WO2012163223A1

WO2012163223A1 - Data recovery methods and devices for bad sector of logical unit

Info

Publication number: WO2012163223A1
Application number: PCT/CN2012/075492
Authority: WO
Inventors: 刘国霞; 高军; 曹红强
Original assignee: 成都市华为赛门铁克科技有限公司
Priority date: 2011-06-02
Filing date: 2012-05-15
Publication date: 2012-12-06
Also published as: CN102193848A; CN102193848B

Abstract

Embodiments of the present invention provide data recovery methods and devices for a bad sector of a logical unit. One of the methods comprises: a host querying a bad sector of a logical unit from a disk array; the host receiving identification information, sent by the disk array, of the bad sector of the logical unit; and the host recovering, according to the identification information of the bad sector of the logical unit, data stored in the bad sector of the logical unit. In the embodiments of the present invention, the host can actively recover data stored in a bad sector of a logical unit, so that the problem that data stored in a bad sector of a logical unit cannot be passively recovered until access of the host to the bad sector of the logical unit is triggered by a service in the prior art is avoided, and the recovery timeliness is enhanced.

Description

Data repairing method and device for bad sector of logical unit This application claims to be Chinese patent filed on June 2, 2011, Chinese Patent Office, application number 201110147934.4, and the invention titled "data repair method and device for logical unit bad sector" Priority of the application, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present invention relates to communication technologies, and in particular, to a data repair method and apparatus for a bad sector of a logical unit. Background technique

Redundant Array of Independent Disk (f3⁄4 RAID), also known as a disk array (Disk Array), is a combination of multiple independent hard disks (physical hard disks) in different ways. A hard disk group (logical hard disk). The hard disk array can use striping technology to distribute data to each hard disk. Each strip can be regarded as a logical unit (Logical Unit), which can use a logical unit number (Logical Unit Number). Said LUN) for identification. Each logical unit is spread over a contiguous block, and the data is divided into blocks from 512 bytes to several megabytes, and then written to the respective hard disks. The hard disk array can use the redundant data in the strip (that is, strip redundant data) to write and repair corrupted data in the strip.

However, if the hard disk array does not have strip redundant data, for example: When one hard disk in RAID 5 fails, it can no longer repair another failed hard disk, or RAID 0 itself has no striped redundant data. If the damaged data in the stripe cannot be write-repaired, a bad sector corresponding to the corrupted data, that is, a bad sector of the logical unit appears. When the host is triggered by the service to access the bad sectors of the logical unit, the bad sectors of the logical unit can be found and repaired, thereby reducing the timeliness of repair. Embodiments of the present invention provide a data repair method and apparatus for a bad sector of a logical unit, which are used to improve the timeliness of repair.

An embodiment of the present invention provides a data repair method for a bad sector of a logical unit, including: the host queries a hard disk array for a bad sector of the logical unit;

The host receives the identification information of the bad sector of the logical unit sent by the hard disk array; the host repairs the data stored in the bad sector of the logical unit according to the identification information of the bad sector of the logical unit.

The embodiment of the present invention provides another data repair method for a bad sector of a logical unit, including: the hard disk array stores the identification information of the bad sector of the logical unit;

The hard disk array sends, to the host, identification information of the bad sectors of the logical unit that is queried by the host, so that the host stores the bad sectors of the logical unit according to the identification information of the bad sectors of the logical unit. The data is fixed.

The embodiment of the invention further provides a host, including:

The query unit is configured to query the hard disk array for a bad sector of the logical unit;

a receiving unit, configured to receive identification information of a bad sector of a logical unit sent by the hard disk array, and a repairing unit, configured to perform, according to the identification information of the bad sector of the logical unit, data stored in a bad sector of the logical unit repair.

The embodiment of the present invention further provides a hard disk array, including at least two hard disks and a hard disk controller, where the hard disk controller includes:

a storage unit, configured to store identification information of a bad sector of the logical unit;

a sending unit, configured to send, to the host, identifier information of the bad sector of the logical unit that is queried by the host, so that the host sends a bad fan to the logical unit according to the identifier information of the bad sector of the logical unit The data stored in the area is repaired.

According to the foregoing technical solution, the host in the embodiment of the present invention queries the hard disk array for the bad sector of the logical unit, so that the host receives the identification information of the bad sector of the logical unit sent by the hard disk array, and further may be based on the bad sector of the logical unit. The identification information is used to repair the data stored in the bad sector of the logical unit. Because the host can actively repair the data stored in the bad sector of the logical unit, the host in the prior art can only be triggered by the service. When the bad sector of the unit is used, the problem of repairing the data stored in the bad sector of the logical unit can be passively repaired, thereby improving the timeliness of repair. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only the present invention. In some embodiments, other drawings may be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a schematic flow chart of a data repairing method for a bad sector of a logical unit according to an embodiment of the present invention;

2 is a schematic flowchart of a data repairing method for a bad sector of a logical unit according to another embodiment of the present invention;

3 is a schematic structural diagram of a host according to another embodiment of the present invention;

4 is a schematic structural diagram of a host according to another embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a hard disk array according to another embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a hard disk array according to another embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a hard disk array according to another embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

1 is a schematic flowchart of a method for repairing a bad sector of a logical unit according to an embodiment of the present invention. As shown in FIG. 1, the data repair method for a bad sector of a logical unit in this embodiment may include:

1 01. The host queries the hard disk array for a bad sector of the logical unit;

Specifically, the host may periodically query the hard disk array for a bad sector of the logical unit. Write and repair corrupted data in the strip. If the hard disk array does not have strip redundant data, for example: When one hard disk in RAID 5 fails, it can no longer repair another failed hard disk, or RAID 0 itself has no striped redundant data, etc. When the damaged data in the strip is written and repaired, a bad sector corresponding to the corrupted data, that is, a bad sector of the logical unit appears. At this time, the hard disk array can store the identification information of the bad sectors of the logical unit. For example: The identification information of the bad sectors of the logical unit may include, but is not limited to, a LUN, a logical block address (LBA), and a length (Length).

The above host receives the identification information of the bad sector of the logical unit sent by the hard disk array. Specifically, the host can receive the logical unit stored in the hard disk array sent by the hard disk array. The identification information of the sector.

1 03. The host performs repair on the data stored in the bad sector of the logical unit according to the identifier information of the bad sector of the logical unit.

For example, the host may determine the bad sectors of the logical unit according to the identification information of the bad sectors of the logical unit, and then repair the data stored in the bad sectors of the logical unit.

For example, the host can determine the file identifier corresponding to the identifier information of the bad sector of the logical unit according to the correspondence between the identifier information of the bad sector of the logical unit and the file identifier. Finally, it can be understood that, in this embodiment, The method for the host to repair the data stored in the bad sector of the logical unit may be, for example, obtaining data stored in the bad sector of the logical unit by backing up data or other means, and sending a write request to the hard disk array, and the obtained data Rewrite.

It should be noted that, in the embodiment of the present invention, the execution entity may be other devices such as a server in addition to the host.

In this embodiment, the host queries the hard disk array for the bad sectors of the logical unit, so that the host receives the identification information of the bad sectors of the logical unit sent by the hard disk array, and further, according to the identification information of the bad sectors of the logical unit, the logic is The data stored in the bad sector of the unit is repaired. In this embodiment, the host can actively repair the data stored in the bad sector of the logical unit, so as to prevent the host from passively storing the bad sector of the logical unit when the host can only access the bad sector of the logical unit by the service. The data is fixed to fix the problem, thus improving the timeliness of repair.

Optionally, if the host repairs the bad sector of the logical unit successfully, the host may indicate to the hard disk array that the logical unit is successfully repaired, so that the hard disk array is successfully Delete the identification information of the bad sectors of the above logical unit.

Optionally, if the host repairs the bad sector of the logical unit successfully, the hard disk array may delete the identification information of the bad sector of the logical unit.

Optionally, before the 101, the host in this embodiment may further receive the upcoming failure information sent by the hard disk array, where the invalidation information includes the identification information of the logical unit, and the foregoing invalidation information is a bad fan in the logical unit. When the size of the area exceeds a preset size threshold, the hard disk array sends the data; then, the host may back up or migrate the data of the bad sector corresponding to the logical unit according to the identifier information of the logical unit. These backup data can be used as reference data when the host repairs the data stored in the bad sectors of the logical unit. The identifier information of the foregoing logical unit may include but is not limited to a LUN.

FIG. 2 is a schematic flowchart of a method for repairing a bad sector of a logical unit according to another embodiment of the present invention. As shown in FIG. 2, the data repair method for a bad sector of a logical unit in this embodiment may include:

201. The hard disk array stores identification information of a bad sector of the logical unit;

Specifically, the hard disk array can utilize the redundant data (ie, strip redundant data) in the strip to write and repair the damaged data in the strip. If the hard disk array does not have strip redundant data, for example: When one hard disk in RAID 5 fails, it can no longer repair another failed hard disk, or RAID 0 itself has no striped redundant data, etc. When the damaged data in the strip is written and repaired, a bad sector corresponding to the corrupted data, that is, a bad sector of the logical unit appears. At this time, the hard disk array can store the identification information of the bad sectors of the logical unit. For example: The identification information of the bad sectors of the logical unit may include but is not limited to LUN, LBA and length.

202. The foregoing hard disk array sends, to the host, the bad sector of the foregoing logical unit that is queried by the host. And identifying information, so that the host repairs the data stored in the bad sector of the logical unit according to the identifier information of the bad sector of the logical unit.

Optionally, if the host repairs the bad sector of the logical unit successfully, the hard disk array may further receive the indication information sent by the host to indicate that the logical unit is successfully repaired by the logical unit, and then delete the bad sector of the logical unit. Identification information.

Optionally, after 201, when the size of the bad sector in the logical unit of the hard disk array exceeds a preset size threshold, the hard disk array in this embodiment may further send the upcoming failure information to the host, and the foregoing invalidation information And the identifier information of the logical unit is configured to enable the host to back up or migrate data of the bad sector corresponding to the logical unit according to the identifier information of the logical unit. These backup data can be used as reference data for the host to repair the data stored in the bad sectors of the logical unit. The identification information of the foregoing logical unit may include, but is not limited to, a LUN.

In this embodiment, when the hard disk array stores the identification information of the bad sectors of the logical unit, so that the host queries the hard disk array for the bad sectors of the logical unit, the hard disk array can send the identification information of the bad sectors of the logical unit that is queried by the host to the host. Therefore, the host can further repair the data stored in the bad sector of the logical unit according to the identification information of the bad sector of the logical unit. In this embodiment, the hard disk array can provide the host with the identification information of the bad sectors of the logical unit according to the active query of the host, so that the host can actively repair the data stored in the bad sectors of the logical unit, thereby avoiding the host in the prior art. When the service triggers access to the bad sectors of the logical unit, the problem of repairing the data stored in the bad sectors of the logical unit can be passively repaired, thereby improving the timeliness of repair. It should be noted that, for each of the foregoing method embodiments, for the description of the package, it is expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present invention. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the above embodiments, the descriptions of the various embodiments are different, and the details are not described in the specific embodiments. For details, refer to related descriptions of other embodiments.

FIG. 3 is a schematic structural diagram of a host according to another embodiment of the present invention. As shown in FIG. 3, the host in this embodiment may include a query unit 31, a receiving unit 32, and a repair unit 33. The query unit 31 is configured to query the hard disk array for the bad sectors of the logical unit; the receiving unit 32 is configured to receive the identification information of the bad sectors of the logical unit sent by the hard disk array; and the repair unit 33 is configured to use the foregoing logic received by the receiving unit 32. The identification information of the bad sector of the unit is used to repair the data stored in the bad sector of the logical unit.

The functions of the host in the embodiment corresponding to the foregoing FIG. 1 and FIG. 2 can be implemented by the host provided in this embodiment.

Further, the repairing unit 33 in this embodiment may specifically determine, according to the correspondence between the identification information of the bad sector of the logical unit and the file identifier, a file identifier corresponding to the identification information of the bad sector of the logical unit, and corresponding to the file identifier. The documents are recovered.

Further, if the repairing of the logical unit bad sector is successful, the repairing unit 33 in this embodiment may further indicate to the hard disk array that the logical unit bad sector repair is successful, so that the hard disk array deletes the logical unit bad sector. Identification information.

Further, the query unit 31 in this embodiment may periodically periodically report to the foregoing hard disk array. Query the bad sectors of the logical unit.

In this embodiment, the host queries the hard disk array for the bad sectors of the logical unit through the query unit 31, so that the receiving unit 32 receives the identification information of the bad sectors of the logical unit sent by the hard disk array, and the repair unit 33 can also use the logical unit according to the logical unit. The identification information of the area is used to repair the data stored in the bad sector of the above logical unit. In this embodiment, the host can actively repair the data stored in the bad sector of the logical unit, so as to prevent the host from passively storing the bad sector of the logical unit when the host can only access the bad sector of the logical unit by the service. The data is fixed to fix the problem, thus improving the timeliness of repair.

Further, as shown in FIG. 4, the host in this embodiment may further include a processing unit 41, configured to receive the upcoming invalidation information sent by the hard disk array, where the impending failure information includes the identification information of the logical unit, and the foregoing invalidation information is When the size of the bad sector in the logical unit exceeds a preset size threshold, the data of the bad sector corresponding to the logical unit is backed up or migrated according to the identifier information sent by the hard disk array.

FIG. 5 is a schematic structural diagram of a hard disk array according to another embodiment of the present invention. As shown in FIG. 5, the hard disk array of this embodiment may include at least two hard disks 51 and a hard disk controller 52. The hard disk controller 52 may include a storage unit 521 and a transmitting unit 522. The storage unit 521 is configured to store the identifier information of the bad sector of the logical unit; the sending unit 522 is configured to send, to the host, the identifier information of the bad sector of the logical unit that is queried by the host, so that the host is in accordance with the bad sector of the logical unit. The identification information is used to repair the data stored in the bad sector of the logical unit.

The functions of the hard disk array in the embodiment corresponding to the foregoing FIG. 1 and FIG. 2 can be implemented by the hard disk controller 52 in the hard disk array provided in this embodiment.

Further, as shown in FIG. 6, the hard disk controller 52 in this embodiment may further include A deletion unit 523 is included. Optionally, if the host repairs the bad sector of the logical unit successfully, the deleting unit 523 may receive the indication information sent by the host to indicate that the logical unit is successfully repaired, and delete the bad sector of the logical unit. Identification information; Optionally, if the host repairs the bad sector of the logical unit successfully, the deleting unit 523 may directly delete the identification information of the bad sector of the logical unit.

Further, as shown in FIG. 7, the hard disk controller 52 in this embodiment may further include an indication unit 524, when the size of the bad sector in the logical unit stored by the storage unit 521 exceeds a preset size threshold. Sending the expiration information to the host, the foregoing invalidation information includes the identification information of the logical unit, so that the host backs up or migrates the data of the bad sector corresponding to the logical unit according to the identification information of the logical unit.

In this embodiment, the hard disk array stores the identification information of the bad sectors of the logical unit through the storage unit 521 of the hard disk controller 52, so that when the host queries the hard disk array for the bad sectors of the logical unit, the sending unit 522 of the hard disk controller can send the sending unit 522 to the host. The identifier information of the bad sector of the logical unit that is queried by the host, so that the host can further repair the data stored in the bad sector of the logical unit according to the identification information of the bad sector of the logical unit. In this embodiment, the hard disk array can provide the host with the identification information of the bad sectors of the logical unit according to the active query of the host, so that the host can actively repair the data stored in the bad sectors of the logical unit, thereby avoiding the host in the prior art. When the service triggers access to the bad sectors of the logical unit, the problem of repairing the data stored in the bad sectors of the logical unit can be passively repaired, thereby improving the timeliness of repair.

A person skilled in the art can clearly understand that for the convenience and cleanness of the description, the specific working processes of the system, the device and the unit described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be further described herein. In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form. The components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a USB flash drive, a mobile hard disk, and a read only memory. (Read-Only Memory, ROM, ), Random Access Memory (RAM), disk or optical disk, and other media that can store program code.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

A data repair method for a bad sector of a logical unit, comprising: querying a hard disk array for a bad sector of a logical unit;

Receiving identification information of a bad sector of a logical unit sent by the hard disk array;

And repairing data stored in the bad sector of the logical unit according to the identification information of the bad sector of the logical unit.

The method according to claim 1, wherein the repairing the data stored in the bad sector of the logical unit according to the identification information of the bad sector of the logical unit comprises:

Determining, according to a correspondence between the identification information of the bad sector of the logical unit and the file identifier, a file identifier corresponding to the identification information of the bad sector of the logical unit;

The file corresponding to the file identifier is duplicated.

The method according to claim 1, wherein the repairing the data stored in the bad sector of the logical unit according to the identification information of the bad sector of the logical unit, further comprising:

When the logical unit bad sector repair is successful, indicating to the hard disk array that the logical unit bad sector repair is successful, so that the hard disk array deletes the identification information of the logical unit bad sector.

The method according to any one of claims 1 to 3, wherein the querying the bad sectors of the logical unit to the hard disk array further includes:

Receiving the upcoming failure information sent by the hard disk array, where the invalidation information includes logic And backing up or migrating data of the bad sector corresponding to the logical unit according to the identifier information of the logical unit.

A data repair method for a bad sector of a logical unit, comprising: storing identification information of a bad sector of a logical unit;

Sending, to the host, the identifier information of the bad sector of the logical unit that is queried by the host, so that the host repairs the data stored in the bad sector of the logical unit according to the identifier information of the bad sector of the logical unit.

The method according to claim 5, wherein the method further comprises: when the host repairs that the logical unit bad sector is successful, receiving, by the host, indicating that the logical unit is bad The sector repairs the indication information of the success, and deletes the identification information of the bad sector of the logical unit.

The method according to claim 5 or 6, wherein the storing the identification information of the bad sector of the logical unit further comprises:

When the size of the bad sector in the stored logical unit exceeds a preset size threshold, sending the upcoming failure information to the host, where the invalidation information includes the identification information of the logical unit, so that the host according to the The identification information of the logical unit backs up or migrates the data of the bad sector corresponding to the logical unit.

8. A host, characterized in that:

a receiving unit, configured to receive an identifier identifying unit of a logical unit bad sector sent by the hard disk array, configured to repair the logic according to the identifier information of the bad unit of the logical unit.

The host according to claim 8, wherein the repairing unit is specifically configured to:

And determining, according to the correspondence between the identifier information of the bad sector of the logical unit and the file identifier, a file identifier corresponding to the identifier information of the bad sector of the logical unit, and recovering the file corresponding to the file identifier.

The host according to any one of claims 8 to 9, wherein the host further comprises:

a processing unit, configured to receive impending failure information sent by the hard disk array, where the invalidation information includes identifier information of the logical unit, and the bad sector corresponding to the logical unit according to the identification information of the logical unit Data is backed up or migrated.

1 1. A hard disk array, comprising at least two hard disks and a hard disk controller, wherein the hard disk controller comprises:

a sending unit, configured to send, to the host, identifier information of the bad sector of the logical unit that is queried by the host, so that the host stores the bad sector of the logical unit according to the identifier information of the bad unit of the logical unit The data is fixed.

The hard disk array according to claim 1 , wherein the hard disk controller further includes a deleting unit, and is configured to:

And if the host repairs the logical unit bad sector successfully, receiving indication information sent by the host to indicate that the logical unit is successfully repaired by the bad unit, and deleting the identification information of the bad unit of the logical unit.

The hard disk array according to claim 1 or 12, wherein the hard display unit is used for And when the size of the bad sector in the logical unit stored by the storage unit exceeds a preset size threshold, sending, to the host, the invalidation information, where the invalidation information includes the identification information of the logical unit, so that The host backs up or migrates the data of the bad sector corresponding to the logical unit according to the identification information of the logical unit.

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