CN112000591B - SSD scanning method capable of designating logical block address, SSD scanning device, SSD scanning computer equipment and storage medium - Google Patents
SSD scanning method capable of designating logical block address, SSD scanning device, SSD scanning computer equipment and storage medium Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004590 computer program Methods 0.000 claims description 16
- 238000012360 testing method Methods 0.000 abstract description 13
- 238000012423 maintenance Methods 0.000 abstract description 3
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- 238000010586 diagram Methods 0.000 description 7
- 239000008187 granular material Substances 0.000 description 5
- 230000006870 function Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000013519 translation Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
- G06F12/10—Address translation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
- G06F11/2205—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested
- G06F11/221—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested to test buses, lines or interfaces, e.g. stuck-at or open line faults
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
- G06F11/2273—Test methods
Abstract
The application relates to a SSD scanning method capable of designating a logical block address, a device, a computer device and a storage medium; wherein, the method comprises the following steps: reading command line parameters issued by a host end; judging whether the command line parameters are correct or not; if the data is correct, carrying out data scanning and reading on the SSD according to the command line parameters, wherein the set number of logical block addresses are scanned and read each time, and the set number is subtracted from the number of logical block addresses in the data to be scanned and read, so that the number of remaining logical block addresses is obtained; judging whether the number of the addresses of the remaining logic blocks is smaller than or equal to a set value; if yes, reading the number of the addresses of the remaining logic blocks until the reading is finished. According to the application, when the range of the logical block address which possibly has problems is known, the SSD scanning is performed in a mode of designating the logical block address range without performing a full-disk read-write test or scanning, so that repeated and unnecessary operations can be reduced, the test efficiency is improved, and the maintenance cost is reduced.
Description
Technical Field
The application relates to the technical field of solid state disk scanning, in particular to an SSD scanning method capable of designating a logical block address, an SSD scanning device, computer equipment and a storage medium.
Background
In recent years, with the development of SSD (Solid State Disk), numerous manufacturers invest a lot of manpower and effort to make SSD products, and the performance requirements for SSD are also higher and higher, so that a series of tests and verification are required to ensure the quality of the product. The physical blocks (blocks) of the flash memory granule can have some original factory bad blocks and subsequent newly added bad blocks due to granule characteristics, and the management of the bad blocks is particularly careful, otherwise serious quality problems such as machine blue screen can occur.
The LBA (Logical Block Address ) refers to mapping the physical Block of the flash memory granule to the address of the logical Block through FTL (Flash Translation Layer flash translation layer), after a series of tests, the SSD may have a problem with a part of Block, but not record the Block in the bad Block table, and the bad Block needs to be marked again by performing the read-write test of the whole disk, but because the whole read-write test process consumes a long time, affects the test efficiency, and therefore, the requirement cannot be satisfied.
Disclosure of Invention
The application aims to overcome the defects of the prior art and provide a SSD scanning method, a SSD scanning device, a SSD scanning computer device and a SSD storage medium capable of designating a logical block address.
In order to achieve the above purpose, the present application adopts the following technical scheme:
an SSD scanning method capable of designating a logical block address, comprising the steps of:
reading command line parameters issued by a host end;
judging whether the command line parameters are correct or not;
if the data is correct, carrying out data scanning and reading on the SSD according to the command line parameters, wherein the set number of logic block addresses are scanned and read each time, and the set number is subtracted from the number of logic block addresses in the data to be scanned and read, so that the number of residual logic block addresses is obtained;
judging whether the number of the addresses of the remaining logic blocks is smaller than or equal to a set value;
if not, returning to the execution step, if yes, carrying out data scanning and reading on the SSD according to the command line parameters, wherein the set number of logical block addresses are scanned and read each time, and the set number is subtracted from the number of logical block addresses in the data to be scanned and read, namely the number of remaining logical block addresses;
if yes, the number of the addresses of the remaining logical blocks is read until the reading is finished.
The further technical scheme is as follows: in the step of reading the command line parameters issued by the host side, the command line parameters include: read-lba, start-lba, and lba-count, where read-lba is a functional key representing the read logical block address; start-lba is the position of the starting logical block address; the lba-count is the number of logical block addresses that need to be read.
The further technical scheme is as follows: if the step is correct, the data scanning and reading are performed on the SSD according to the command line parameters, and the set number of logical block addresses is subtracted from the number of logical block addresses in the data to be scanned and read each time, that is, the number of remaining logical block addresses is obtained by subtracting the set number, and the full reading amount of each time is 128K, that is, the set number is 256.
The further technical scheme is as follows: in the step of determining whether the number of the remaining logical block addresses is equal to or less than a set value, the set value is 256.
A scan SSD device capable of designating logical block addresses, comprising: the device comprises a first reading unit, a first judging unit, a scanning reading unit, a second judging unit and a second reading unit;
the first reading unit is used for reading the command line parameters issued by the host end;
the first judging unit is used for judging whether the command line parameters are correct or not;
the scanning and reading unit is used for scanning and reading data of the SSD according to the command line parameters, wherein the set number of logical block addresses are scanned and read each time, and the set number is subtracted from the number of logical block addresses in data to be scanned and read, so that the number of remaining logical block addresses is obtained;
the second judging unit is used for judging whether the number of the addresses of the residual logic blocks is smaller than or equal to a set value;
the second reading unit is configured to read the number of addresses of the remaining logical blocks until the reading is completed.
The further technical scheme is as follows: in the first reading unit, the command line parameters include: read-lba, start-lba, and lba-count, where read-lba is a functional key representing the read logical block address; start-lba is the position of the starting logical block address; the lba-count is the number of logical block addresses that need to be read.
The further technical scheme is as follows: in the scanning and reading unit, the full reading amount of each reading is 128K, namely the set number is 256.
The further technical scheme is as follows: in the second judging unit, the set value is 256.
A computer device comprising a memory having a computer program stored thereon and a processor that when executing the computer program implements a method of scanning SSD that can designate logical block addresses as described above.
A storage medium storing a computer program comprising program instructions which when executed by a processor implement a method of scanning SSD designatable logical block addresses as described above.
Compared with the prior art, the application has the beneficial effects that: through the way of not needing to carry out the whole disk read-write test or the whole disk scanning when the interval range of the logic block address which possibly goes wrong is known, SSD scanning can be carried out by the way of appointing the logic block address interval, repeated and unnecessary operations can be reduced, thereby greatly improving the test efficiency, reducing the maintenance cost and better meeting the demands.
The application is further described below with reference to the drawings and specific embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an application schematic diagram of an SSD architecture;
FIG. 2 is a schematic diagram illustrating the application of the spatial distribution of flash memory particles;
FIG. 3 is a flowchart illustrating a method for scanning SSD capable of assigning logical block addresses according to an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating an application of a SSD scanning method capable of assigning logical block addresses according to an embodiment of the present application;
FIG. 5 is a schematic block diagram of an SSD scanning device with logical block addresses specified in an embodiment of the present application;
fig. 6 is a schematic block diagram of a computer device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1 to 6, wherein referring to the SSD architecture shown in fig. 1, the SSD hard disk mainly includes an SSD Controller (Controller), DRAM granules and flash memory granules; the SSD controller is a core component, and includes PCIE interfaces, multiprocessor Cores (CPUs), memory controllers, DRAM controllers, and the like, and HOST is connected with the SSD through the PCIE interfaces, and is a mainstream configuration of the current SSD due to high-speed transmission performance of PCIE and NVMe protocol.
Referring to the internal space distribution of Flash grains shown in fig. 2, an SSD hard disk is generally composed of a plurality of Flash grains, different capacities are collocated with different numbers of Flash grains, each Flash grain is internally composed of a block (block), each block can be divided into a plurality of pages, the read/write of Flash (Flash grain) is based on pages, the erase of Flash is based on blocks, the read/write operation of HOST on Flash is operated by logical addresses converted by FTL (Flash translation layer), the units of these logical addresses are 512 bytes, and the logical addresses are expressed by LBAs (logical block addresses), from 0 to the maximum LBA corresponding to the capacities of the SSD.
Referring to fig. 3 to 4, the present application discloses a method for scanning SSD capable of designating logical block addresses, comprising the steps of:
s1, reading command line parameters issued by a host end;
wherein, in step S1, the command line parameters include: read-lba, start-lba, and lba-count, where read-lba is a functional key representing the read logical block address; start-lba is the position of the starting logical block address; the lba-count is the number of logical block addresses that need to be read.
S2, judging whether the command line parameters are correct; if not, ending.
S3, if the data is correct, carrying out data scanning and reading on the SSD according to the command line parameters, wherein each time of scanning and reading the set number of logic block addresses, the set number is subtracted from the number of logic block addresses in the data to be scanned and read, and the number of the logic block addresses is the number of the rest logic block addresses;
in step S3, the full reading amount of each reading is 128K, i.e., the set number is 256.
S4, judging whether the number of the addresses of the remaining logic blocks is smaller than or equal to a set value; if not, returning to the execution step S3', if the data is correct, carrying out data scanning and reading on the SSD according to the command line parameters, and subtracting the set number from the number of the logic block addresses in the data needing to be scanned and read by the set number each time to obtain the number of the residual logic block addresses;
in the step S4, the set value is 256.
S5, if yes, reading the number of the addresses of the remaining logic blocks until the reading is finished.
Referring to fig. 4, assuming that the largest LBA of the SSD is LBA N, common test software is to read or write from the full disk, from LBA 0 to LBA N, and the read operation of the present application is user-definable, and is selectable from LBA a to LBA B, because the full disk read takes a lot of time, and the test requirements cannot be satisfied under the severe test conditions.
According to the application, when the range of the logical block address which possibly has problems is known, the SSD scanning can be performed in a mode of designating the logical block address range without performing a full-disk read-write test or a full-disk scanning, so that repeated and unnecessary operations can be reduced, the test efficiency is greatly improved, the maintenance cost is reduced, and the requirements can be better met.
Referring to fig. 5, the present application also discloses a SSD scanning device capable of designating logical block addresses, comprising: a first reading unit 10, a first judging unit 20, a scanning reading unit 30, a second judging unit 40, and a second reading unit 50;
the first reading unit 10 is configured to read a command line parameter issued by a host;
the first judging unit 20 is configured to judge whether the command line parameter is correct;
the scanning and reading unit 30 is configured to scan and read data of the SSD according to the command line parameters, and each time the set number of logical block addresses is scanned and read, the set number is subtracted from the number of logical block addresses in the data to be scanned and read, so as to obtain the number of remaining logical block addresses;
the second judging unit 40 is configured to judge whether the number of addresses of the remaining logical blocks is less than or equal to a set value;
the second reading unit 50 is configured to read the number of addresses of the remaining logical blocks until the reading is completed.
Wherein, in the first reading unit 10, the command line parameters include: read-lba, start-lba, and lba-count, where read-lba is a functional key representing the read logical block address; start-lba is the position of the starting logical block address; the lba-count is the number of logical block addresses that need to be read.
In the scanning and reading unit 30, the full reading amount of each reading is 128K, that is, the set number is 256.
In the second determining unit 40, the set value is 256.
It should be noted that, as those skilled in the art can clearly understand, the specific implementation process of the above-mentioned SSD device and each unit capable of specifying the logical block address may refer to the corresponding description in the foregoing method embodiment, and for convenience and brevity of description, the description is omitted here.
The above-described logical block address-specifiable scan SSD arrangement can be implemented in the form of a computer program that can be run on a computer device as shown in fig. 6.
Referring to fig. 6, fig. 6 is a schematic block diagram of a computer device according to an embodiment of the present application; the computer device 500 may be a terminal or a server, where the terminal may be an electronic device with a communication function, such as a smart phone, a tablet computer, a notebook computer, a desktop computer, a personal digital assistant, and a wearable device. The server may be an independent server or a server cluster formed by a plurality of servers.
With reference to FIG. 6, the computer device 500 includes a processor 502, memory, and a network interface 505 connected by a system bus 501, where the memory may include a non-volatile storage medium 503 and an internal memory 504.
The non-volatile storage medium 503 may store an operating system 5031 and a computer program 5032. The computer program 5032 includes program instructions that, when executed, cause the processor 502 to perform a method of scanning SSD for logical block addresses.
The processor 502 is used to provide computing and control capabilities to support the operation of the overall computer device 500.
The internal memory 504 provides an environment for the execution of a computer program 5032 in the non-volatile storage medium 503, which computer program 5032, when executed by the processor 502, causes the processor 502 to perform a method for scanning SSD for logical block addresses.
The network interface 505 is used for network communication with other devices. It will be appreciated by those skilled in the art that the architecture shown in fig. 6 is merely a block diagram of some of the architecture relevant to the present inventive arrangements and is not limiting of the computer device 500 to which the present inventive arrangements may be implemented, as a particular computer device 500 may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components.
It should be appreciated that in an embodiment of the application, the processor 502 may be a central processing unit (Central Processing Unit, CPU), the processor 502 may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSPs), application specific integrated circuits (Application Specific Integrated Circuit, ASICs), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. Wherein the general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
Those skilled in the art will appreciate that all or part of the flow in a method embodying the above described embodiments may be accomplished by computer programs instructing the relevant hardware. The computer program comprises program instructions, and the computer program can be stored in a storage medium, which is a computer readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the flow steps of the embodiments of the method described above.
Accordingly, the present application also provides a storage medium. The storage medium may be a computer readable storage medium. The storage medium stores a computer program, wherein the computer program comprises program instructions which, when executed by a processor, implement the above-described SSD scanning method that can designate logical block addresses.
The storage medium may be a U-disk, a removable hard disk, a Read-Only Memory (ROM), a magnetic disk, or an optical disk, or other various computer-readable storage media that can store program codes.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be embodied in electronic hardware, in computer software, or in a combination of the two, and that the elements and steps of the examples have been generally described in terms of function in the foregoing description to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of each unit is only one logic function division, and there may be another division manner in actual implementation. For example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed.
The steps in the method of the embodiment of the application can be sequentially adjusted, combined and deleted according to actual needs. The units in the device of the embodiment of the application can be combined, divided and deleted according to actual needs. In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The integrated unit may be stored in a storage medium if implemented in the form of a software functional unit and sold or used as a stand-alone product. Based on such understanding, the technical solution of the present application is essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a terminal, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application.
The foregoing examples are provided to further illustrate the technical contents of the present application for the convenience of the reader, but are not intended to limit the embodiments of the present application thereto, and any technical extension or re-creation according to the present application is protected by the present application. The protection scope of the application is subject to the claims.
Claims (10)
1. A method for scanning SSD, capable of assigning logical block addresses, comprising the steps of:
reading command line parameters issued by a host end;
judging whether the command line parameters are correct or not;
if the command line parameters are correct, carrying out data scanning and reading on the SSD according to the command line parameters, wherein each time of scanning and reading the set number of logic block addresses, the set number is subtracted from the number of logic block addresses in the data to be scanned and read, and the number of the residual logic block addresses is obtained;
judging whether the number of the addresses of the remaining logic blocks is smaller than or equal to a set value;
if the number of the remaining logical block addresses is greater than the set value, returning to the execution step, if the command line parameters are correct, performing data scanning and reading on the SSD according to the command line parameters, wherein the set number of logical block addresses are scanned and read each time, and the set number is subtracted from the number of the logical block addresses in the data to be scanned and read, namely the number of the remaining logical block addresses;
if the number of the remaining logical block addresses is smaller than or equal to the set value, the number of the remaining logical block addresses is read until the reading is finished.
2. The method of claim 1, wherein the step of reading command line parameters issued by the host side includes: read-lba, start-lba, and lba-count, where read-lba is a functional key representing the read logical block address; start-lba is the position of the starting logical block address; the lba-count is the number of logical block addresses that need to be read.
3. The method according to claim 1, wherein the step of "if the command line parameters are correct, performing data scanning and reading on the SSD according to the command line parameters, wherein each scanning and reading the set number of logical block addresses, subtracting the set number from the number of logical block addresses in the data to be scanned and read, namely the number of remaining logical block addresses", wherein the full reading amount of each reading is 128K, namely the set number is 256.
4. The method according to claim 1, wherein the step of determining whether the number of remaining logical block addresses is equal to or less than a set value is 256.
5. A scan SSD device capable of assigning logical block addresses, comprising: the device comprises a first reading unit, a first judging unit, a scanning reading unit, a second judging unit, a returning unit and a second reading unit;
the first reading unit is used for reading the command line parameters issued by the host end;
the first judging unit is used for judging whether the command line parameters are correct or not;
the scanning and reading unit is used for scanning and reading data of the SSD according to the command line parameters if the command line parameters are correct, and subtracting the set number from the number of the logical block addresses in the data to be scanned and read, namely the number of the remaining logical block addresses, wherein the set number of the logical block addresses is read in each scanning;
the second judging unit is used for judging whether the number of the addresses of the residual logic blocks is smaller than or equal to a set value;
the return unit is used for returning to execute the data scanning and reading of the SSD according to the command line parameters if the number of the remaining logical block addresses is larger than the set value, wherein the number of the logical block addresses in the data to be scanned and read is subtracted by the set number, and the number of the remaining logical block addresses is the number of the remaining logical block addresses;
and the second reading unit is used for reading the number of the residual logic block addresses until the reading is finished if the number of the residual logic block addresses is smaller than or equal to a set value.
6. The SSD scanning device of claim 5, wherein the command line parameters in the first read unit include: read-lba, start-lba, and lba-count, where read-lba is a functional key representing the read logical block address; start-lba is the position of the starting logical block address; the lba-count is the number of logical block addresses that need to be read.
7. The device for scanning SSD with assigned logical block addresses as recited in claim 5, wherein the number of full reads per read in said scanning/reading unit is 128K, i.e., 256.
8. The apparatus for scanning SSD as recited in claim 5, wherein said second determining unit sets 256.
9. A computer device comprising a memory and a processor, the memory having stored thereon a computer program, the processor implementing the method of scanning SSD of specifiable logical block addresses as claimed in any one of claims 1-4 when the computer program is executed.
10. A storage medium storing a computer program comprising program instructions which, when executed by a processor, implement the method of scanning SSD of specifiable logical block addresses of any one of claims 1-4.
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