WO2016112824A1

WO2016112824A1 - Storage processing method and apparatus, and storage device

Info

Publication number: WO2016112824A1
Application number: PCT/CN2016/070392
Authority: WO
Inventors: 杨天文; 黄庆成; 毕德春
Original assignee: 华为技术有限公司
Priority date: 2015-01-13
Filing date: 2016-01-07
Publication date: 2016-07-21
Also published as: CN104572374A; CN104572374B

Abstract

A storage processing method and apparatus, and a storage device (13). The method is applied to the storage device (13). The storage device (13) comprises a plurality of hard disks (14). The plurality of hard disks (14) is fixed in the storage device (13); the hard disk (14) comprises an integer capacity and a scattered capacity; and the integer capacity of each hard disk (14) comprises N blocks, N being a positive integer. The method comprises: when a first hard disk in the plurality of hard disks is faulty, determining that a faulty block is a first block (101); acquiring a second block in a redundancy capacity pool of the storage device (102), a capacity of the second block being not less than a capacity of the first block, and the redundancy capacity pool comprising the scattered capacities of the plurality of hard disks; and reconstructing data in the first block, and storing the data into the second block (103). According to the method, the scattered capacities of the hard disks are effectively used for expansion of the storage device, and maintenance costs and device costs are reduced.

Description

Storage processing method, device and storage device

Technical field

The embodiments of the present invention relate to communication technologies, and in particular, to a storage processing method, apparatus, and storage device.

Background technique

A storage device is a device for storing information, usually by digitizing information and then storing it by means of electrical, magnetic or optical means.

FIG. 1 is a schematic structural diagram of a storage device in the prior art. As shown in FIG. 1 , the storage device 1 includes a plurality of hard disk modules 2 , and each of the hard disk modules 2 includes a plurality of hard disk units 3 and a plurality of hot spare disks 4 . During the life of a storage device, when a disk unit 3 fails, the system automatically replaces the failed disk unit 3 with the hot spare disk 4 and stores the data in the failed disk unit in the hot spare disk. . For a failed hard drive, the maintenance personnel will use the new hard drive to replace the failed hard drive. The hard drive is designed with a handle bar to replace the failed hard drive with hot swap.

However, for a failed hard disk, the maintenance personnel directly use the new hard disk to replace the failed hard disk, which increases maintenance costs and equipment costs.

Summary of the invention

The embodiment of the invention provides a storage processing method, a device, and a storage device. The hard disk is fixed in the storage device, and the storage device is expanded by using the scattered capacity of the hard disk, thereby avoiding the direct replacement of the new hard disk by the prior art. The hard disk adds technical problems of maintenance cost and equipment cost, thereby effectively saving maintenance costs and hardware costs.

A first aspect of the embodiments of the present invention provides a storage processing method, which is applied to a storage device, where the storage device includes a plurality of hard disks, and the plurality of hard disks are fixed inside the storage device, and the hard disks include an integer capacity and a scattered capacity. And the integer capacity of each hard disk includes N Blocks, where N is a positive integer, the method includes:

When the first hard disk of the plurality of hard disks fails, determining that the failed block is the first block;

Acquiring a second partition in the redundant capacity pool of the storage device; wherein, the capacity of the second partition is not less than the capacity of the first partition, and the redundant capacity pool includes the multiple hard disks Scattered capacity;

Reconstructing data in the first partition and storing the data in the second partition.

In a first possible implementation manner of the first aspect, after the acquiring the second partition in the redundant capacity pool of the storage device, the method further includes:

Establishing a logical block address LBA mapping table; wherein the LBA mapping table is configured to store a mapping relationship between the LBA of the first partition and the LBA of the second partition.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, when the first hard disk of the multiple hard disks fails, determining that the faulty partition is the first Before a block, the method further includes:

All the blocks of the integer capacity of the plurality of hard disks are divided into M block groups; wherein M is a positive integer, and M≤N;

Allocating a logical unit number LUN for each of the block groups;

In conjunction with the second possible implementation of the first aspect, in the third possible implementation manner of the first aspect, the reconfiguring the data in the first partition includes:

Reconstructing data in the first partition according to the LUN of the block group.

A second aspect of the present invention provides a storage processing apparatus, including:

a determining module, configured to determine, when the first one of the plurality of hard disks fails, to determine that the failed block is the first block;

An acquiring module, configured to acquire a second partition in a redundant capacity pool of the storage device, where a capacity of the second partition is not less than a capacity of the first partition, and the redundant capacity pool includes a discrete capacity of the plurality of hard disks;

And a reconstruction module, configured to reconstruct data in the first partition and store the data in the second partition.

In a first possible implementation manner of the second aspect, the acquiring module is further configured to establish a logical block address LBA mapping table, where the LBA mapping table is configured to store the LBA of the first partition and the The mapping relationship between the LBAs of the second partition.

With reference to the first possible implementation of the second aspect, in a second possible implementation manner of the second aspect, the device further includes a dividing module, configured to divide all the blocks of the multiple hard disks into M Blocking groups and assigning one logical unit number LUN to each of the blocking groups; where M is a positive integer and M ≤ N.

In conjunction with the second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the reconfigurable module is further configured to reconfigure the first partition according to the LUN of the block group The data in .

A third aspect of the embodiments of the present invention provides a storage device, including: a disk array controller and a disk array, wherein the disk array includes a plurality of hard disks; and the disk array controller is configured to fail in the first hard disk in the disk array. Determining that the failed block is the first block;

In a first possible implementation manner of the third aspect, the disk array controller is configured to establish a logical block address LBA mapping table, where the LBA mapping table is configured to store the LBA of the first partition and the The mapping relationship between the LBAs of the second partition.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the disk array controller is configured to divide all the blocks of the integer capacity of the multiple hard disks into M Blocking groups and assigning one logical unit number LUN to each of the blocking groups; where M is a positive integer and M ≤ N.

In conjunction with the second possible implementation of the third aspect, in a third possible implementation manner of the third aspect, the disk array controller is further configured to reconfigure the first point according to the LUN of the block group The data in the block.

In the storage processing method provided in this embodiment, the hard disk is fixed inside the storage device. When the first hard disk of the plurality of hard disks fails, determining that the failed block is the first block and the redundancy of the storage device The second partition is obtained in the capacity pool, the data in the first partition is reconstructed, and the data is stored in the second partition. In the embodiment of the present invention, the redundant capacity of the hard disk is used as the redundant capacity pool of the storage device. When the hard disk fails, only the second capacity corresponding to the capacity of the failed block is obtained in the redundant capacity pool. The block and the reconfigured data are stored in the second block, which effectively utilizes the fragmented capacity of the hard disk to expand the storage device. Therefore, maintenance personnel are not required to replace the failed hard disk in the storage device, thereby effectively saving maintenance costs and Hardware cost.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic structural diagram of a storage device in the prior art;

2 is a schematic structural diagram of an application scenario of a storage processing method according to an embodiment of the present disclosure;

3 is a flowchart of a processing method of storage according to Embodiment 1 of the present invention;

Figure 4 is a schematic diagram of capacity allocation before a hard disk failure;

Figure 5 is a schematic diagram of capacity allocation after a hard disk failure;

FIG. 6 is a flowchart of a processing method for storing according to Embodiment 2 of the present invention;

FIG. 7 is a schematic structural diagram of a storage processing apparatus according to Embodiment 3 of the present invention; FIG.

FIG. 8 is a schematic structural diagram of a storage processing apparatus according to Embodiment 4 of the present invention; FIG.

FIG. 9 is a schematic structural diagram of a storage device according to Embodiment 5 of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the 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.

2 is a schematic structural diagram of an application scenario of a storage processing method according to an embodiment of the present invention. As shown in FIG. 2, the scenario includes a host 11, a disk array controller 12, and a storage device 13, wherein the host 11 can be a computer (personal The computer (referred to as PC) can also be a server. The storage device includes a plurality of hard disks 14 and the data is stored in the hard disk 14. The disk array controller 12 is configured to implement data storage and forwarding and management of the hard disk in the storage device. A "bridge" between storage devices.

FIG. 3 is a flowchart of a processing method of storage according to Embodiment 1 of the present invention. The storage processing method provided in this embodiment is applied to a storage device, where the storage device includes multiple hard disks, and multiple hard disks are fixed in the storage device. The hard disks include integer capacity and scattered capacity, and the integer capacity of each hard disk includes N Blocking, where N is a positive integer. The main body of the method is a disk array controller. As shown in FIG. 3, the method in this embodiment includes:

Step 101: When a fault occurs in the first hard disk of the plurality of hard disks, determining that the failed block is the first block.

In this embodiment, the hard disk may be a hard disk with a capacity marked as Xy TB type, for example, a shingled magnetic recording (SMR) hard disk, where X is an integer capacity of the hard disk, and y is a discrete capacity of the hard disk. The scattered capacity is generated when the hard disk is produced, and the discrete capacity of each hard disk may be different or the same. The integer capacity of each hard disk in the storage device includes N blocks, and the capacity size of the N and the block can be adjusted according to actual conditions, which is not limited in the present invention.

In this embodiment, the larger the capacity of the hard disk, the more the failure of one hard disk means the loss of a large capacity. However, in fact, most of the hard disk failures are caused by the failure of a certain magnetic head or a certain disk, and the rest. The head or disc can continue to be used, that is, one of the hard disks Blocking fails, and other blocks that have not failed can still be used. In this embodiment, when the disk array controller detects that one or more hard disks in the storage device are faulty, for example, the data in the hard disk cannot be read or written, the failed block is searched for, and the failed component is obtained. The partition is determined to be the first partition.

It should be noted that the first hard disk is a hard disk that fails in the storage device, and the first hard disk may be a failed hard disk or multiple failed hard disks.

Step 102: Acquire a second partition in a redundant capacity pool of the storage device.

The capacity of the second block is not less than the capacity of the first block, and the redundant capacity pool includes the scattered capacity of the plurality of hard disks.

In this embodiment, the scattered capacity of all the hard disks in the storage device is used as the redundant capacity pool of the storage device, the data in the redundant capacity pool is not stored, and the capacity of the redundant capacity pool is used as the redundant capacity of the storage device. Expand the storage device. Moreover, the integer capacity of the hard disk in the storage device is used as the primary storage capacity pool of the storage device. Since the integer capacity of each hard disk is divided into multiple partitions, the primary storage capacity pool also includes several partitions. When the storage device fails, the failed block, that is, the first block is found, and the block with the same capacity as the first block is obtained in the redundant capacity pool, that is, the second block.

Figure 4 is a schematic diagram of capacity allocation before a hard disk failure. Figure 5 is a schematic diagram of capacity allocation after a hard disk failure. As shown in FIG. 4, the storage device includes n hard disks, and the integer capacity X of each hard disk is built into a primary storage capacity pool, that is, the capacity of the primary storage capacity pool is nX, and data is stored in an integer capacity; each hard disk is stored; The capacity of the redundant capacity pool is y1+y2+y3+...yn, and there is no storage data in the fragmented capacity for capacity expansion of the storage device. As shown in FIG. 5, when the hard disk m fails, the fragment that has failed in the integer capacity of the hard disk m is found as the first partition, and the capacity of the first partition is Q, and the Q is obtained in the redundant capacity pool. The capacity of the size, and the capacity of the Q size as the capacity of the primary storage capacity pool, the capacity in the primary storage capacity pool remains unchanged, still nX, but the capacity in the redundant capacity pool becomes y1+y2+y3+... yn-Q.

It should be noted that, in this embodiment, in the hard disk that has failed, the failed block cannot be used, and the block that has not failed can continue to be used.

Step 103: Reconstruct data in the first partition and store the data in the second partition.

In this embodiment, the data stored in the first partition is reconstructed, and the reconstructed data is stored in the second partition, so that when the first partition is accessed next time, the second partition may be used. Access data. For the method of reconstructing the data in the first block, the data reconstruction method in the prior art may be used, for example, a traditional Redundant Array of Independent Disks Version 1.0 (RAID 1.0). Technology or RAID 2.0 technology, etc., reconstruct data in the fault area.

In the prior art, for a faulty hard disk, the maintenance personnel need to use a new hard disk to replace the failed hard disk. Since the hard disk failure rate is much higher than that of the ordinary hardware, and the hard disk shipment is extremely large, high maintenance is generated. Cost, and, for a failed hard disk, directly replace the failed hard disk with a new hard disk. In addition, hot swapping is required when replacing the hard disk, so it is necessary to design a handle bar to increase the equipment cost. However, the storage processing method provided by the embodiment of the present invention fixes the hard disk to the inside of the storage device. For example, the integrated design is adopted, and all the hard disks in the storage device are integrated, and the hard disk frame is hardly connected, and all the hard disks are not plugged. Or, the hard disks are grouped, and the multiple hard disks are grouped into one disk group. The disk group can be plugged in and out of the disk enclosure. The hard disks in the disk group cannot be plugged in. In addition, in the embodiment of the present invention, the storage device is expanded by using the fragmented capacity of the hard disk. When the hard disk fails, only the second component corresponding to the capacity of the failed block needs to be acquired in the redundant capacity pool. The block replaces the faulty block, and the data in the first block is reconstructed into the second block to implement data backup and recovery. Therefore, the storage processing method provided by the present embodiment does not require maintenance personnel to the storage device. The failed hard disk is replaced, thus saving maintenance costs and hardware costs.

In the storage processing method provided in this embodiment, the hard disk is fixed inside the storage device. When the first hard disk of the plurality of hard disks fails, determining that the failed block is the first block and the redundancy of the storage device The second partition is obtained in the capacity pool, the data in the first partition is reconstructed, and the data is stored in the second partition. In the embodiment of the present invention, the redundant capacity of the hard disk is used as the redundant capacity pool of the storage device. When the hard disk fails, only the second capacity corresponding to the capacity of the failed block is obtained in the redundant capacity pool. Blocks and stores the reconstructed data in the second partition, effectively utilizing the fragmented capacity of the hard disk to expand the storage device. Therefore, maintenance personnel are not required to perform the faulty hard disk in the storage device. Switching, saving maintenance costs and hardware costs.

FIG. 6 is a flowchart of a storage processing method according to Embodiment 2 of the present invention. As shown in FIG. 6, the method includes:

Step 201: Divide all the blocks of the integer capacity of the plurality of hard disks into M block groups, and assign one logical unit number LUN to each block group.

Where M is a positive integer and M≤N.

In this embodiment, the blocks of the integer capacity of different hard disks in the storage device are divided to form a block group, that is, each block group includes blocks in different hard disks, and each block is included. The group is assigned a Logical Unit Number (LUN) to facilitate management of the block group.

Step 202: When the first hard disk in the storage device fails, determine that the failed block is the first block.

Step 203: Acquire a second partition in a redundant capacity pool of the storage device.

In this embodiment, the

steps

202 and 203 are the same as the

steps

101 and 102 of the foregoing embodiment, and are not described herein again.

Step 204: Establish a logical block address (LBA) mapping table.

The LBA mapping table is configured to store a mapping relationship between the LBA of the first partition and the LBA of the second partition.

In this embodiment, each block includes at least one logical block, and each logical block corresponds to one LBA, and the LBA of each block is the LBA of the logical block included in the block, therefore, each A block may correspond to one LBA and may correspond to multiple LBAs. After the second partition is obtained from the redundant capacity pool, a mapping relationship between the LBA of the first partition and the LBA of the second partition needs to be established, and the mapping relationship is stored in the LBA mapping table. When the faulty partition is accessed next time, the LBA of the second partition may be found from the LBA mapping table according to the mapping relationship between the LBA of the first partition and the LBA of the second partition, and Access data in a binary block.

Step 205: Reconstruct data in the first partition according to the LUN of the block group, and store the data in the second block.

In this embodiment, logical operations are performed on the block groups according to the LUNs of the block group to reconstruct data in the first block and store the reconstructed data in the second block.

Specifically, RAID 2.0 technology can be used to reconstruct data, and the integer capacity of the hard disk is first cut into a plurality of chunks (usually 64 MB) according to a fixed capacity, and these small chunks are grouped to form different RAID types. Chunk Group, each chunk group corresponds to one LUN, and each chunk group includes chunks in the integer capacity of different hard disks. After a hard disk in a storage device fails, the block group in which the fault block is located is found, and the block group in which the first block is located is searched according to the LUN, and each block in the block group is Perform logical operations to reconstruct the failed blocks, thereby greatly reducing the reconstruction time, reducing the risk of data loss caused by the reconstruction of the entire hard disk data and expanding the reconstruction window, and ensuring the storage system while the capacity of the hard disk is greatly increased. Performance and reliability.

Optionally, in this embodiment, the primary storage capacity pool and the redundant capacity management pool are respectively managed by using the primary capacity management table and the redundant capacity management table. After acquiring the second data block from the redundant capacity pool, the LBA of the first data block in the primary capacity management table is mapped to the LBA of the second data block, that is, step 205, the process of establishing the LBA mapping table. Moreover, after storing the data in the second partition, the LBA of the second data block needs to be deleted in the redundant capacity management table to prevent the faulty LBA from being mapped to the first time when the hard disk fails. The LBA of the second data block.

The storage processing method provided in this embodiment divides the block of the integer capacity of the plurality of hard disks into M block groups, and allocates one logical unit number LUN for each block group, when the first in the storage device When the hard disk fails, the faulty partition is determined to be the first partition, the second partition is obtained in the redundant capacity pool, and the LBA mapping table is established, and the first partition is reconstructed according to the LUN of the partition group. Data and store the data in a second block. In this embodiment, the storage device is expanded by utilizing the fragmented capacity of the hard disk. Therefore, maintenance personnel are not required to replace the faulty hard disk in the storage device, thereby effectively saving maintenance costs and hardware costs. Moreover, in this embodiment, the integer capacity of the hard disk is divided into blocks. The partitions of different hard disks are divided into a plurality of block groups to perform logical operations according to the LUNs of the block group, and the data in the fault block is reconstructed, and the blocks that have not failed in the faulty hard disk can still be used. Do not re-replace the failed hard disk, reduce the cost of the device, improve the utilization of the hard disk, and only reconstruct the fault block, which greatly reduces the reconstruction time.

FIG. 7 is a schematic structural diagram of a storage processing apparatus according to Embodiment 3 of the present invention. As shown in FIG. 7, the apparatus includes a determination module 21, an acquisition module 22, and a reconstruction module 23. The determining module 21 is configured to determine that the failed block is the first block when the first hard disk of the storage device fails. The obtaining module 22 is configured to obtain a second partition in the redundant capacity pool of the storage device; wherein the capacity of the second partition is not less than the capacity of the first partition, and the redundant capacity pool includes a fragmented capacity of the plurality of hard disks. The reconstruction module 23 is configured to reconstruct data in the first partition and store the data in the second partition.

The device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 3, and the implementation principle and technical effects are similar, and details are not described herein again.

FIG. 8 is a schematic structural diagram of a storage processing apparatus according to Embodiment 4 of the present invention. As shown in FIG. 8, the apparatus further includes a dividing module 24, and the dividing module 24 is further configured to divide the integer capacity of the plurality of hard disks into blocks. It is M block groups, and each logical block group is assigned a logical unit number LUN; where M is a positive integer and M ≤ N.

In this embodiment, the obtaining module 22 is further configured to establish a logical block address LBA mapping table. The LBA mapping table is used to store a mapping relationship between the LBA of the first partition and the LBA of the second partition. The reconstruction module 23 is further configured to reconstruct data in the first partition according to the LUN of the block group.

The device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 6. The implementation principle and technical effects are similar, and details are not described herein again.

FIG. 9 is a schematic structural diagram of a storage device according to Embodiment 5 of the present invention. As shown in FIG. 9, the storage device 31 includes a disk array controller (not shown) and a disk array 32, and the disk array 32 includes a plurality of hard disks 33. The disk array controller is configured to determine that the failed block is the first block when the first hard disk in the disk array 32 fails; the disk array controller is configured to obtain the second block in the redundant capacity pool of the storage device 31. ;among them, The capacity of the second partition is not less than the capacity of the first partition, and the redundant capacity pool includes the scattered capacity of the plurality of hard disks; the disk array controller is configured to reconstruct the data in the first partition and store the data in the second branch In the block.

It should be noted that, in this embodiment, the disk array controller may be located inside the storage device, or the disk array controller may be located outside the storage device, which is not limited in the present invention.

Further, in the fifth embodiment, the disk array controller is further configured to establish a logical block address LBA mapping table, where the LBA mapping table is used to store between the LBA of the first partition and the LBA of the second partition. Mapping relations. The disk array controller is further configured to divide all the blocks of the integer capacity of the plurality of hard disks 33 into M block groups, and assign a logical unit number LUN to each of the block groups; wherein M is a positive integer, and M ≤ N. The disk array controller is further configured to reconstruct data in the first block according to the LUN of the block group.

One of ordinary skill in the art will appreciate that all or part of the steps to implement the various method embodiments described above may be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are merely illustrative of 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, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A storage processing method is applied to a storage device, wherein the storage device includes a plurality of hard disks, the plurality of hard disks are fixed inside the storage device, and the hard disks include an integer capacity and a scattered capacity, and each hard disk The integer capacity includes N blocks, where N is a positive integer, and the method includes:

When the first hard disk of the plurality of hard disks fails, determining that the failed block is the first block;

Acquiring a second partition in the redundant capacity pool of the storage device; wherein, the capacity of the second partition is not less than the capacity of the first partition, and the redundant capacity pool includes the multiple hard disks Scattered capacity;

Reconstructing data in the first partition and storing the data in the second partition.
The method according to claim 1, wherein after the obtaining the second partition in the redundant capacity pool of the storage device, the method further comprises:

Establishing a logical block address LBA mapping table; wherein the LBA mapping table is configured to store a mapping relationship between the LBA of the first partition and the LBA of the second partition.
The method according to claim 1 or 2, wherein, when the first hard disk of the plurality of hard disks fails, before the determining that the failed block is the first block, the method further includes :

All the blocks of the integer capacity of the plurality of hard disks are divided into M block groups; wherein M is a positive integer and M≤N.

Allocating a logical unit number LUN for each of the block groups;
The method according to claim 3, wherein the reconstructing the data in the first block comprises:

Reconstructing data in the first partition according to the LUN of the block group.
A storage processing device, comprising:

a determining module, configured to determine, when a first one of the plurality of hard disks fails, to determine that the failed block is the first block;

An obtaining module, configured to obtain a second partition in a redundant capacity pool of the storage device; wherein The capacity of the second block is not less than the capacity of the first block, and the redundant capacity pool includes a fragmented capacity of the plurality of hard disks;

And a reconstruction module, configured to reconstruct data in the first partition and store the data in the second partition.
The apparatus according to claim 5, wherein the obtaining module is further configured to establish a logical block address LBA mapping table, wherein the LBA mapping table is configured to store the LBA of the first partition and the The mapping relationship between the LBAs of the second partition.
The device according to claim 5 or 6, wherein the device further comprises a dividing module, configured to divide all the blocks of the integer capacity of the plurality of hard disks into M block groups, and for each Each of the block groups is assigned a logical unit number LUN; wherein M is a positive integer and M≤N.
The apparatus according to claim 7, wherein the reconstruction module is further configured to reconstruct data in the first partition according to the LUN of the block group.
A storage device, comprising: a disk array controller and a disk array, wherein the disk array includes a plurality of hard disks; and the disk array controller is configured to:

When the first hard disk in the disk array fails, determining that the failed block is the first block; acquiring the second block in the redundant capacity pool of the storage device; wherein the second segment The capacity of the block is not less than the capacity of the first block, and the redundant capacity pool includes a fragmented capacity of the plurality of hard disks;

Reconstructing data in the first partition and storing the data in the second partition.
The storage device according to claim 9, wherein the disk array controller is further configured to establish a logical block address LBA mapping table; wherein the LBA mapping table is configured to store the LBA of the first block A mapping relationship with the LBA of the second partition.
The storage device according to claim 9 or 10, wherein the disk array controller is further configured to divide all the blocks of the integer capacity of the plurality of hard disks into M block groups, and for each Each of the block groups is assigned a logical unit number LUN; wherein M is a positive integer and M≤N.
The storage device according to claim 11, wherein the disk array controller is further configured to reconstruct data in the first segment according to the LUN of the block group.