CN112527195B - Method for extracting physical data of solid state disk - Google Patents
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- G06—COMPUTING; CALCULATING OR COUNTING
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- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
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Abstract
The invention discloses a method for extracting physical data of a solid state disk, which is characterized by comprising the following steps: s100: judging whether the solid state disk is normally ready, if so, executing the step S200, otherwise, ending the process; s200: acquiring the extraction authority of the physical data of the solid state disk; s300: analyzing basic parameters of the solid state disk; s400: the method for circularly extracting the physical data of the solid state disk comprises the following steps: s401: acquiring a minimum unit of the extracted physical data; s402: acquiring data of the physical page of the solid state disk; s403: and extracting the physical data of the solid state disk.
Description
Technical Field
The invention belongs to the field of information security technology and data recovery, and relates to a method for extracting physical data of a solid state disk.
Background
In the fields of information security technology and data recovery, the capacity of hard disks is continuously increased and the use amount of the hard disks is continuously enlarged, and meanwhile, the shipment volume of Hard Disk Drives (HDD) type hard disks is continuously reduced, and the shipment volume of Solid State Disk (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 the solid state disk SSD output in 2018 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 due to its fast read/write speed. With the continuous increase of the Solid State Disk (SSD) shipment volume, more and more problems appear. The failure is not only limited by the number of writes, but also affected by other conditions, and some issued safety reports indicate that some servers and solid state disks used by storage products are defective, data on the hard disks is lost after about 32746 hours of power up, and the data is unrecoverable, which also results in very serious consequences.
In addition, for data protection, when the read-write response of the solid state disk SSD is slow, the usage time is close to the lifetime limit, or the logical address cannot be normally accessed, the solid state disk SSD needs to be subjected to data mirroring (i.e. physical data extraction). At this time, not only the data mirroring of the logical layer needs to be performed, but also the physical mirroring (i.e., the physical data extraction) needs to be performed, and the physical mirroring manner can extract the physical data more comprehensively. In the prior art, a simple and practical method for extracting physical data of a solid state disk without extra cost is not available.
Disclosure of Invention
The invention provides a method for extracting solid state disk physical data, which solves the technical problem of solid state disk physical data extraction by analyzing basic parameters of a Solid State Disk (SSD), calculating to obtain the number of channels, the number of chips per channel, the number of blocks per chip, the number of pages per block and the page size of the SSD, and circularly extracting the physical data of the SSD. The invention comprises the following steps:
s100: judging whether the solid state disk is normally ready, if so, executing the step S200, otherwise, ending the process;
s200: acquiring the extraction authority of the physical data of the solid state disk;
s300: analyzing basic parameters of the solid state disk;
s400: the method for circularly extracting the physical data of the solid state disk comprises the following steps:
s401: acquiring a minimum unit of the extracted physical data;
s402: acquiring data of the physical page of the solid state disk;
s403: and extracting the physical data of the solid state disk.
Preferably, the step S100 includes the steps of:
s101: connecting the solid state disk to a computer by adopting an SATA interface;
s102: and judging whether the solid state disk is ready, if so, executing the step S200, otherwise, ending the process.
Preferably, the step S200 includes the steps of:
s201: acquiring attributes of the solid state disk, including whether locking is performed, a firmware mode, a logic access authority and a physical access authority;
s202: judging whether the physical access authority exists, if so, executing the step S300, otherwise, executing the step S203;
s203: acquiring a microcode file of the solid state disk and writing the microcode file into the solid state disk through a computer;
s204: obtaining the attributes of the solid state disk again, wherein the attributes comprise whether locking is carried out or not, a firmware mode, a logic access authority and a physical access authority;
s205: and judging whether the mobile terminal has the physical access right again, if so, executing the step S300, otherwise, exiting the process.
Preferably, the step S300 includes the steps of:
s301: acquiring basic parameters of the solid state disk, wherein the basic parameters comprise physical attribute parameters, and the physical attribute parameters comprise the number of physical channels, the number of chips per channel, the number of blocks per chip, the number of pages per block and the page size;
s302: analyzing basic parameters including obtaining physical channel number, chip number per channel, block number per chip, and page size, wherein,
acquiring the content of the 12 th byte in the basic parameter, right shifting the content by 3 bits, performing OR operation on the content and 0x07, and adding 1 to the obtained result to obtain the number of physical channels;
acquiring the content of the 12 th byte in the basic parameters, carrying out OR operation on the content and 0x7, and adding 1 to the obtained result to be used as the number of chips in each channel;
obtaining the 17 th byte content in the basic parameter multiplied by 0x100 and added with the 18 th byte content as the number of blocks of each chip;
acquiring the content of the 4 th byte in the basic parameter and multiplying the result by 0x200 to be used as the page size;
s303: sequentially executing a first writing instruction and a first reading instruction to acquire the page number of each block of the solid state disk, wherein,
executing the first writing instruction at the computer end: the values of the instruction register of the first write instruction are 0x00,0x01,0xAA,0x55,0x00,0xE0 and 0xCA respectively, the size of the buffer is 512 bytes, the first byte of the buffer is 0xF0, the second byte of the buffer is 0x2A, the third byte to the sixth byte are offset sizes stored in a big end format, the data of the twelfth byte is 0x1, the 509 th byte to the 512 th byte are 0x55AA55AA, and the offset size of the solid state disk is a fixed value;
executing the first reading instruction at the computer end: the values of the instruction register of the first read instruction are 0x00,0x01,0xAA,0x55,0x00,0xE0 and 0xC8, the size of the data buffer is 512, the data is arbitrary, and the 0x3B byte content and the 0x3C byte content in the read 512-byte content are the page number of each block.
The step S401 includes the steps of: and acquiring the channel value of the solid state disk and the number of chips contained in each channel, wherein the minimum unit is a single chip.
Preferably, the step S402 includes:
s4021: sending the acquired parameter information to the solid state disk by adopting a second write instruction, wherein the parameter information comprises a channel number, a chip number, a block number and a page number of a page:
executing the second write instruction at the computer end, wherein the values of an instruction register of the second write instruction are 0x00,0x01,0xAA,0x55,0x00,0xE0 and 0xCA, the buffer size is 512 bytes, the contents of the first byte and the second byte of the buffer are 0xF0 and 0x0A respectively, the content of the fourth byte is a block number, the content of the fifth byte is lower eight-bit data of a page number, the content of the eighth byte is higher eight-bit data of the page number, the content of the ninth byte is 0x01, the content of the eleventh byte is chip number left-shifted by three bits plus a channel number, the content of the twelfth byte is a page size, and the content of the last four bytes of the buffer is 0x55AA55AA, wherein the unit of the page size is a sector;
s4022: reading page data of the solid state disk by adopting a second reading instruction: and executing the second read instruction at the computer end, wherein the values of the instruction register of the second read instruction are 0x00,0x81,0xAA,0x55,0x00,0xE0 and 0xC8, the buffer size is 0x10200 bytes, the content is an arbitrary value, and the read content is data of a physical page.
Preferably, the step S403 includes:
respectively traversing the 0 th block to the maximum block in each chip, wherein the block number of the maximum block is the block number of the chip;
respectively traversing from the 0 th page to the maximum page in each block, wherein the page number of the maximum page is the page number of the block;
and extracting the physical data of each block and each page in the block to acquire the physical data of the solid state disk.
The method has the beneficial effects that: compared with a chip data extraction method, the method has the advantages of shorter extraction time, smaller extraction risk, no need of verification and repair of data, no need of decryption of data and the like.
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FIG. 1 is a general flow diagram of a method provided by the present invention;
fig. 2 is a diagram illustrating an example of a data structure of basic parameters of a solid state disk according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating an example of a data structure of basic parameters of a solid state disk according to an embodiment of the present invention;
FIG. 4 is a result diagram illustrating the analysis of basic parameters according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating an example of a structure of buffer data of a second write command according to an embodiment of the present invention.
Detailed Description
The invention takes an SM2258G master-controlled solid state disk (namely, a master control chip of the solid state disk is an SM2258G series) as an example, and provides a method for extracting physical data of the solid state disk. 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: judging whether the solid state disk is normally ready, if so, executing the step S200, otherwise, ending the process;
step S100 includes the steps of:
s101: connecting the solid state disk to a computer by adopting an SATA interface;
s102: and judging whether the solid state disk is ready, if so, executing the step S200, otherwise, ending the process.
S200: acquiring the extraction authority of the physical data of the solid state disk;
s201: acquiring attributes of the solid state disk, including whether locking is performed, a firmware mode, a logic access authority and a physical access authority;
s202: judging whether the physical access authority exists, if so, executing step S300, otherwise, executing step S203;
fig. 2 is a diagram illustrating an example of a data structure of basic parameters of a solid state disk in an embodiment provided in the present invention. As shown in fig. 2, the content of the fifth byte in the read data, as shown in the rectangular box in fig. 2, is 0x00, which indicates that there is no physical access right of the solid state disk currently, and the flow proceeds to step S203; if the content of the fifth byte in the read data is 0x01, which indicates that the solid state disk has the physical access right, the flow advances to step S300.
S203: acquiring a microcode file of the solid state disk and writing the microcode file into the solid state disk through a computer;
s204: obtaining the attributes of the solid state disk again, wherein the attributes comprise whether locking is carried out or not, a firmware mode, a logic access authority and a physical access authority;
s205: and judging whether the mobile terminal has the physical access right again, if so, executing the step S300, and otherwise, exiting the process.
Fig. 3 is a diagram illustrating an example of a data structure of basic parameters of a solid state disk in an embodiment provided in the present invention. As shown in fig. 3, after the microcode file is written into the solid state disk by the computer, the content of the fifth byte in the data is read, and the content shown in the rectangular frame in fig. 3 becomes 0x01, which indicates that the physical access right of the solid state disk is currently possessed, and the flow proceeds to step S300.
If the content of the fifth byte in the read data is still 0x00, it indicates that there is no physical access right of the solid state disk, that is, it indicates that the physical access right of the solid state disk cannot be obtained, and then the process ends.
S300: analyzing the basic parameters of the solid state disk, wherein the step S300 comprises the following steps:
s301: acquiring basic parameters of the solid state disk, wherein the basic parameters comprise physical attribute parameters, and the physical attribute parameters comprise the number of physical channels, the number of chips of each channel, the number of blocks of each chip, the number of pages of each block and the page size;
s302: analyzing basic parameters including obtaining physical channel number, chip number per channel, block number per chip, and page size, wherein,
acquiring the content of the 12 th byte in the basic parameter, right shifting the content by 3 bits, and performing OR operation on the content and 0x07, wherein the sum of 1 of the obtained result is used as the number of physical channels;
acquiring the content of the 12 th byte in the basic parameters, carrying out OR operation on the content and 0x7, and adding 1 to the obtained result to obtain the number of chips in each channel;
obtaining the 17 th byte content in the basic parameter multiplied by 0x100 and added with the 18 th byte content as the number of blocks of each chip;
acquiring the content of the 4 th byte in the basic parameter and multiplying the result by 0x200 to be used as the page size;
s303: and sequentially executing a first writing instruction and a first reading instruction to acquire the number of pages of each block of the solid state disk, wherein,
executing a first writing instruction at the computer end: the values of the instruction register of the first write instruction are 0x00,0x01,0xAA,0x55,0x00,0xE0 and 0xCA, the size of the buffer area is 512 bytes, the first byte of the buffer area is 0xF0, the second byte of the buffer area is 0x2A, the third byte to the sixth byte are offset sizes stored in a big end format, the data of the twelfth byte is 0x1, the 509 byte to the 512 byte are 0x55AA55AA, and the offset size of the solid state disk is a fixed value;
executing a first read instruction at the computer end: the values of the command registers of the first read command are 0x00,0x01,0xAA,0x55,0x00,0xE0 and 0xC8, respectively, the size of the data buffer area is 512, the data is arbitrary, and the 0x3B byte content and the 0x3C byte content in the read 512 byte content are each page number.
FIG. 4 is a diagram illustrating a result of parsing basic parameters in one embodiment provided by the present invention. Through the above steps S301 to S303, the number of channels, the number of chips per channel, the number of blocks per chip, the number of pages per block, and the page size of the solid state disk are obtained.
S400: the method for circularly extracting the physical data of the solid state disk comprises the following steps:
s401: acquiring the minimum unit of the extracted physical data: and acquiring the channel value of the solid state disk and the number of chips contained in each channel, wherein the minimum unit is a single chip.
S402: acquiring data of a physical page of the solid state disk, wherein the step S402 includes:
s4021: and sending the acquired parameter information to the solid state disk by adopting a second write instruction, wherein the parameter information comprises a channel number, a chip number, a block number and a page number of a page:
executing a second write command at the computer end, wherein the values of a command register of the second write command are 0x00,0x01,0xAA,0x55,0x00,0xE0 and 0xCA respectively, the buffer size is 512 bytes, the contents of the first byte and the second byte of the buffer are 0xF0 and 0x0A respectively, the content of the fourth byte is a block number, the content of the fifth byte is lower eight-bit data of a page number, the content of the eighth byte is higher eight-bit data of the page number, the content of the ninth byte is 0x01, the content of the eleventh byte is chip number left-shifted by three plus a channel number, the content of the twelfth byte is a page size, and the content of the last four bytes of the buffer is 0x55AA55AA, wherein the unit of the page size is a sector;
FIG. 5 is a diagram illustrating an example of a structure of buffer data of a second write command according to an embodiment of the present invention. As shown in fig. 5, the size of the buffer is 512 bytes, the contents of the first and second bytes of the buffer are 0xF0 and 0x0A, respectively, the content of the fourth byte is a block number, the content of the fifth byte is lower eight bits of data of a page number, the content of the eighth byte is upper eight bits of data of the page number, and the contents of the last four bytes of the buffer are 0x55 AA.
S4022: reading page data of the solid state disk by adopting a second reading instruction: the computer executes a second read command, the values of the command registers of the second read command are 0x00,0x81,0xAA,0x55,0x00,0xE0 and 0xC8, respectively, the buffer size is 0x10200 bytes, the content is an arbitrary value, and the read content is data of a physical page.
S403: extracting physical data of the solid state disk, wherein step S403 includes:
respectively traversing the 0 th block to the maximum block in each chip, wherein the block number of the maximum block is the block number of the chip;
respectively traversing from the 0 th page to the maximum page in each block, wherein the page number of the maximum page is the page number of the block;
and extracting the physical data of each block and each page in the block to acquire the physical data of the solid state disk.
The method solves the technical problem that no method for extracting the physical data of the 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 (6)
1. A method for extracting physical data of a solid state disk is characterized by comprising the following steps:
s100: judging whether the solid state disk is normally ready, if so, executing the step S200, otherwise, ending the process;
s200: acquiring the extraction authority of the physical data of the solid state disk;
s300: analyzing the basic parameters of the solid state disk, wherein the step S300 includes the following steps:
s301: acquiring basic parameters of the solid state disk, wherein the basic parameters comprise physical attribute parameters, and the physical attribute parameters comprise the number of physical channels, the number of chips of each channel, the number of blocks of each chip, the number of pages of each block and the page size;
s302: analyzing basic parameters including obtaining physical channel number, chip number per channel, block number per chip, and page size, wherein,
acquiring the content of the 12 th byte in the basic parameter, right shifting the content by 3 bits, and performing OR operation on the content and 0x07, wherein the sum of 1 of the obtained result is used as the number of physical channels;
acquiring the content of the 12 th byte in the basic parameters, carrying out OR operation on the content and 0x7, and adding 1 to the obtained result to obtain the number of chips in each channel;
obtaining the 17 th byte content in the basic parameter multiplied by 0x100 and added with the 18 th byte content as the number of blocks of each chip;
acquiring the content of the 4 th byte in the basic parameter and multiplying the result by 0x200 to be used as the page size;
s303: sequentially executing a first writing instruction and a first reading instruction to acquire the page number of each block of the solid state disk, wherein,
executing the first writing instruction at the computer end: the values of the instruction register of the first write instruction are 0x00,0x01,0xAA,0x55,0x00,0xE0 and 0xCA respectively, the size of the buffer is 512 bytes, the first byte of the buffer is 0xF0, the second byte of the buffer is 0x2A, the third byte to the sixth byte are offset sizes stored in a big end format, the data of the twelfth byte is 0x1, the 509 th byte to the 512 th byte are 0x55AA55AA, and the offset size of the solid state disk is a fixed value;
executing the first reading instruction at the computer end: the values of the instruction register of the first read instruction are 0x00,0x01,0xAA,0x55,0x00,0xE0 and 0xC8 respectively, the size of the data buffer area is 512, the data is arbitrary, and the 0x3B byte content and the 0x3C byte content in the read 512 byte content are each page number;
s400: the method for circularly extracting the physical data of the solid state disk comprises the following steps:
s401: acquiring a minimum unit of the extracted physical data;
s402: acquiring data of the physical page of the solid state disk, wherein the step S402 includes:
s4021: sending the acquired parameter information to the solid state disk by adopting a second write instruction, wherein the parameter information comprises a channel number, a chip number, a block number and a page number of a page:
executing the second write instruction at the computer end, wherein the values of an instruction register of the second write instruction are 0x00,0x01,0xAA,0x55,0x00,0xE0 and 0xCA, the buffer size is 512 bytes, the contents of the first byte and the second byte of the buffer are 0xF0 and 0x0A respectively, the content of the fourth byte is a block number, the content of the fifth byte is lower eight-bit data of a page number, the content of the eighth byte is higher eight-bit data of the page number, the content of the ninth byte is 0x01, the content of the eleventh byte is chip number left-shifted by three bits plus a channel number, the content of the twelfth byte is a page size, and the content of the last four bytes of the buffer is 0x55AA55AA, wherein the unit of the page size is a sector;
s4022: reading page data of the solid state disk by adopting a second reading instruction: executing the second read instruction at the computer end, wherein the values of the instruction register of the second read instruction are 0x00,0x81,0xAA,0x55,0x00,0xE0 and 0x8 respectively, the size of the buffer area is 0x10200 bytes, the content is an arbitrary value, and the read content is data of a physical page;
s403: and extracting the physical data of the solid state disk.
2. The method for extracting physical data from a solid state disk according to claim 1, wherein the step S100 comprises the following steps:
s101: connecting the solid state disk to a computer by adopting an SATA interface;
s102: and judging whether the solid state disk is ready, if so, executing the step S200, otherwise, ending the process.
3. The method for extracting physical data from a solid state disk according to claim 1, wherein the step S200 comprises the following steps:
s201: acquiring attributes of the solid state disk, including whether locking is performed or not, a firmware mode, a logic access authority and a physical access authority;
s202: judging whether the physical access authority exists, if so, executing step S300, otherwise, executing step S203;
s203: acquiring a microcode file of the solid state disk and writing the microcode file into the solid state disk through a computer;
s204: obtaining the attributes of the solid state disk again, wherein the attributes comprise whether locking is carried out or not, a firmware mode, a logic access authority and a physical access authority;
s205: and judging whether the mobile terminal has the physical access right again, if so, executing the step S300, and otherwise, exiting the process.
4. The method according to claim 1, wherein the step S401 includes the following steps: and acquiring the channel value of the solid state disk and the number of chips contained in each channel, wherein the minimum unit is a single chip.
5. The method for extracting physical data from a solid state disk according to claim 1, wherein the step S403 includes:
respectively traversing the 0 th block to the maximum block in each chip, wherein the block number of the maximum block is the block number of the chip;
respectively traversing from the 0 th page to the maximum page in each block, wherein the page number of the maximum page is the page number of the block;
and extracting the physical data of each block and each page in the block to obtain the physical data of the solid state disk.
6. The method for extracting physical data of the solid state disk according to claim 1, wherein the main control chip of the solid state disk is in SM2258G series.
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| US9507523B1 (en) * | 2012-10-12 | 2016-11-29 | Western Digital Technologies, Inc. | Methods, devices and systems for variable size logical page management in a solid state drive |
| WO2014138118A1 (en) * | 2013-03-07 | 2014-09-12 | Peddle Charles I | High speed flash controllers |
| WO2020052321A1 (en) * | 2018-09-12 | 2020-03-19 | 华为技术有限公司 | Data processing method and system |
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