CN101699389A - Method and device for processing hot removal of magnetic disk - Google Patents
Method and device for processing hot removal of magnetic disk Download PDFInfo
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Abstract
The invention discloses a method and a device for processing hot removal of a magnetic disk. The method is used in a magnetic disk array of a multi-controller, and when a magnetic disk is removed from the array in a reading-writing state, the hot removal of the magnetic disk is processed. The method comprises the following step that: after a logic equipment drive layer receives a magnetic disk failure report, and under conditions that the magnetic disk failure report is confirmed to come from a main controller and the current logic equipment is in a reconfiguring state, judging whether the current logic equipment is at a level of redundant arrays of inexpensive magnetic disks RAID; if so, setting the magnetic disk group member corresponding to the currently removed magnetic disk in a failure state, and continuing the reconfiguring operation; and otherwise, setting all logic equipment of the magnetic disk group member to which the currently removed magnetic disk belongs in a failure state, stopping the reconfiguring operation, and sending the state information of the current logic equipment to an opposite terminal controller. According to the device, the restoring ability and the flexibility of the magnetic disk array system on an accident can be improved.
Description
Technical field
The present invention relates to field of computer technology, relate in particular to the disposal route and the device of a kind of hot removal of magnetic disk in the disk array of multi-controller.
Background technology
Disk array (Disk Array) is controlled interconnecting of a plurality of hard disks by hard disk controller, makes the read-write of a plurality of hard disks synchronous, reduces mistake, increases the technology of efficient and fiduciary level.Wherein, control the disk array of a plurality of disks, be called double control disk array by two controllers.Usually, disk array is meant Redundant Arrays of Inexpensive Disks (Redundant Arrayof Inexpensive Disks abbreviates RAID as), wherein, RAID is the theoretical standard that disk array is realized technically, performance and fiduciary level that its purpose is to reduce mistake, improves storage system.Particularly, RAID be a kind of with polylith independently hard disk (physical hard disk) combine by different modes and form a hard disk groups (logic hard disk), thereby provide than the higher memory property of single hard disk and the data backup technology be provided.The different modes of forming disk array has determined RAID rank (RAID Levels).0,1,0+1,2,3,4,5,6 and 7 at present, the rank of RAID comprises:, wherein, the RAID0 rank is a nonredundancy RAID rank.
For hard disk, because its data line and power lead separate, so allow the user to pull out or change the damage hard disk under shutdown system not, the situation of not cutting off the electricity supply, this process is called hot removal of magnetic disk.Support that hot removal is one of basic function of disk array.In double control disk array, be in the just array under read-write state, pull out a disk after, trigger hardware associated drives and two control associated drives, and notify the logical device Drive Layer disk failure.Meanwhile, the logical device of reading and writing sends disk failure report because of can not find physical disk, and therefore, the logical device Drive Layer will receive three incidents simultaneously: the notification event of two controllers and the read-write incident of makeing mistakes.
In existing technology, because only provided technology how to find hot removal of magnetic disk, and the technology that a series of incidents that the hot removal disk do not caused and state carry out logical process, thereby, make system to the timely recovery capability of disaster a little less than, lack extendability and dirigibility.
Summary of the invention
In view of this, the invention provides a kind of disposal route and device of hot removal of magnetic disk, in order to solve prior art behind hot removal of magnetic disk owing to caused incident of hot removal disk and state are not carried out logical process, and cause system's problem more weak to the timely recovery capability of disaster.
According to an aspect of the present invention, provide a kind of disposal route of hot removal of magnetic disk, this method is used for the disk array at multi-controller, when just being in after the array under the read-write state is pulled out a disk, the hot removal of magnetic disk incident is handled.
Disposal route according to hot removal of magnetic disk of the present invention comprises: after the logical device Drive Layer receives the disk failure report, come from master controller in definite disk failure report, and current logical device is under the situation of reconfiguration status, judge whether current logical device is redundant Redundant Arrays of Inexpensive Disks RAID rank, if, the then current disk groups member who is pulled out the disk correspondence is set to malfunction, and proceeds reconfiguration operation; Otherwise current all logical device that are pulled out disk place disk groups are set to malfunction, stop reconfiguration operation, and the status information of current logical device is sent to side controller.
According to another aspect of the present invention, provide a kind for the treatment of apparatus of hot removal of magnetic disk, this device is applied in the disk array of multi-controller.
Treating apparatus according to hot removal of magnetic disk of the present invention comprises: receiver module, first judge module, second judge module, the 3rd judge module, configuration module and sending module.Wherein, receiver module is used to receive the disk failure report; First judge module is used to judge whether the disk failure report comes from the master controller incident; Second judge module is used to judge whether current logical device handles reconfiguration status; The 3rd judge module is used to judge whether current logical device is redundant RAID rank; Configuration module, being used for that judged result at first judge module, second judge module and the 3rd judge module is is under the situation, the current disk groups member who is pulled out the disk correspondence is set to malfunction, carries out reconfiguration operation; The judged result of first judge module and second judge module for not, the judged result of the 3rd judge module for situation not under, current all logical device that are pulled out disk place disk groups are set to malfunction, stop reconfiguration operation; Sending module is used for the status information of current logical device is sent to side controller.
By above-mentioned at least one scheme of the present invention,, can improve the timely recovery capability of disk system, and strengthen its extendability and dirigibility disaster by caused a series of incidents of hot removal disk and state are carried out logical process.
Other features and advantages of the present invention will be set forth in the following description, and, partly from instructions, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the instructions of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of instructions, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation of disk array controller;
Fig. 2 is the structural representation that logical device drives;
Fig. 3 is the process flow diagram of disposal route of the hot removal of magnetic disk of the embodiment of the invention;
Fig. 4 is the structural representation according to the treating apparatus of the hot removal of the embodiment of the invention;
Fig. 5 is the structural representation of the treating apparatus of hot removal according to the preferred embodiment of the invention;
Fig. 6 is the structural representation of the treating apparatus of the hot removal of another preferred embodiment according to the present invention;
Fig. 7 is a process flow diagram of realizing the processing of hot removal of magnetic disk in the double control disk array according to the embodiment of the invention.
Embodiment
Functional overview
In multi-controller, after same disk was pulled out, each controller all can detect disk and be pulled out, and all notifies the logical device layer.So, when the disk array of reading and writing, extract a disk after, the logical device Drive Layer can receive the report of three kinds of disk failure.Repeatedly handle this three kinds of disk failure reports for fear of logical device, influence the result of logical device, the embodiment of the invention provides a kind of processing scheme of hot removal of magnetic disk, be used for disk array at multi-controller, when just being in after the array under the read-write state is pulled out a disk, the hot removal of magnetic disk incident is handled.In embodiments of the present invention, by member condition and the mutual exclusion lock mechanism that logical device is set, solve that logical device is repeatedly handled above-mentioned three kinds of disk failure report and the problem that influences the result of logical device.In embodiments of the present invention, at first, for a plurality of controllers, logical device receives only the disk failure report of master controller, for the inefficacy report from control, directly returns, wait master control to finish dealing with after, notice is from control, and synchronous regime.Enter in the mutual exclusion lock for the disk failure report first time in the master control, failed disk is changed to fault, and logical device is changed to the reconstruction state that needs.After the second time that causes by extracting same disk, the inefficacy report entered, judge that disk is the fault state or is rebuilding state, directly return.
Under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Before the technical scheme that the embodiment of the invention is provided describes,, earlier disk array controller and logical device driving are simply introduced for the ease of understanding.
Fig. 1 is the structural representation of disk array controller, as shown in Figure 1, disk array controller comprises hardware and software two parts, and the environment of hardware supported has the IOP342 processor, multinuclear such as X86, PPC multiloop loop system or multiprocessing node system are supported hardware accelerators such as DMA, XOR; The architecture of software is supported linux operating system, on the basis of linux kernel, realizes the data processing to disk array, and all processing all realize at kernel state.Software mainly comprises the hardware associated drives, two control associated drives, logical device driving and cache relevant treatment etc.
Fig. 2 is the structural representation that logical device drives, as shown in Figure 2, logical device drives and mainly is divided into the lower part: the processing of disk management, disk groups management and logical device, wherein, a plurality of disks in the array are formed disk groups, logical device is based upon on the disk, and disk groups is the logical device allocation space.
According to the embodiment of the invention, a kind of disposal route of hot removal of magnetic disk at first is provided, be used for disk array at multi-controller, when just being in after the array under the read-write state is pulled out a disk, the hot removal of magnetic disk incident is handled.
Fig. 3 is the process flow diagram of the disposal route of the hot removal of magnetic disk that provides of the embodiment of the invention, and as shown in Figure 3, in specific implementation process, after the logical device Drive Layer received the disk failure report, this method mainly may further comprise the steps:
In specific implementation process, determining that if current logical device is not in reconfiguration status, then said method can also may further comprise the steps when definite disk failure report is come autonomous controller:
Step 1 judges whether current logical device is redundant RAID rank, and if not, then all logical device of disk groups are set to malfunction, and process ends, otherwise, execution in step 2;
In specific implementation process, before process ends, the status information of current logical device can also be sent to side controller.
Step 2 increases mutual exclusion lock, judges whether disk groups is in normal condition, if the state of then revising disk groups is a malfunction, and the current disk groups member who is pulled out the disk correspondence is set to malfunction, increase the number of the failed disk of disk groups, execution in step 4; Otherwise, execution in step 3;
Step 3 is judged the state of failed disk in the disk groups, if to be disk normal or disk is being rebuild state for the state of failed disk, then execution in step 6; Otherwise, the failed disk number of increase disk groups, execution in step 4;
Step 4 judges whether the failed disk number of disk groups surpasses preset value, if all logical device on the disk groups are changed to malfunction, execution in step 6; Otherwise, execution in step 5;
Step 5 discharges mutual exclusion lock, with the status modifier of disk groups for treating the reconstruction state;
Step 6 discharges described mutual exclusion lock, process ends.
In specific implementation process, after carrying out above-mentioned steps 5, further in the inquiry system whether the HotSpare disk that can use is arranged, if, then HotSpare disk is joined disk groups, and the member of disk groups is set to rebuild state, disk groups is reshuffled; Otherwise, current logical device is changed to degraded running pattern, process ends.
And, disk groups is reshuffled finish after, above-mentioned disk groups can further be upgraded the configuration information of this disk groups, and with the state of this disk groups with and member's state send to side controller.
According to the embodiment of the invention, a kind for the treatment of apparatus of hot removal also is provided, this device is applied in the disk array of multi-controller.
Fig. 4 is the structural representation according to the treating apparatus of the hot removal of the embodiment of the invention, as shown in Figure 4, said apparatus comprises: receiver module 40, first judge module 41, second judge module 42, the 3rd judge module 43, configuration module 44 and sending module 45, wherein, receiver module 40 is used to receive the disk failure report; First judge module 41 is used to judge whether the disk failure report comes from the master controller incident; Second judge module 42 is used to judge whether current logical device handles reconfiguration status; The 3rd judge module 43 is used to judge whether current logical device is redundant RAID rank; Configuration module 44, being used for that judged result at first judge module 41, second judge module 42 and the 3rd judge module 43 is is under the situation, the current disk groups member who is pulled out the disk correspondence is set to malfunction, carries out reconfiguration operation; The judged result of first judge module 41 and second judge module 42 for not, the judged result of the 3rd judge module 43 for situation not under, current all logical device that are pulled out disk place disk groups are set to malfunction, stop reconfiguration operation; Sending module 45 is used for the status information of current logical device is sent to side controller.
Particularly, configuration module 44 can also be used for judged result at first judge module 41 be, the judged result of second judge module 42 and the 3rd judge module 43 is under the situation not, all logical device of disk groups are set to malfunction.
Particularly, Fig. 5 is the structural representation of the treating apparatus of hot removal according to the preferred embodiment of the invention, and as shown in Figure 5, said apparatus can further include: the 4th judge module 46, counter 47 and the 5th judge module 48, wherein,
The 4th judge module 46, be used for judged result at first judge module 41 and the 3rd judge module 43 and be, the judged result of second judge module 42 is under the situation not, judges whether disk groups is in normal condition; Above-mentioned configuration module 44 can also be used in the judged result of the 4th judge module 46 for being under the situation, be malfunction with the status modifier of disk groups, and the current disk groups member who is pulled out the disk correspondence is set to malfunction;
Counter 47 is used to calculate the number of the failed disk of disk groups, the judged result of the 4th judge module 46 for situation not under, increase the number of the failed disk of its calculating;
The 5th judge module 48 is used to judge whether the value of counter 47 surpasses preset value; Above-mentioned configuration module 44 also be used for the judged result of the 5th judge module 48 for situation not under, with the status modifier of disk groups for treating the reconstruction state.
Particularly, Fig. 6 is the structural representation of the treating apparatus of the hot removal of another preferred embodiment according to the present invention, as shown in Figure 6, said apparatus can also comprise: enquiry module 49, be used for configuration module 44 with the status modifier of disk groups for after treating the reconstruction state, whether the HotSpare disk that can use is arranged in the inquiry system; Above-mentioned configuration module 44 can also be used for HotSpare disk that enquiry module 49 is found and add disk groups, and the member of disk groups is set to rebuild state, and disk groups is reshuffled.
The specific implementation process of the technical scheme that the embodiment of the invention is provided below in conjunction with specific embodiment describes.
In the present embodiment, the logical device Drive Layer is divided into three layers: the disk management layer, disk groups administration and supervision authorities and logical device layer, wherein, disk management course disc array system imports disk and hyperdisk, and the disk groups administration and supervision authorities are formed a group with a plurality of disks, and disk groups carried out space management as a whole, the logical device layer is created on the disk groups, from the disk groups allocation space, realizes the data management of concrete RAID.In addition, the state of disk groups is defined as GOOD, FAIL, REBUILD_NEED and REBUILDING, represents respectively that disk groups is normal, the disk groups fault, treats the reconstruction state and rebuilding; Its member is defined as PD_OK, PD_FAIL, PD_REBUILDING, and the expression disk is normal, disk failure and disk are rebuild.
Fig. 7 is a process flow diagram of realizing the processing of hot removal of magnetic disk in the double control disk array in the present embodiment.As shown in Figure 7, the process of the hot removal disk being handled at present embodiment mainly may further comprise the steps:
Whether step 704, decision logic equipment are redundant RAID rank, if RAID1, RAID10, RAID3, RAID5, RAID6 rank determine that then this logical device is redundant RAID rank, enter step 705, otherwise, enter step 707;
Step 706 continues to carry out reconfiguration operation;
Step 707 is if RAID0 is changed to malfunction with current all logical device of being pulled out disk place disk groups;
Step 708 stops reconfiguration operation, the failure of report reconfiguration operation;
Step 709 to side controller, is finished dealing with the state notifying of current logical device behind the state information updating to side controller, sends to reply and finishes message, process ends;
Step 711 increases mutual exclusion lock;
Step 712 is judged the current normal condition that whether is in of disk groups, if be GOOD, then enters step 713, otherwise, if disk groups is FAIL, enter step 721;
Particularly, redundant RAID rank for different stage, the value difference of above-mentioned redundant maximum number, for example, if RAID1 member was lost efficacy number greater than n-1 (n is total member's number), RAID10 member lost efficacy number greater than n/2, RAID5 member lost efficacy number greater than 1, RAID6 member lost efficacy number greater than 2, think that then the disk number that lost efficacy on the disk groups surpasses redundant maximum number, then enter step 715, otherwise, think that the inefficacy number of disk groups less than redundant maximum number, then enters step 717.
Step 715 is changed to FAIL (being malfunction) with all logical device on the disk groups;
Step 716 discharges mutual exclusion lock, process ends;
Step 717 discharges mutual exclusion lock, and the state of disk is set to REBUILD_NEED, enters and rebuilds the preparatory stage;
Whether step 718 has HotSpare disk to use in the inquiry system, if having, then execution in step 719, otherwise, logical device is changed to the degraded running pattern, and process ends;
Step 722 if the redundant RAID rank of logical device is RAID0, is changed to FAIL state, process ends then with all logical device on the disk groups.
Above step has been finished all processes of the processing of hot removal of magnetic disk in the double control disk array.
In sum, the technique scheme that provides by the embodiment of the invention, configuration information and data synchronization between can the retentive control device, can also avoid the re-treatment and the assurance redundant array of disk array under degraded mode, to proceed read-write operation, thereby, the dirigibility, reliability and the security that have improved disc array system.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the disposal route of a hot removal of magnetic disk, be used for disk array at multi-controller, when being in just after the array under the read-write state is pulled out a disk, the hot removal of magnetic disk incident is handled, it is characterized in that, after the logical device Drive Layer received the disk failure report, described method comprised:
Determining that described disk failure report comes from master controller, and current logical device is under the situation of reconfiguration status, judge whether described current logical device is redundant RAID rank, if, the then current disk groups member who is pulled out the disk correspondence is set to malfunction, and proceeds reconfiguration operation; Otherwise,
Current all logical device that are pulled out disk place disk groups are set to malfunction, stop reconfiguration operation, and the status information of described current logical device is sent to side controller.
2. method according to claim 1 is characterized in that, when definite described disk failure report was come autonomous controller, if described current logical device is not in reconfiguration status, then described method also comprised:
Judge whether described current logical device is redundant RAID rank, and if not, then all logical device of described disk groups are set to malfunction, process ends.
3. method according to claim 2 is characterized in that, after all logical device of described disk groups were set to malfunction, described method also comprised:
The status information of described current logical device is sent to side controller.
4. method according to claim 2 is characterized in that, if described current logical device is redundant RAID rank, then described method also comprises:
Step 1 increases mutual exclusion lock, judges whether described disk groups is in normal condition, if the state of then revising described disk groups is a malfunction, and the current disk groups member who is pulled out the disk correspondence is set to malfunction, increase the number of the failed disk of described disk groups, execution in step 3; Otherwise, execution in step 2;
Step 2 is judged the state of failed disk in the described disk groups, if to be disk normal or disk is being rebuild state for the state of failed disk, then execution in step 5; Otherwise, increase the failed disk number of described disk groups, execution in step 3;
Step 3 judges whether the failed disk number of described disk groups surpasses preset value, if all logical device on the described disk groups are changed to malfunction, execution in step 5; Otherwise, execution in step 4;
Step 4 discharges described mutual exclusion lock, with the status modifier of described disk groups for treating the reconstruction state;
Step 5 discharges described mutual exclusion lock, process ends.
5. method according to claim 4 is characterized in that, with the status modifier of described disk groups for after treating the reconstruction state, described method also comprises:
Whether the HotSpare disk that can use is arranged in the inquiry system, if, then described HotSpare disk is joined described disk groups, and the member of described disk groups is set to rebuild state, described disk groups is reshuffled; Otherwise,
Described current logical device is changed to degraded running pattern, process ends.
6. method according to claim 5 is characterized in that, described disk groups is reshuffled finish after, described method also comprises:
Described disk groups is upgraded the configuration information of described disk groups, and sends to the member's of the state of described disk groups and described disk groups state described to side controller.
7. the treating apparatus of a hot removal of magnetic disk is applied in the disk array of multi-controller, it is characterized in that, described device comprises:
Receiver module is used to receive the disk failure report;
First judge module is used to judge whether described disk failure report comes from the master controller incident;
Second judge module is used to judge whether current logical device handles reconfiguration status;
The 3rd judge module is used to judge whether described current logical device is redundant RAID rank;
Configuration module, being used for that judged result at described first judge module, described second judge module and described the 3rd judge module is is under the situation, the current disk groups member who is pulled out the disk correspondence is set to malfunction, carries out reconfiguration operation; The judged result of described first judge module and described second judge module for not, the judged result of described the 3rd judge module for situation not under, current all logical device that are pulled out disk place disk groups are set to malfunction, stop reconfiguration operation;
Sending module is used for the status information of described current logical device is sent to side controller.
8. device according to claim 7 is characterized in that, described configuration module configuration module also is used for:
The judged result of described first judge module be, the judged result of described second judge module and described the 3rd judge module for situation not under, all logical device of described disk groups are set to malfunction.
9. device according to claim 7 is characterized in that, described device also comprises:
The 4th judge module, be used for judged result at described first judge module and described the 3rd judge module and be, the judged result of described second judge module is under the situation not, judges whether described disk groups is in normal condition;
Described configuration module also is used in the judged result of described the 4th judge module the 4th judge module for being under the situation, be malfunction with the status modifier of described disk groups, and the current disk groups member who is pulled out the disk correspondence is set to malfunction;
Counter is used to calculate the number of the failed disk of described disk groups, the judged result of described the 4th judge module the 4th judge module for situation not under, increase the number of the failed disk of its calculating;
The 5th judge module is used to judge whether the value of described rolling counters forward device surpasses preset value;
Described configuration module also be used for the judged result of described the 5th judge module the 5th judge module for situation not under, with the status modifier of described disk groups for treating the reconstruction state.
10. device according to claim 9 is characterized in that, described device also comprises:
Enquiry module, be used for described configuration module with the status modifier of described disk groups for after treating the reconstruction state, whether the HotSpare disk that can use is arranged in the inquiry system;
Described configuration module also is used for the HotSpare disk that described enquiry module finds is added described disk groups, and the member of described disk groups is set to rebuild state, and described disk groups is reshuffled.
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| CN104679447A (en) * | 2014-12-31 | 2015-06-03 | 曙光信息产业股份有限公司 | Disk control method and device |
| CN107301106A (en) * | 2017-06-28 | 2017-10-27 | 郑州云海信息技术有限公司 | The restoration methods and device of a kind of RAID system failure |
| CN108255410A (en) * | 2016-12-28 | 2018-07-06 | 华为技术有限公司 | A kind of method, apparatus and equipment for handling disk roam |
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| CN101887386A (en) * | 2010-06-02 | 2010-11-17 | 深圳市迪菲特科技股份有限公司 | Method and system for processing failure of redundant array of independent disk controller |
| CN104679447A (en) * | 2014-12-31 | 2015-06-03 | 曙光信息产业股份有限公司 | Disk control method and device |
| CN108255410A (en) * | 2016-12-28 | 2018-07-06 | 华为技术有限公司 | A kind of method, apparatus and equipment for handling disk roam |
| CN108255410B (en) * | 2016-12-28 | 2021-06-01 | 华为技术有限公司 | Method for processing disk roaming, RAID controller and equipment |
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| CN101699389B (en) | 2014-12-10 |
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