CN111694764A - Data reading method of failed solid state disk - Google Patents
Data reading method of failed solid state disk Download PDFInfo
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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
- G06F12/0223—User address space allocation, e.g. contiguous or non contiguous base addressing
- G06F12/023—Free address space management
- G06F12/0238—Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory
- G06F12/0246—Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory in block erasable memory, e.g. flash memory
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- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/14—Handling requests for interconnection or transfer
- G06F13/16—Handling requests for interconnection or transfer for access to memory bus
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Abstract
The invention discloses a data reading method of a failed solid state disk, which is characterized by comprising the following steps of: s100: connecting the solid state disk to the device; s200: whether the solid state disk is normal and ready is judged, if yes, step S300 is executed, otherwise, the process is ended; s300: acquiring first basic information; s400: acquiring basic parameters; s500: whether the microcode of the solid state disk can be uploaded or not, if so, executing the step S600, otherwise, executing the step S700; s600: uploading a microcode of the solid state disk, acquiring an unlocking mark, and executing the step S800; s700: checking the first basic information, judging whether the checking is passed, if so, executing the step S800, otherwise, ending the process; s800: whether the data of the solid state disk is read by adopting an internal decoding mode is judged, if so, the step S900 is executed, otherwise, the step SA00 is executed; s900: addressing the physical address of the current sector by adopting internal decoding and reading data, and executing step SC 00; SA 00: creating a decoding table file; SB 00: the physical address of the current sector is addressed and the data is read.
Description
Technical Field
The invention belongs to the field of information security technology and data recovery, relates to a method for accessing a failed solid state disk, and particularly relates to a data reading method for the failed solid state disk.
Background
In the fields of information security technology and data recovery, the capacity of hard disks is increasing and the usage of hard disks is expanding. Meanwhile, the shipment volume of hard disk drives HDD type hard disks is continuously reduced, and the shipment volume of solid state drives SSD is continuously increased. Since 2010, the Solid State Disk (SSD) shipment starts to increase rapidly, and the increase rate is kept more than 10% for nine consecutive years: the increase rate in 2015 is 30.4%, and the increase rate in 2018 Solid State Disk (SSD) output volume is 37.2%; in 2020, the Solid State Disk (SSD) shipment is expected to increase to more than 2 hundred million pieces.
The solid state disk SSD is widely used because of its high read/write speed. With the continuous increase of the Solid State Disk (SSD) shipment volume, more and more problems appear. The failure is affected not only by the number of writes, but also by other conditions. For example, even when the solid state disk SSD is not powered on, data is slowly lost over time; in addition, for every 5 ℃ rise in temperature, the time for which data can be stored is reduced by half. Recently, some published security reports have indicated that some of the solid state drives used by servers and storage products are defective, data is lost on the drives after about 32746 hours of power up, and the data is unrecoverable, which also has very serious consequences.
In the prior art, methods for repairing a solid state disk SSD mainly include methods of firmware repair, chip data reassembly, interface conversion, physical replacement, and the like. However, the prior art has the problem that either the technical solution is too complicated or the replacement fittings are too expensive.
In the prior art, a simple and practical method for accessing a failed solid state disk without extra cost is not available.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a data reading method of a fault solid state disk, which realizes the purpose of accessing the fault solid state disk by accessing the data of the solid state disk in a logic address addressing mode through creating a decoding table file or reading the data of the solid state disk in an internal decoding mode. The invention comprises the following steps:
s100: connecting the solid state disk to a device with an SATA interface;
s200: judging whether the solid state disk is normally ready, if so, executing the step S300, otherwise, ending the process;
s300: acquiring first basic information of the solid state disk, wherein the first basic information comprises a manufacturer, a model, an interface type and a disk identifier;
s400: acquiring basic parameters of the solid state disk, including an ID number of a FLASH chip, an estimated capacity, the number of chip blocks, the size of a sector and the size of a page;
s500: judging whether the microcode of the solid state disk can be uploaded, if so, executing the step S600, otherwise, executing the step S700;
s600: uploading the microcode of the solid state disk, acquiring an unlocking mark of the solid state disk, and executing the step S800;
s700: checking the first basic information of the solid state disk, judging whether the checking is passed, if so, executing the step S800, otherwise, ending the process;
s800: judging whether the data of the solid state disk is read by adopting an internal decoding mode, if so, executing a step S900, otherwise, executing a step SA 00;
s900: addressing the physical address of the current sector by adopting internal decoding and reading data, and executing step SC 00;
SA 00: creating a decoding table file: analyzing FLASH chip data of the solid state disk, including scanning management area data of the FLASH chip of the solid state disk, calculating a mapping relation between a physical address and a logical address, and storing the mapping relation to the decoding table file;
SB 00: according to the decoding table file, addressing the physical address of the current sector and reading data;
SC 00: judging whether the sector number corresponding to the current read data is the maximum sector number of the solid state disk, if so, ending the process, otherwise, executing the step SD 00;
SD 00: the next sector number is addressed, which is taken as the current sector number, and step S800 is repeatedly performed.
Preferably, the main board of the device is provided with a SATA interface.
Preferably, the device has a function of converting a non-SATA interface to a SATA interface, and the non-SATA interface includes a USB interface, a PCIE interface, and an IDE interface.
Preferably, the device comprises a computer and an embedded device.
Preferably, the disk manager of the apparatus displays the first basic information of the solid state disk, and then the solid state disk is in normal ready state.
Preferably, the step S600 includes the steps of:
s601: acquiring second basic information of the solid state disk, judging whether the microcode is uploaded successfully, if so, executing step S602, otherwise, exiting the process;
s602: and judging whether the second basic information has an unlocking mark, if so, executing the step S800, and otherwise, exiting the process.
Preferably, the step S700 includes the steps of:
s701: setting one or more input buffer area data, wherein the input buffer area data are used for reading response data of the solid state disk;
s702: sequentially writing one or more input buffer area data into the solid state disk;
s703: reading the response data of the solid state disk;
s704: and judging whether the response data has a mark, if so, executing the step S800, and otherwise, exiting the process.
The method provided by the invention can be used for accessing the fault solid state disk simply and practically without extra cost.
Drawings
FIG. 1 is a general flow diagram of a method provided by the present invention;
FIG. 2 is a flowchart illustrating a method for determining whether the verification passes;
fig. 3 is an exemplary diagram of accessing 0 sectors of data of a solid state disk by means of logical address addressing in another embodiment provided by the present invention.
Detailed Description
Fig. 1 shows a general flow chart of the method provided by the present invention. As shown in fig. 1, the method comprises the following steps:
s100: and connecting the solid state disk to a device with the SATA interface. The device comprises a computer and various embedded devices, wherein the mainboard is provided with an SATA interface and can send instructions to the solid state disk through the SATA interface and receive the response of the solid state disk;
the device can also be a computer and various embedded devices of which the mainboard does not have an SATA interface, but has non-SATA interfaces such as a USB interface and/or a PCIE interface and/or an IDE interface, and the non-SATA interfaces have the function of converting the SATA interface.
In this embodiment, a computer with a SATA interface on a motherboard is used as the device, which will be referred to as a computer hereinafter.
S200: judging whether the solid state disk is normally ready, if so, executing the step S300, otherwise, ending the process;
specifically, the solid state disk is connected to the computer, the disk manager at the computer end is opened, after 5 seconds, if the first basic information of the solid state disk is displayed in the disk manager, the solid state disk is in a normal ready state, and step S300 may be performed, otherwise, the process is ended.
In addition, if the solid state disk can normally accept and respond to the instruction sent by the computer, and the computer can acquire the state information of the solid state disk, it can also be considered that the solid state disk is in a normal ready state.
S300: the method comprises the steps of obtaining first basic information of the solid state disk, wherein the first basic information comprises a manufacturer, a model, an interface type, a disk identifier and the like.
S400: the method comprises the following steps of obtaining basic parameters of the solid state disk, including an ID number of a FLASH chip, an estimated capacity, the number of chip blocks, the size of a sector and the size of a page:
s401: analyzing the ID number, the chip block number, the sector size and the page size of a FLASH chip of the solid state disk, and reading the display capacity of the solid state disk;
s402: judging whether the display capacity is equal to the estimated capacity of the solid state disk, if so, executing the step S500, otherwise, executing the step S403;
s403: and judging whether the display capacity is smaller than 1 gigabyte, if so, executing the step S500, and otherwise, ending the flow. In this embodiment, the display capacity of the solid state disk is 8MB, that is, 8 mbytes, which is smaller than 1 gbyte, step S500 is executed.
S500: and judging whether the microcode of the solid state disk can be uploaded, if so, executing the step S600, otherwise, executing the step S700.
It should be noted that not every solid state disk needs to upload microcode, so that a judgment needs to be performed, and the next operation is performed according to the judgment result.
S600: uploading a microcode of the solid state disk, acquiring an unlocking mark of the solid state disk, and executing the step S800;
step S600 includes the following steps:
s601: acquiring second basic information of the solid state disk, judging whether the microcode is uploaded successfully, if so, executing the step S602, otherwise, exiting the process;
specifically, the second basic information may be obtained according to a second basic information obtaining instruction of the solid state disk, where the second basic information includes an identifier indicating whether the microcode is successfully uploaded.
S602: and judging whether the second basic information has an unlocking mark, if so, executing the step S800, and otherwise, exiting the process.
S700: checking first basic information of the solid state disk, judging whether the checking is passed, specifically, judging whether response data has a mark, if so, executing the step S800, otherwise, ending the process;
fig. 2 shows a specific flowchart for determining whether the verification passes in the method provided by the present invention. As shown in fig. 2, step S700 includes the steps of:
s701: setting one or more input buffer area data, wherein the input buffer area data are used for reading response data of the solid state disk;
in each solid state disk, the data of the input buffer area used for reading the response data of the solid state disk are different, and the data of the input buffer area used for reading the response data of the solid state disk, which correspond to each other, can be searched from the description data of each solid state disk. In this embodiment, there are 3 pieces of input buffer data, which are respectively:
the first time of executing the write command to write in the data of the input buffer area of the solid state disk, the byte length of the write command is 512 bytes, and the data of the input buffer area is as follows:
04 d7 6a 8c f9 fa c6 d1 ee 1e e3 8d e3 42 ff 95
80 86 fc 9e 75 aa 18 67 6a ce 34 2f 5f f2 50 f7
54 16 6d bf 49 3a 89 87 3e 5e a5 4f 33 82 c1 17
28 a6 dd df 1d ca f9 a7 12 ee 15 70 07 12 32 38
fc 35 4e 00 f1 59 6a c8 e6 7d 86 90 db a1 a2 58
d0 c5 be 20 c5 e9 da e8 ba 0d f7 b0 e7 d8 a0 98
78 e5 9f 61 6d 09 bc 29 62 2d d8 f1 57 51 f4 b9
e6 b0 4a d2 00 00 00 00 00 00 00 00 00 00 00 00
be 14 96 b5 23 00 00 00 0a 4d b9 32 ff 70 d5 fa
f4 94 f1 c2 e9 b8 0d 8b de dc 29 53 d3 00 46 1b
70 44 43 24 65 68 5f ec 5a 8c 7b b4 4f b0 97 7c
44 d4 b3 44 39 f8 cf 0c 2e 1c ec d4 23 40 08 9d
18 64 24 65 0d 88 40 2d 02 ac 5c f5 f7 cf 78 bd
ec f3 94 85 e1 17 b1 4d d6 3b cd 15 cb 5f e9 dd
94 13 76 c6 89 37 92 8e 7e 5b ae 56 73 7f ca 1e
68 a3 e6 e6 00 00 00 00 52 eb 1e 77 47 0f 3b 3f
42 41 52 45 46 4f 4f 54 33 2d 46 41 43 54 4f 52
59 2d 52 4f 4d 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
executing a write command for the second time to write data in an input buffer area of the solid state disk, wherein the byte length of the write command is 512 bytes, and the data in the input buffer area is as follows:
10 84 20 aa e4 65 53 f3 b8 47 b6 85 8c 29 19 a3
60 0b 7c f0 34 ed de 3d 08 cf 41 8b dc b0 a4 d8
b0 92 07 26 84 74 6a 73 58 56 cd c0 2c 38 30 0e
00 1a 93 5b d4 fb f5 a8 a8 dd 58 f6 7c bf bb 43
50 a1 1e 91 24 83 81 de f8 64 e4 2b cc 46 47 79
a0 28 aa c6 74 0a 0d 14 48 ec 6f 61 1c ce d2 ae
f0 af 35 fc c4 91 98 49 98 73 fb 96 6c 55 5e e4
40 37 c1 31 14 19 24 7f e8 fa 86 cc e7 d8 a0 98
90 be 4c 67 64 a0 af b4 38 82 12 02 0c 64 75 4f
98 0f 61 bf 00 00 00 00 00 00 00 00 00 00 00 00
be 14 96 b5 23 00 00 00 28 18 b5 a2 fc f9 17 f0
d0 db 7a 3d a4 bd dd 8a 78 9f 40 d8 4c 81 a3 25
20 63 06 73 f4 44 69 c0 c8 26 cc 0d 9c 08 2f 5b
70 ea 91 a8 44 cc f4 f5 18 ae 57 43 ec 8f ba 90
c0 71 1d de 94 53 80 2b 68 35 e3 78 3c 17 46 c6
10 f9 a8 13 e4 da 0b 61 b8 bc 6e ae 8c 9e d1 fb
60 80 34 49 34 62 97 96 08 44 fa e3 dc 25 5d 31
00 8f 4b b4 d4 70 ae 01 a8 52 11 4f 7c 34 74 9c
50 16 d7 e9 24 f8 39 37 f8 d9 9c 84 cc bb ff d1
a0 9d 62 1f 00 00 00 00 48 61 28 ba 34 a8 ef c2
42 41 52 45 46 4f 4f 54 33 2d 46 41 43 54 4f 52
59 2d 52 4f 4d 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
and executing a write command for the third time to write data in an input buffer area of the solid state disk, wherein the byte length of the data is 0 byte, and the data in the input buffer area is empty.
S702: sequentially writing one or more input buffer area data into the solid state disk;
in each solid state disk, the write instruction for reading the response data of the solid state disk is different, and the write instruction for reading the response data of the solid state disk corresponding to each write instruction can be searched from the description data of each solid state disk. The number of write instructions in this embodiment is 3, which are:
the first time the write instruction is executed is 0x00,0x01,0x00,0x00,0x00,0xE0,0x30
The second time the write instruction is executed is 0x00,0x01,0x00,0x00,0x00,0xE0,0x30
The third time the write instruction is executed is 0x03,0x46,0x00,0x00,0x00,0xE0,0xEF
Correspondingly, the instructions executed 3 times and the data in the input buffer are respectively as follows:
executing the write command and the input buffer data for the first time:
0x00,0x01,0x00,0x00,0x00,0xE0,0x30，
04 d7 6a 8c f9 fa c6 d1 ee 1e e3 8d e3 42 ff 95
80 86 fc 9e 75 aa 18 67 6a ce 34 2f 5f f2 50f7
54 16 6d bf 49 3a 89 87 3e 5e a5 4f 33 82 c1 17
28 a6 dd df 1d ca f9 a7 12 ee 15 70 07 12 32 38
fc 35 4e 00 f1 59 6a c8 e6 7d 86 90 db a1 a2 58
d0 c5 be 20 c5 e9 da e8 ba 0d f7 b0 e7 d8 a0 98
78 e5 9f 61 6d 09 bc 29 62 2d d8 f1 57 51 f4 b9
e6 b0 4a d2 00 00 00 00 00 00 00 00 00 00 00 00
be 14 96 b5 23 00 00 00 0a 4d b9 32 ff 70 d5 fa
f4 94 f1 c2 e9 b8 0d 8b de dc 29 53 d3 00 46 1b
70 44 43 24 65 68 5f ec 5a 8c 7b b4 4f b0 97 7c
44 d4 b3 44 39 f8 cf 0c 2e 1c ec d4 23 40 08 9d
18 64 24 65 0d 88 40 2d 02 ac 5c f5 f7 cf 78 bd
ec f3 94 85 e1 17 b1 4d d6 3b cd 15 cb 5f e9 dd
94 13 76 c6 89 37 92 8e 7e 5b ae 56 73 7f ca 1e
68 a3 e6 e6 00 00 00 00 52 eb 1e 77 47 0f 3b 3f
42 41 52 45 46 4f 4f 54 33 2d 46 41 43 54 4f 52
59 2d 52 4f 4d 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
executing the write command and the input buffer data for the second time:
0x00,0x01,0x00,0x00,0x00,0xE0,0x30，
10 84 20 aa e4 65 53 f3 b8 47 b6 85 8c 29 19 a3
60 0b 7c f0 34 ed de 3d 08 cf 41 8b dc b0 a4 d8
b0 92 07 26 84 74 6a 73 58 56 cd c0 2c 38 30 0e
00 1a 93 5b d4 fb f5 a8 a8 dd 58 f6 7c bf bb 43
50 a1 1e 91 24 83 81 de f8 64 e4 2b cc 46 47 79
a0 28 aa c6 74 0a 0d 14 48 ec 6f 61 1c ce d2 ae
f0 af 35 fc c4 91 98 49 98 73 fb 96 6c 55 5e e4
40 37 c1 31 14 19 24 7f e8 fa 86 cc e7 d8 a0 98
90 be 4c 67 64 a0 af b4 38 82 12 02 0c 64 75 4f
98 0f 61 bf 00 00 00 00 00 00 00 00 00 00 00 00
be 14 96 b5 23 00 00 00 28 18 b5 a2 fc f9 17 f0
d0 db 7a 3d a4 bd dd 8a 78 9f 40 d8 4c 81 a3 25
20 63 06 73 f4 44 69 c0 c8 26 cc 0d 9c 08 2f 5b
70 ea 91 a8 44 cc f4 f5 18 ae 57 43 ec 8f ba 90
c0 71 1d de 94 53 80 2b 68 35 e3 78 3c 17 46 c6
10 f9 a8 13 e4 da 0b 61 b8 bc 6e ae 8c 9e d1 fb
60 80 34 49 34 62 97 96 08 44 fa e3 dc 25 5d 31
00 8f 4b b4 d4 70 ae 01 a8 52 11 4f 7c 34 74 9c
50 16 d7 e9 24 f8 39 37 f8 d9 9c 84 cc bb ff d1
a0 9d 62 1f 00 00 00 00 48 61 28 ba 34 a8 ef c2
42 41 52 45 46 4f 4f 54 33 2d 46 41 43 54 4f 52
59 2d 52 4f 4d 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
and executing the write instruction and the input buffer data thereof for the third time:
0x03,0x46,0x00,0x00,0x00,0xE0,0xEF, data buffer empty, byte length 0.
S703: and reading response data of the solid state disk.
And executing a read instruction, wherein the byte length of data of an output buffer area of the read instruction is 512 bytes, and the data is an arbitrary value. The read command and the data of the output buffer area thereof are used for reading the response data of the solid state disk, and the byte length of the response data is 512 bytes.
In this embodiment, the read command is 0x00,0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE0,0x25, the byte length of the data in the output buffer is 512 bytes, the data is an arbitrary value, and after the execution is completed, the response data of the current solid state disk is read as follows:
10 84 20 aa e4 65 53 f3 b8 47 b6 85 8c 29 19 a3
60 0b 7c f0 34 ed de 3d 08 cf 41 8b dc b0 a4 d8
b0 92 07 26 84 74 6a 73 58 56 cd c0 2c 38 30 0e
00 1a 93 5b d4 fb f5 a8 a8 dd 58 f6 7c bf bb 43
50 a1 1e 91 24 83 81 de f8 64 e4 2b cc 46 47 79
a0 28 aa c6 74 0a 0d 14 48 ec 6f 61 1c ce d2 ae
f0 af 35 fc c4 91 98 49 98 73 fb 96 6c 55 5e e4
40 37 c1 31 14 19 24 7f e8 fa 86 cc 33 2d f4 a2
90 be 4c 67 64 a0 af b4 38 82 12 02 0c 64 75 4f
98 0f 61 bf00 00 00 00 00 00 00 00 00 00 00 00
72 c0 42 ab 23 00 00 00 28 18 b5 a2 fc f9 17 f0
d0 db 7a 3d a4 bd dd 8a 78 9f 40 d8 4c 81 a3 25
20 63 06 73 f4 44 69 c0 c8 26 cc 0d 9c 08 2f 5b
70 ea 91 a8 44 cc f4 f5 18 ae 57 43 ec 8f ba 90
c0 71 1d de 94 53 80 2b 68 35 e3 78 3c 17 46 c6
10 f9 a8 13 e4 da 0b 61 b8 bc 6e ae 8c 9e d1 fb
60 80 34 49 34 62 97 96 08 44 fa e3 dc 25 5d 31
00 8f 4b b4 d4 70 ae 01 a8 52 11 4f 7c 34 74 9c
50 16 d7 e9 24 f8 39 37 f8 d9 9c 84 cc bb ff d1
a0 9d 62 1f 00 00 00 00 48 61 28 ba 34 a8 ef c2
42 41 52 45 46 4f 4f 54 33 2d 46 41 43 54 4f 52
59 2d 52 4f 4d 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
s704: and judging whether the response data has a mark, if so, executing the step S800, and otherwise, exiting the process.
It should be noted that the mark of each solid state disk is different, and the corresponding mark can be searched from the description data of each solid state disk. In this embodiment, the flag is 0x0b 000000.
In this embodiment, the content of the first 4 bytes of the read response data is 0x0b 000000, and the content thereof is determined to be the flag 0x0b 000000, so step S800 is executed.
S800: judging whether the data of the solid state disk is read by adopting an internal decoding mode, if so, executing a step S900, otherwise, executing a step SA 00;
s900: addressing the physical address of the current sector by adopting internal decoding and reading data, namely accessing the data of the current sector of the solid state disk in a logical address addressing mode, and executing step SC 00;
SA 00: creating a decoding table file: analyzing FLASH chip data of the solid state disk, including scanning management area data of a FLASH chip of the solid state disk, calculating a mapping relation between a physical address and a logical address, and storing the mapping relation into a decoding table file;
SB 00: according to the decoding table file, addressing the physical address of the current sector and reading data, namely accessing the current sector data of the solid state disk in a logical address addressing mode;
SC 00: judging whether the sector number corresponding to the current read data is the maximum sector number of the solid state disk, if so, ending the process, otherwise, executing the step SD 00;
SD 00: the next sector number is addressed, and step S800 is repeatedly performed with the next sector number as the current sector number.
Fig. 3 shows an exemplary diagram of accessing 0 sectors of data of a solid state disk by means of logical address addressing in step S900 or step SB00 in another embodiment provided by the present invention.
The method solves the technical problem that no method for accessing the fault solid state disk, which is simple and practical and does not need extra cost, exists in the prior art.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations are possible to those skilled in the art in light of the above teachings, and that all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (7)
1. A data reading method of a fault solid state disk is characterized by comprising the following steps:
s100: connecting the solid state disk to a device with an SATA interface;
s200: judging whether the solid state disk is normally ready, if so, executing the step S300, otherwise, ending the process;
s300: acquiring first basic information of the solid state disk, wherein the first basic information comprises a manufacturer, a model, an interface type and a disk identifier;
s400: acquiring basic parameters of the solid state disk, including an ID number of a FLASH chip, an estimated capacity, the number of chip blocks, the size of a sector and the size of a page;
s500: judging whether the microcode of the solid state disk can be uploaded, if so, executing the step S600, otherwise, executing the step S700;
s600: uploading the microcode of the solid state disk, acquiring an unlocking mark of the solid state disk, and executing the step S800;
s700: checking the first basic information of the solid state disk, judging whether the checking is passed, if so, executing the step S800, otherwise, ending the process;
s800: judging whether the data of the solid state disk is read by adopting an internal decoding mode, if so, executing a step S900, otherwise, executing a step SA 00;
s900: addressing the physical address of the current sector by adopting internal decoding and reading data, and executing step SC 00;
SA 00: creating a decoding table file: analyzing FLASH chip data of the solid state disk, including scanning management area data of the FLASH chip of the solid state disk, calculating a mapping relation between a physical address and a logical address, and storing the mapping relation to the decoding table file;
SB 00: according to the decoding table file, addressing the physical address of the current sector and reading data;
SC 00: judging whether the sector number corresponding to the current read data is the maximum sector number of the solid state disk, if so, ending the process, otherwise, executing the step SD 00;
SD 00: the next sector number is addressed, which is taken as the current sector number, and step S800 is repeatedly performed.
2. The method as claimed in claim 1, wherein the device has a SATA interface on a motherboard.
3. The method as claimed in claim 1, wherein the device has a function of converting non-SATA interfaces to SATA interfaces, and the non-SATA interfaces include a USB interface, a PCIE interface, and an IDE interface.
4. The method as claimed in claim 1, wherein the apparatus includes a computer and an embedded device.
5. The method as claimed in claim 1, wherein a disk manager of the apparatus displays the first basic information of the solid state disk, and the solid state disk is in a normal ready state.
6. The method according to claim 1, wherein the step S600 includes the following steps:
s601: acquiring second basic information of the solid state disk, judging whether the microcode is uploaded successfully, if so, executing step S602, otherwise, exiting the process;
s602: and judging whether the second basic information has an unlocking mark, if so, executing the step S800, and otherwise, exiting the process.
7. The method according to claim 1, wherein the step S700 includes the following steps:
s701: setting one or more input buffer area data, wherein the input buffer area data are used for reading response data of the solid state disk;
s702: sequentially writing one or more input buffer area data into the solid state disk;
s703: reading the response data of the solid state disk;
s704: and judging whether the response data has a mark, if so, executing the step S800, and otherwise, exiting the process.
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