CN109814810A - The processing method and processing device of hard disk failure sector in a kind of RAID array - Google Patents
The processing method and processing device of hard disk failure sector in a kind of RAID array Download PDFInfo
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Abstract
The present invention is for problems of the prior art, innovation proposes a kind of processing method and processing device of hard disk failure sector in RAID array, VD technology and section capacity-enlargement technology are used for solve the problems, such as to have damage sector on existing physical hard disk, the problem of shielding damage sector seriously affects network storage equipment calculated performance in existing solution is effectively evaded, and introduce faulty physical section, it can extend to the physical space around band, this part physical space can be shielded, it avoids subsequent being accessed to again, the loss for being accessed and causing the diffusion of damage around damage sector is thus effectively relieved, prolong the service life.
Description
Technical field
The present invention relates to hard-disc storage fields, more particularly, to a kind of processing method of hard disk failure sector in RAID array
And device.
Background technique
In current business use environment, majority can all select multiple hard disks forming RAID (Redundant
Arrays of Independent Drives, i.e. disk array) array may result in when hard disk is there are when failure sector
Hard disk is not available, and hard disk goes offline, and RAID array becomes degrading state, it is necessary to restore RAID array again by replacing hard disk
For normal condition.When there are failure sectors to cause following influence to varying degrees for hard disk:
(1) loss of data risk: in current service environment, majority can select by multiple hard disks form RAID5 or
RAID6, RAID5 can be two with redundancy with one hard disk of redundancy, RAID6.When there are failure sectors for the one of hard disk of RAID5
And after being removed array, preceding yet another hard disk failure is completed rebuilding, will lead to loss of data.
(2) hard-disk capacity wastes problem: the redundancy properties of RAID array are realized by sacrificing hard-disk capacity, because needing
Space is wanted to store check block；In practice, RAID5 sacrifice a hard-disk capacity, RAID6 sacrifice two hard-disk capacities, this undoubtedly in
Cause the waste of hard-disk capacity.
(3) hard disk replacement there are the greater loss of performance and realizes complexity, is at present in practical applications generally each hard
Disk can permit a certain number of sector corruptions, and support is replaced bad track sector.However since hard disk uses for a long time, and
Portfolio increasingly increases, and the damage of hard disk is on the rise and increasingly concentrates, and according to the replacement of sector one by one, naturally there are property
The greater loss and realization complexity of energy.Such as there are the continuous bad tracks of 10M size in the hard disk, then to carry out replacing for 20480 times
It changes, replacement is directed to the use of fractionation and searching algorithm every time.This undoubtedly influences performance very much.Furthermore, it is understood that due to
There are physical bad tracks in certain block place of hard disk, and over time, the periphery physical region that can multiply this hard disk also breaks down, then this block
Hard disk can also be kicked out of by RAID soon, and undoubtedly the service life of hard disk does not also extend.
Summary of the invention
In order to solve the problems in the existing technology, innovation proposes hard disk failure fan in a kind of RAID array to the present invention
The processing method and processing device in area, by VD (virtual disk, i.e. the virtual disk software of computer) technology and section capacity-enlargement technology
For damaging sector to solve the problems, such as to exist on existing physical hard disk, effectively evades and shielded damage in existing solution
Sector seriously affects the problem of network storage equipment calculated performance.
First aspect present invention provides a kind of processing method of hard disk failure sector in RAID array, comprising:
At least one VD is created using at least one physical segment of RAID array, and updates space reflection table；
The data of VD are written according to the mapping relations saved in space reflection table at least one band of RAID array,
When a failure occurs it, fault-signal is returned；
Storage control determines the band of presently written data when receiving fault-signal, and according to preset storage
Space size selectes a faulty physical section, and returns to the information of faulty physical section；
Storage control, which receives, to be selected one from RAID array residual memory space after the information of faulty physical section and replaces
Physical segment replacement faulty physical section is changed, and updates the mapping relations in space reflection table.
With reference to first aspect, in a first possible implementation of that first aspect, the packet of the faulty physical section
Include the size in faulty physical section space.
With reference to first aspect, in a second possible implementation of that first aspect, the space of the faulty physical section is big
In the space of hard disk bad sector, and it is less than or equal to the space of hard disk bad sector band place physical segment.
With reference to first aspect, in first aspect in the third possible implementation, the storage control receives event
A replacement physical segment replacement faulty physical section is selected from RAID array residual memory space after hindering the information of physical segment, and more
Mapping relations in new space reflection table are specifically:
Storage control receives the information in faulty physical section space, whether judges RAID array current residual storage space
Greater than faulty physical section space；
If RAID array current residual storage space is greater than faulty physical section space, from the residue storage of RAID array
A replacement physical segment is selected in space, and updates the mapping relations in space reflection table；
If RAID array current residual storage space is not more than faulty physical section space, miscue is returned.
With reference to first aspect, in the 4th kind of possible implementation of first aspect, the space of the replacement physical segment is big
In or equal to faulty physical section space.
With reference to first aspect, in the 5th kind of possible implementation of first aspect, in the update space reflection table
Mapping relations are specifically:
Selected faulty physical section is removed from VD, and space reflection table is updated, failure will be mapped to originally
The VD virtual hard disk space of physical segment physical space is remapped to replacement physical segment and corresponds in the physical space of size；
After the update of space reflection table, by current data according to mapping relations in updated space reflection table by data weight
In the band for newly writing replacement physical segment.
Second aspect of the present invention provides a kind of processing unit of hard disk failure sector in RAID array, comprising:
Creating unit creates at least one VD using at least one physical segment of RAID array, and updates space reflection table；
According to the mapping relations saved in space reflection table RAID array is written extremely in the data of VD by data write unit
In a few band, when a failure occurs it, fault-signal is returned to；
Fault processing unit, storage control determines the band of presently written data when receiving fault-signal, and presses
A faulty physical section is selected according to preset storage size, and returns to the information of faulty physical section；
Dilatation unit, storage control receive stored from RAID array residue after the information of the faulty physical section of transmitting it is empty
Between in select replacement physical segment replacement faulty physical section, and update the mapping relations in space reflection table.
In conjunction with second aspect, in second aspect in the first possible implementation, the dilatation unit is specifically included:
Judgment module, storage control receive the information in the faulty physical section space of transmitting, judge that RAID array is current
Whether residual memory space is greater than faulty physical section space；
Selected replacement module, if RAID array current residual storage space is greater than faulty physical section space, from RAID gusts
A replacement physical segment is selected in the residual memory space of column, and updates the mapping relations in space reflection table；
Miscue module returns if RAID array current residual storage space is not more than faulty physical section space
Miscue.
In conjunction with second aspect, in second of second aspect possible implementation, the selected replacement module is specifically wrapped
It includes:
Submodule is updated, selected faulty physical section is removed from VD, and space reflection table is updated, it will be original
The VD virtual hard disk space for being mapped to faulty physical section physical space is remapped to the physics sky that replacement physical segment corresponds to size
Between on；
Rewriting data enters submodule, after the update of space reflection table, by current data according to updated space reflection table
Data are re-written in the band of replacement physical segment by middle mapping relations.
The technical solution adopted by the present invention includes following technical effect:
VD technology and section capacity-enlargement technology are used for solve to have damage on existing physical hard disk in technical solution of the present invention
The problem of bad sector, effectively having evaded in existing solution shielding damage sector, to seriously affect network storage equipment computational
The problem of energy.
Faulty physical section is introduced in technical solution of the present invention, can extend to the physical space around band, this portion
Point physical space can be shielded, avoid it is subsequent be accessed to again, be thus effectively relieved around damage sector be accessed and
The loss for leading to the diffusion of damage, prolongs the service life.
It is unsuccessful when with the presence of hard disk failure sector, writing IO in technical solution of the present invention, this IO is split, is issued to respectively
Hard disk is write, bad sector is navigated to, this bad sector is mapped on replacement physical segment later, this failure sector is arrived in read-write when next time
When, the problem of directly will being written and read from replacement physical segment, avoid data in magnetic disk waste of capacity.
Storage control needs to remove selected faulty physical section from VD in technical solution of the present invention, to space reflection
Table is updated, and the VD virtual hard disk space for being mapped to faulty physical section physical space originally is remapped to replacement physical segment
In the physical space of corresponding size, avoid in a hard disk there are failure sector and after being removed array, before rebuilding and completing
Other hard disk failures will lead to the risk problem of loss of data.
General description and following detailed description more than it should be understood that be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
Illustrate the embodiment of the present invention or technical solution in the prior art to become apparent from, it below will be to embodiment or existing
Attached drawing needed in technical description is briefly described, it is clear that, for those of ordinary skills,
Under the premise of not making the creative labor, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is that the process of the processing method of hard disk failure sector in a kind of RAID array of embodiment one in the present invention program is shown
It is intended to；
Fig. 2 is to store control in the present invention program in a kind of RAID array of embodiment one in the processing method of hard disk failure sector
Device processed realizes the schematic diagram replaced to faulty physical section；
Fig. 3 is that the process of the processing method of hard disk failure sector in a kind of RAID array of embodiment two in the present invention program is shown
It is intended to；
Fig. 4 is that the process of the processing method of hard disk failure sector in a kind of RAID array of embodiment three in the present invention program is shown
It is intended to；
Fig. 5 is that the structure of the processing unit of hard disk failure sector in a kind of RAID array of example IV in the present invention program is shown
It is intended to；
Fig. 6 is that the structure of the processing unit of hard disk failure sector in a kind of RAID array of embodiment five in the present invention program is shown
It is intended to；
Fig. 7 is that the structure of the processing unit of hard disk failure sector in a kind of RAID array of embodiment six in the present invention program is shown
It is intended to.
Specific embodiment
In order to clarify the technical characteristics of the invention, below by specific embodiment, and its attached drawing is combined, to this hair
It is bright to be described in detail.Following disclosure provides many different embodiments or example is used to realize different knots of the invention
Structure.In order to simplify disclosure of the invention, hereinafter the component of specific examples and setting are described.In addition, the present invention can be with
Repeat reference numerals and/or letter in different examples.This repetition is that for purposes of simplicity and clarity, itself is not indicated
Relationship between various embodiments and/or setting is discussed.It should be noted that illustrated component is not necessarily to scale in the accompanying drawings
It draws.Present invention omits the descriptions to known assemblies and treatment technology and process to avoid the present invention is unnecessarily limiting.
Embodiment one
As shown in Figure 1, in a kind of RAID array hard disk failure sector processing method, comprising:
S1 creates at least one VD using at least one physical segment of RAID array, and updates space reflection table；
At least one band of RAID array is written according to the mapping relations saved in space reflection table by S2 for the data of VD
In, when a failure occurs it, return to fault-signal；
S3, storage control determines the band of presently written data when receiving fault-signal, and deposits according to preset
It stores up space size and selectes a faulty physical section, and return to the information of faulty physical section；
S4, storage control select one after receiving the information of faulty physical section from RAID array residual memory space
It replaces physical segment and replaces faulty physical section, and update the mapping relations in space reflection table.
In step sl, the mapping saved in space reflection table between the Virtual Space of VD and the physical space of physical segment is closed
System.
In step s 2, VD technology has had the application of certain scale in field of storage.VD can support two or more
Discontinuous free physical section is logically combined into continuous virtual hard disk space.Therefore the Virtual Space of VD can both map
To a continuous physical space, multiple discrete physical spaces can also be integrated by mapping, thus can solve RAID
The fragment problems generated when physical hard disk distributes in array, improve the utilization rate of physical hard disk.When the Virtual Space of upper layer VD needs
When wanting dilatation, several physical segments can be added again, existing VD is added, VD can support tens even more physical segments at present.
VD is exactly that it can see hard disk for the business of user.The hard disk that user or user application are seen is empty
Between be in fact Virtual Space.Therefore dilatation unit need to establish in space reflection table when create VD virtual hard disk space and
These Virtual Spaces are accordingly mapped to physical space up by physical space mapping relations, that is, distribute to one of the VD
Or the physical space of multiple physical segments.
For the application program of user or user, business datum is written in VD, however actually VD is received
To the data physical space that needs further to write RAID array according to aforementioned mapping relations in.The physics of RAID array is empty
Between can be divided into multiple sections, and it (be many items in most cases that each section, which would generally include one or more band,
Band).The operating unit of RAID array is band, therefore data write-in is executed as unit of band.
In step s3, during writing band write error may occur for data, and storage control will receive at this time
The prompt of write error, meaning current band in this way, there are one or more to damage sector, without navigating to failure sector
Specific location, it is only necessary to know the faulty sector of current band.Storage control receives mentioning for write error at this time
After showing, a continuous physical space including the current band that sector corruption occurs can be selected according to scheduled strategy
It is set to faulty physical section, it should be noted that faulty physical section includes that hard disk bad sector, that is, faulty physical section space is bad greater than hard disk
The space of sector, and the space of faulty physical section is less than or equal to the space of hard disk bad sector band place physical segment.
After having selected faulty physical section, the information of faulty physical section can be returned into storage control.The information of faulty physical section
Size including faulty physical section space.
In step s 4, after storage control receives faulty physical segment information, it can first judge that RAID array currently remains
Whether remaining memory space is more than or equal to the faulty physical section, and if it is storage control can be deposited from the residue of RAID array
It stores up and selectes a replacement physical segment in space (being usually not yet assigned to the retaining space of other VD), the space for replacing physical segment is big
In or equal to the faulty physical section space；Otherwise miscue is returned to storage control or administrator.If selected
Replacement physical segment, the faulty physical section for needing to select at this time are removed from VD, that is to say, that when ensuring that user visits again VD,
It will not be mapped in the physical space of faulty physical section, therefore storage control needs to be updated space reflection table, it will
The VD virtual hard disk space for being originally mapped to faulty physical section physical space is remapped to the object that replacement physical segment corresponds to size
Reason is spatially.As previously described since replacement physical segment is not less than faulty physical section, the update of mapping relations not will receive shadow
It rings.After mapping relations update, storage control re-writes current data, and data write-in at this time is according to updated sky
Between mapping table write data into replacement physical segment band in, VD technology and section capacity-enlargement technology are used for solve existing physics
There are problems that damaging sector on hard disk, has effectively evaded in existing solution shielding damage sector and seriously affect network and deposited
The problem of storing up equipment calculated performance.
In step S3 and S4, technical solution of the present invention is in order to further illustrate storage control in step S3 and S4
How the replacement to faulty physical section realized.As illustrated in fig. 2, it is assumed that VD is original, only multiple hard disks are constituted from RAID array
Physical space in be assigned to a physical segment, since original segment finds there is sector corruption in data writing process, at this time
The original segment in left side is split as three sections, i.e., the first physical segment 201 before VD dilatation, centre is faulty physical section 203 and VD
The first physical segment 205 before dilatation, faulty physical section 203 include bad sector 2031, and the first physical segment 201 before VD dilatation is corresponding
The first physical segment 202 after to the VD dilatation on right side, after the second physical segment 205 before VD dilatation corresponds to the VD dilatation on right side
Second physical segment 206, faulty physical section 203 correspond to replacement physical segment 204.Technical solution of the present invention introduces faulty physical
Section, can extend to the physical space around band, this part physical space can be shielded, and avoid subsequent being accessed again
It arrives, the loss for being accessed and causing the diffusion of damage around damage sector is thus effectively relieved, prolongs the service life, and work as
With the presence of hard disk failure sector, it is unsuccessful to write IO, this IO is split, is issued to writes hard disk respectively, navigates to bad sector, later will
This bad sector is mapped on replacement physical segment, when next time, this failure sector was arrived in read-write, will directly be carried out from replacement physical segment
The problem of reading and writing, avoiding data in magnetic disk waste of capacity.
Embodiment two
As shown in figure 3, step S4 in the processing method of hard disk failure sector in a kind of RAID array of technical solution of the present invention
It specifically includes:
S41, storage control receive the information in faulty physical section space；
S42, judges whether RAID array current residual storage space is greater than faulty physical section space, if it is judged that being
Be then follow the steps S43, if it is judged that be it is no, then follow the steps S44；
S43 then selectes a replacement physical segment from the residual memory space of RAID array, and updates in space reflection table
Mapping relations；
S44 then returns to miscue.
Embodiment three
As shown in figure 4, step S43 in the processing method of hard disk failure sector in a kind of RAID array of technical solution of the present invention
The middle mapping relations updated in space reflection table specifically include:
Selected faulty physical section is removed from VD, and is updated to space reflection table by S431, will be mapped to originally
The VD virtual hard disk space of faulty physical section physical space is remapped to replacement physical segment and corresponds in the physical space of size；
S432 will according to mapping relations in updated space reflection table by current data after the update of space reflection table
Data are re-written in the band of replacement physical segment.
Example IV
As shown in figure 5, the present invention also provides a kind of processing units of hard disk failure sector in RAID array, comprising:
Creating unit 11 creates at least one VD using at least one physical segment of RAID array, and updates space reflection
Table；
According to the mapping relations saved in space reflection table RAID array is written in the data of VD by data write unit 12
In at least one band, when a failure occurs it, fault-signal is returned to；
Fault processing unit 13, storage control determine the band of presently written data when receiving fault-signal, and
A faulty physical section is selected according to preset storage size, and returns to the information of faulty physical section；
Dilatation unit 14, storage control store after receiving the information of the faulty physical section of transmitting from RAID array residue
A replacement physical segment is selected in space and replaces faulty physical section, and updates the mapping relations in space reflection table.
Embodiment five
As shown in fig. 6, dilatation list in the processing unit of hard disk failure sector in a kind of RAID array of technical solution of the present invention
Member 14 specifically includes:
Judgment module 141, storage control receive the information in the faulty physical section space of transmitting, judge that RAID array is worked as
Whether preceding residual memory space is greater than faulty physical section space；
Selected replacement module 142, if RAID array current residual storage space is greater than faulty physical section space, from RAID
A replacement physical segment is selected in the residual memory space of array, and updates the mapping relations in space reflection table；
Miscue module 143 is returned if RAID array current residual storage space is not more than faulty physical section space
Return miscue.
Embodiment six
It is replaced as shown in fig. 7, being selected in the processing unit of hard disk failure sector in a kind of RAID array of technical solution of the present invention
It is specifically included in mold changing block 142:
Submodule 1421 is updated, selected faulty physical section is removed from VD, and space reflection table is updated, it will
The VD virtual hard disk space for being originally mapped to faulty physical section physical space is remapped to the object that replacement physical segment corresponds to size
Reason is spatially；
Rewriting data enters submodule 1422, and after the update of space reflection table, current data is reflected according to updated space
Data are re-written in the band of replacement physical segment by mapping relations in firing table.
Dilatation unit needs to remove selected faulty physical section from VD in technical solution of the present invention, and dilatation unit is to sky
Between mapping table be updated, the VD virtual hard disk space for being mapped to faulty physical section physical space originally is remapped to replacement
Physical segment corresponds in the physical space of size, avoid in a hard disk there are failure sector and after being removed array, rebuilding
Other hard disk failures before completing, will lead to the risk problem of loss of data.
The processing method and processing device of hard disk failure sector in a kind of RAID array of the present invention, can be applied in storage equipment,
Storage equipment includes RAID array and storage control, the hardware configuration of storage control and it is computer seemingly, including CPU with
And the basic hardwares such as memory.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (9)
1. the processing method of hard disk failure sector in a kind of RAID array, characterized in that include:
At least one VD is created using at least one physical segment of RAID array, and updates space reflection table；
According to the mapping relations saved in space reflection table by least one band of the data write-in RAID array of VD, work as hair
When raw failure, fault-signal is returned；
Storage control determines the band of presently written data when receiving fault-signal, and according to preset memory space
Size selectes a faulty physical section, and returns to the information of faulty physical section；
Storage control selectes an alternative after receiving the information of faulty physical section from RAID array residual memory space
It manages section and replaces faulty physical section, and update the mapping relations in space reflection table.
2. the processing method of hard disk failure sector in RAID array according to claim 1, characterized in that the failure object
The information of reason section includes the size in faulty physical section space.
3. the processing method of hard disk failure sector in RAID array according to claim 1 or 2, characterized in that the event
The space for hindering physical segment is greater than the space of hard disk bad sector, and is less than or equal to physical segment where the hard disk bad sector band
Space.
4. the processing method of hard disk failure sector in RAID array according to claim 1, characterized in that the storage control
Device processed receives that a replacement physical segment replacement is selected from RAID array residual memory space after the information of faulty physical section is former
Hinder physical segment, and the mapping relations updated in space reflection table are specifically:
Storage control receives the information in faulty physical section space, judges whether RAID array current residual storage space is greater than
Faulty physical section space；
If RAID array current residual storage space is greater than faulty physical section space, from the residual memory space of RAID array
In select a replacement physical segment, and update the mapping relations in space reflection table；
If RAID array current residual storage space is not more than faulty physical section space, miscue is returned.
5. the processing method of hard disk failure sector in RAID array according to claim 1 or 4, characterized in that described to replace
The space for changing physical segment is greater than or equal to the space of faulty physical section.
6. the processing method of hard disk failure sector in RAID array according to claim 4, characterized in that the update is empty
Between mapping relations in mapping table be specifically:
Selected faulty physical section is removed from VD, and space reflection table is updated, faulty physical will be mapped to originally
The VD virtual hard disk space of section physical space is remapped to replacement physical segment and corresponds in the physical space of size；
After the update of space reflection table, current data is write data according to mapping relations in updated space reflection table again
Into the band of replacement physical segment.
7. the processing unit of hard disk failure sector in a kind of RAID array, characterized in that include:
Creating unit creates at least one VD using at least one physical segment of RAID array, and updates space reflection table；
The data of VD are written at least the one of RAID array according to the mapping relations saved in space reflection table by data write unit
In a band, when a failure occurs it, fault-signal is returned to；
Fault processing unit, storage control determine the band of presently written data when receiving fault-signal, and according to pre-
If storage size select a faulty physical section, and return to the information of faulty physical section；
Dilatation unit, storage control receive after the information of the faulty physical section of transmitting from RAID array residual memory space
A selected replacement physical segment replaces faulty physical section, and updates the mapping relations in space reflection table.
8. the processing unit of hard disk failure sector in RAID array according to claim 7, characterized in that the dilatation list
Member specifically includes:
Judgment module, storage control receive the information in the faulty physical section space of transmitting, judge RAID array current residual
Whether memory space is greater than faulty physical section space；
Selected replacement module, if RAID array current residual storage space is greater than faulty physical section space, from RAID array
A replacement physical segment is selected in residual memory space, and updates the mapping relations in space reflection table；
Miscue module returns to mistake if RAID array current residual storage space is not more than faulty physical section space
Prompt.
9. the processing unit of hard disk failure sector in RAID array according to claim 8, characterized in that described select is replaced
Mold changing block specifically includes:
Submodule is updated, selected faulty physical section is removed, and space reflection table is updated from VD, will be mapped originally
It is remapped to the VD virtual hard disk space of faulty physical section physical space in the physical space that replacement physical segment corresponds to size；
Rewriting data enters submodule, and after the update of space reflection table, current data is reflected according in updated space reflection table
Relationship is penetrated to be re-written to data in the band of replacement physical segment.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111367707A (en) * | 2020-05-27 | 2020-07-03 | 成都易我科技开发有限责任公司 | Bad disk access management method and system |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111367707A (en) * | 2020-05-27 | 2020-07-03 | 成都易我科技开发有限责任公司 | Bad disk access management method and system |
| CN111367707B (en) * | 2020-05-27 | 2020-09-11 | 成都易我科技开发有限责任公司 | Bad disk access management method and system |
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