information stored in one device to another device. An information copying method characterized by preventing information destruction due to intervention.