KR100640602B1 - Method for restoring data in disk drive - Google Patents

Abstract

Disclosed is a data recovery method of a disk drive. In the data recovery method according to the present invention, a process of backing up data recorded on a disk in a data zone, storing position indication information of recorded data and position indication information of the backup data in a system zone, and storing a hard disk based on the size of the backup data Reducing the maximum logical block address of the drive and restoring the data of the area where the backup data is located to the area where the record data is located based on the stored position indication information when the record data is damaged. According to the present invention, the data of the HDD can be recovered without a separate storage medium and booting process other than the HDD.

Description

{Method for restoring data in disk drive}

1 is a plan view of a typical hard disk drive.

FIG. 2 is a schematic diagram dividing the disk surface of FIG.

3 is a flowchart of a data backup process in a data recovery method according to an embodiment of the present invention.

4 is a flowchart of a data recovery process in a data recovery method according to an embodiment of the present invention.

The present invention relates to a disk drive, and more particularly, to a data recovery method of a disk drive.

Generally, hard disk drives (hereinafter, HDDs) are used as auxiliary storage devices in computer systems such as PCs. In the process of using the HDD, data stored in the HDD may be deleted, changed, or automatically executed regardless of the user's intention. Such a case is caused, for example, by a virus attack or abnormal operation of the OS.

When this happens, an error occurs on the PC using the HDD. The user is then inconvenient to recover all the data on the HDD in order to heal it. For example, a user may have to format a hard disk and newly install an operating system (OS), various drivers, and various initial programs one by one.

Conventionally, in order to alleviate this inconvenience, an image of data to be stored using an application program is first copied to a floppy disk or CD. When the data of the HDD needs to be recovered, the data of the HDD was restored by copying the image to a predetermined area using the corresponding application program.

However, this method has a problem in that a medium such as an application program, a floppy disk, or a CD is required, and a PC must be booted using the medium.

On the other hand, conventionally, there is also a method for recovering the data of the HDD using a system recovery CD. A system recovery CD is provided if your PC is sold with the driver settings for the OS and peripherals complete. And, if an error occurs in the PC, drive the system recovery CD and copy the data of the CD into the HDD to restore the data of the HDD to the state at the time of sale.

However, when the system recovery CD is lost, there is a problem that it is difficult to recover the data of the HDD.

An object of the present invention is to provide a data recovery method for recovering data of a disk drive without a separate storage medium by backing up recording data in the disk drive in a method of data recovery of a disk drive.

The data recovery method according to an embodiment of the present invention for achieving the above technical problem is a data recovery method in a disk drive having a disk partitioned into a data zone for which user access is allowed and a system zone for which user access is prohibited. And backing up the data recorded on the disk in the data zone, storing the position indication information of the record data and the position indication information of the backup data in the system zone and based on the size of the backup data. Reducing a maximum logical block address of a drive and restoring data of an area where the backup data is located to an area where the write data is located based on the stored position indication information when the write data is damaged.

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

1 is a plan view of a typical hard disk drive 100. Referring to FIG. 1, hard disk drive 100 may include one or more magnetic disks 102 that are rotated by a spindle motor 104.

Spindle motor 104 may be mounted to a base plate 106 of disk drive 100. The disk drive 100 may further include a cover 108 that wraps the disks 102.

The disk drive 100 may include a plurality of heads 110. Each head 110 is located adjacent to the rotating disk 102. Each head 110 may have separate write and read elements (both not shown) that magnetize and sense the magnetic fields of the disks 102.

Each head 110 may be mounted on a flexure 112 to form a head gimbal assembly (HGA) to be horizontal. The flexure 112 is attached to an actuator arm 114, and the actuator arm 114 is rotatably mounted to the base plate 106 by a bearing assembly 116.

Voice coil 118 is connected to magnet assembly 120 to produce a voice coil motor (VCM). Providing current to the voice coil 118 creates a torque that rotates the actuator arm 114 and causes the heads 110 to move across the surfaces of the disks 102.

Disk drive 100 may further include a printed circuit board assembly 124. The printed circuit board assembly 124 may include a plurality of integrated circuits 126 connected to the printed circuit board 128. The printed circuit board 128 is connected to the voice coil 118, the heads 110, and the spindle motor 104 by wires (not shown).

FIG. 2 is a schematic diagram of a partitioned surface of the disk 102 of FIG. Referring to FIG. 2, disk 102 is largely divided into system zone 210, data zone 220 and parking zone 230. As shown in FIG.

The system zone 210 is also called a maintenance area, and stores various system information and information for maintenance of the hard disk drive, and is an area to which general users are not allowed to access.

The data zone 220 is an area to which general users have access, and is an area for storing user data.

The parking area 230 is an area used when the head 110 is parked and is an area where data cannot be recorded.

In more detail, the system zone 210, a manufacturer of a hard disk drive may have a unique number of the drive in the current manufacturing process, relevant information during the manufacturing process, defect log in data, a defect list or SMART. (Self-Monitoring Analysis Reporting Technology) Information related to various systems, such as information, is recorded in the system section 210 on the disk and read out and used if necessary.

Since the information stored in the system zone 210 is unique to each drive, the information stored in the system zone 210 cannot be included in the ROM. As described above, the information stored in the system zone 210 is written to the system zone 210 and read into the RAM of the drive as needed. Will be used later. The number of tracks allocated to the system zone 210 is typically assigned from one to four.

Information necessary for booting the computer system or information about a file storage location is generally stored in the data zone 220.

3 is a flowchart of a data backup process in a data recovery method according to an embodiment of the present invention. Referring to FIG. 3, a user first installs an operating system (OS), a driver, or the like in a computer system. Data on the installed OS, the driver, and the like are recorded in the HDD (S310).

After the OS, driver, etc. are set in the HDD, an error may occur in the computer system due to a virus attack or abnormal operation of the OS. In case of such a case, the following process backs up the current state of data recorded on the hard disk drive.

If the record data to be backed up is recorded in the HDD, the computer system transmits a backup command to the HDD, and at this time, also transmits position indication information of the record data. In the following description, the record data refers to original data that is a backup target.

The backup command sent is a promised signal that requests the HDD to execute the backup function. For example, a vendor unique command corresponds to this. Company-specific commands are commands that are not open to the general public and are limited to specific companies that are promised.

The means for sending a vendor-specific command may be implemented by executing an application or adding a separate menu while the OS such as Windows is booted. The reason for this is to allow the OS to know the start position and the end position of the record data.

And this transmission means consists only of a simple operation of a user. For example, when a user inputs a simple command set by using a keyboard or a mouse, the application program transmits position indication information of the backup command and the recording data to the HDD.

In addition, when a dedicated key for transmitting a backup command is set on the keyboard, when the user clicks the dedicated key, the backup command may be transmitted to the HDD together with the position indication information of the recording data through the application program.

The position indication information of the recording data is information indicating the position of the recording data on the disk of the HDD.

In general, data zone 220 is divided into logical blocks. At this time, an address indicating each logical block is a logical block address (LBA). The maximum LBA is the maximum value that a logical block address can have on disk.

The logical block pointed to by the maximum LBA is typically located at the end of the data zone 220 and neighbors the boundary of the data zone 220 and the system zone 210. The user's access to the area after the logical block pointed to by the maximum LBA on the disk is prohibited.

The position indication information of the recording data may be a start LBA and an end LBA of the recording data. The start LBA of the recording data is the LBA indicating the start position of the recording data, and the end LBA of the recording data is the LBA indicating the last position of the recording data.

The HDD having received the backup command and the position indication information of the recording data backs up the recording data to a predetermined position (S330). That is, the HDD which has received the start LBA and the end LBA of the recording data backs up the data from the start LBA to the end LBA of the recording data to a predetermined position.

The HDD backs up the write data into the data zone 220 of the disc. The position where the record data is backed up is next to the boundary between the data zone 220 and the system zone 210 of the disc. That is, the area where the backup data is located is adjacent to the boundary between the data zone 220 and the system zone 210 of the disk.

For example, when the start LBA of the record data is 2, the end LBA is 4, and the maximum LBA of the HDD is 20, the start LBA at the position where the record data is backed up is 18 and the end LBA is 20. When the start LBA of the recording data is 11, the end LBA is 15, and the maximum LBA of the HDD is 50, the start LBA at the position where the recording data is backed up is 46 and the end LBA is 50.

However, the recording data of the HDD may be backed up in an area separated by a predetermined distance from the boundary between the data zone 220 and the system zone 210.

Recorded data is backed up via the internal memory of the HDD. That is, the HDD once stores data from the start LBA to the end LBA of the recording data in the internal memory of the HDD. The HDD backs up the record data stored in the internal memory of the HDD to a predetermined position.

As such, the backup process is performed internally by the HDD which received the backup command. Accordingly, the backup process is performed by the HDD itself without the recording data being transferred to the outside of the HDD.

When the backup is completed, the HDD stores the position indication information of the recording data and the position indication information of the backup data in the system zone 210 of the disc (S340). As described above, the location indication information may be a start LBA and an end LBA.

The HDD changes the maximum LBA of the HDD (S350). Specifically, the HDD reduces the maximum LBA of the HDD based on the size of the backup data. Accordingly, the user's access to the area where the backup data is located is prohibited.

For example, if the start LBA of the historical data is 2, the end LBA of the historical data is 4, the native maximum LBA is 20, the start LBA of the backup data is 18, and the end LBA of the backup data is 20, The size of the data corresponds to three logical blocks. At this time, the HDD decreases the maximum LBA to 17. As a result, the user's access to the area where the backup data is located is prohibited.

If the start LBA of the record data is 11, the end LBA is 15, and the raw maximum LBA of the HDD is 50, the HDD decreases the maximum LBA to 45.

When the recording data of the HDD is backed up in an area separated by a predetermined distance from the boundary between the data zone 220 and the system zone 23, the maximum LBA is reduced so that the maximum LBA becomes less than the start LBA of the backup data.

4 is a flowchart of a data recovery process in a data recovery method according to an embodiment of the present invention. Referring to Fig. 4, if the recording data is damaged while using the computer system, the computer system transmits a recovery command to the HDD (S410). Specifically, when a recovery command is input from the user, the BIOS or the like detects the HDD and transmits the recovery command to the HDD.

The restore command sent is a promised signal that requests the HDD to execute the restore function. For example, a vendor unique command corresponds to this. The means for sending a recovery command can be implemented by running an application program or adding a separate menu while the OS such as Windows is booted.

The transmission means for transmitting the recovery command is made only by a simple operation of the user. For example, a recovery command is transmitted to the HDD only by the user inputting a simple command set using a keyboard or a mouse.

In addition, when a dedicated key for transmitting a recovery command is set in the keyboard, when the user clicks the dedicated key, the recovery command may be transmitted to the HDD through an application program.

Upon receiving the recovery command, the HDD restores the data of the area where the backup data is located to the area where the record data is located based on the location indication information stored in the system area 210. That is, the HDD restores the backup data to an area from the start LBA of the stored record data to the end LBA of the stored record data (S420).

Specifically, when the HDD receives the recovery command, the HDD searches for an area where the backup data is located based on the location indication information of the backup data stored in the system zone 210. The HDD stores the data of the area where the backup data is located in the internal memory of the HDD.

After that, the HDD finds an area where the recording data is located based on the start LBA and the end LBA of the recording data stored in the system zone 210. The HDD then recovers the backup data stored in the internal memory to the areas from the start LBA to the end LBA of the record data.

For example, in the system zone 210, if the start LBA of the record data is stored as 2 and the end LBA is stored as 4, the backup data is restored to the areas from LBA2 to LBA4.

In this way, the backup data is restored to the position of the recording data via the internal memory of the HDD. That is, the recovery process is performed internally by the HDD which received the recovery command. Accordingly, the recovery process is performed by the HDD itself without receiving backup data from the outside of the HDD.

Although the area where the backup data is located is located within the data zone 220, the user is prohibited from access. Thus, the space on the disk where user access is allowed is small. Therefore, there may occur a case where the backup data is deleted after the backup data has been restored to the location of the recording data, and then the backup information is deleted to recover the space to which user access is allowed.

In this regard, it may be determined whether to delete the backup information according to a preset option value. For example, assume that the option value for deleting backup information is 0 and the option value for deleting backup information is 1.

The HDD determines whether to delete the backup information by checking the option value (S430). If the option value is 1, the HDD deletes LBA information stored in the system area 210 (S440). Then, the maximum LBA is changed to the original maximum LBA (S450). As a result, the backup information stored in the HDD is deleted, and the space for the user access is restored.

The original maximum LBA is the maximum LBA before the backup process. That is, when the maximum LBA before the backup process is 20 but the maximum LBA is changed to 17 according to the backup process, the maximum LBA is changed back to 20 when the option value is 1.

On the other hand, in the description of the embodiment of the present invention, an example of a hard disk drive is given. However, those skilled in the art will appreciate that the present invention also differs in an apparatus for driving a tracked disk, for example, an optical disk drive and a magneto-optical disk drive. It will be appreciated that it can be applied without difficulty.

The invention can also be embodied as computer readable code on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, hard disk, floppy disk, flash memory, optical data storage device, and also carrier wave (for example, transmission over the Internet). It also includes the implementation in the form of. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

As described above, according to the present invention, the backup image can be copied to a predetermined area of the HDD through a simple operation, and the backup image inside the HDD can be recovered without OS booting.

Accordingly, a backup process and a recovery process are performed by the HDD itself, and data within the HDD can be recovered without an external booting medium or an application program.

Even in a PC that is sold with the driver settings of the OS and peripheral devices completed and a system recovery CD is provided, the backup data is stored on the HDD itself and data can be recovered through easy operation. There is no need to keep the media separately.

Claims (6)

In the data recovery method of a disk drive having a disk divided into a data zone for which user access is allowed and a system zone for which user access is prohibited. a) backing up data recorded in the data zone in the data zone; b) storing the position indication information of the record data and the position indication information of the backup data in the system zone, and reducing the logical block address maximum value of the data zone based on the size of the backup data; and and c) restoring data of an area where the backup data is located to an area where the record data is located based on the stored position indication information when the record data is damaged. The method of claim 1, wherein the data recorded on the disc is backed up. The data recorded on the disk is backed up via the internal memory of the hard disk drive. 2. The position indication information of the record data according to claim 1, And a logical block address indicating a start position of the write data and a logical block address indicating a last position. The method of claim 1, wherein the area where the backup data is located And at a boundary between the data zone and the system zone. The method of claim 1, wherein the restoring the backup data to an area where record data is located. And the backup data is restored via the internal memory of the hard disk drive. The method of claim 1, and d) deleting the stored position indication information and changing the maximum logical block address value of the hard disk drive to an original maximum logical block address value.

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