CN109656747B - Method for carving data adaptation module of composite Western digital hard disk - Google Patents
Method for carving data adaptation module of composite Western digital hard disk Download PDFInfo
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Abstract
The invention discloses a method for carving a data adaptation module of a West-Redwood hard disk, which is characterized by comprising the following steps of: s100: searching and analyzing a section management field of the head of the data adaptation module; s200: numbering the sections and searching core sections, wherein the length of a management field of each section is four bytes, the contents of the first two bytes are the initial address of the section data of the current section stored in the small-end format, the contents of the last two bytes are the byte length of the section data of the current section stored in the small-end format, and the core sections comprise a second section, a third section, a fourth section, a fifth section, an eighth section and a twelfth section; s300: carving and repeating and extracting section data of the core section; s400: recombining the extracted section data of the core section; s500: and accessing the data area of the Western digital hard disk and determining that the data reading is successful.
Description
Technical Field
The invention belongs to the field of data recovery, and relates to a method for carving a data adaptation module of a West-Redwood hard disk.
Background
In the field of data recovery, data recovery and data extraction become increasingly difficult with the deployment and application of large-capacity hard disks. In particular, data recovery and data extraction have been a difficult point for the case of scratch and damage in the firmware area of the hard disk. Generally, module corruption can be replaced or repaired for rechecking, but important modules and unique module corruption have no way to be replaced or repaired by other modules of the same firmware version, particularly for data adaptation modules.
At present, the copy-over method of the western digital hard disk data adaptation module does not exist, so after the data adaptation module is damaged, the success rate of data recovery and data extraction is extremely low, and the data recovery is not mentioned at all. The invention relates to a carving and replying method for a data adaptation module of a Western digital hard disk, which reloads the data adaptation module which can normally work in a firmware area of the hard disk, provides a memory environment of the firmware area which normally works, and achieves the aim of normally accessing the data area.
In the prior art, a method for carving a data adaptation module of a western digital hard disk is not available, so that data cannot be read and recovered after a large-capacity storage device similar to the western digital hard disk and a hard disk of a mobile office device break down.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for carving and copying a data adaptation module of a Western digital hard disk, which comprises the following steps of carving and copying and extracting section data of a core section, recombining the section data of the core section, writing the section data back to a firmware area of the Western digital hard disk, and finally reading the data of the Western digital hard disk, wherein the method comprises the following steps:
s100: searching and analyzing a section management field of the head of the data adaptation module;
s200: numbering the sections and searching core sections, wherein the length of a management field of each section is four bytes, the contents of the first two bytes are the initial address of the section data of the current section stored in the small-end format, the contents of the last two bytes are the byte length of the section data of the current section stored in the small-end format, and the core sections comprise a second section, a third section, a fourth section, a fifth section, an eighth section and a twelfth section;
s300: carving and repeating and extracting section data of the core section;
s400: recombining the extracted section data of the core section;
s500: and accessing the data area of the Western digital hard disk and determining that the data reading is successful.
Preferably, the step S100 includes the steps of:
s101: addressing the header;
s102: reading the content of the first two bytes of the header as the starting address of the section management field;
s103: and addressing the initial address of the section management field, taking four bytes as a group, reading each group of data to be respectively used as the content of the management field of each corresponding section until the content of the continuous four bytes is all zero.
Preferably, the step S200 includes the steps of:
according to the sets of data read in step S103, the second, third, fourth, fifth, eighth and twelfth segments are used as the core segments to be copied.
Preferably, in step S300, the specific steps of duplicating and extracting the segment data of the second segment are as follows:
s02-1: reading data of a management field of a second section and addressing section data of the second section;
s02-2: dividing the section data of the second section into 8 sub-sections;
s02-3: the contents of the first two subsections are read and the contents of the remaining 6 subsections are zeroed out.
Preferably, in step S300, the specific steps of duplicating and extracting the section data of the third section are as follows:
s03-1: reading data of a management field of a third section and addressing section data of the third section;
s03-2: dividing the section data of the third section into 3 sub-sections, wherein each sub-section is divided into 8 grandchild sections;
s03-3: and reading the contents of the first two grandchild nodes in the first child node region, and filling the contents of the rest 6 grandchild nodes and the rest 2 child nodes with zero.
Preferably, in step S300, the specific steps of duplicating and extracting the segment data of the fourth segment are as follows:
s04-1: reading data of a management field of a fourth section and addressing section data of the fourth section;
s04-2: dividing the segment data of the fourth segment into 3 sub-segments, wherein each sub-segment is divided into 8 grandchild segments;
s04-3: and reading the content of the first 4 bytes in the first two grandchild nodes of the first child node, filling zero in the content of the rest bytes, and filling zero in the content of the rest 6 grandchild nodes and the rest 2 child nodes.
Preferably, in step S300, the specific steps of duplicating and extracting the section data of the fifth section are as follows:
s05-1: reading data of a management field of a fifth section and addressing section data of the fifth section;
s05-2: grouping the section data of the fifth section by taking 10 bytes as a group;
s05-3: the first 4 bytes of content of each group are read and the remaining bytes of content are filled with zeros.
Preferably, in step S300, the specific steps of duplicating and extracting the segment data of the eighth segment are as follows:
s08-1: reading data of a management field of an eighth section and addressing section data of the eighth section;
s08-2: the starting position of the section data of the eighth section is shifted backwards by 0xD0 bytes, and the content of continuous 8 bytes is read;
the starting position of the section data of the eighth section is shifted backwards by 0xE0 bytes, and the content of continuous 6 bytes is read;
the starting position of the section data of the eighth section is shifted backwards by 0x15E bytes, the content of continuous 6 bytes is read, and the rest bytes of the content of the eighth section are filled with zero;
the specific steps of carving, repeating and extracting the section data of the twelfth section are as follows:
and reading the data of the management field of the twelfth section, addressing the section data of the twelfth section, and reading the section data of the twelfth section.
Preferably, the step S400 includes the steps of:
s401: reconstructing data of a data adaptation module according to the section number sequence and the section data of the core section which is carved, repeated and extracted;
s402: and verifying the recombined data of the data adaptation module and writing back the data to a firmware area of the Western digital hard disk.
The invention has the beneficial effects that: the technical problem that a method for carving a data adaptation module of a composite Western digital hard disk does not exist in the prior art is solved.
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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 a data structure of a header according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a data structure of section data of a second section according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a data structure of section data of a third section according to an embodiment of the present invention;
FIG. 5 is a block data structure diagram of a fourth block according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating a data structure of section data of a fifth section according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating a data structure of section data of an eighth section according to an embodiment of the present invention;
fig. 8 is a schematic data structure diagram of section data of a twelfth section according to an embodiment of the present invention.
Detailed Description
The invention is further illustrated with reference to the figures and examples.
In this embodiment, a west number failure hard disk is selected, and fig. 1 shows a general flow chart of the method provided by the present invention, as shown in fig. 1, the method of the present invention includes the following steps:
s100: finding and parsing a section management field of a header of the data adaptation module, step S100 includes the following steps:
s101: an addressing header;
FIG. 2 is a diagram illustrating a data structure of a module header in an embodiment of the invention. As shown in fig. 2, the header has a start address of 0x1E and is two bytes in length and is stored in a small-endian format.
S102: reading the content of the first two bytes of the header as the initial address of the section management field; as shown in fig. 2, the content of the first two bytes of the header is 0x5800, which indicates that the start address of the zone management field is 0x 0058.
S103: the start address 0x0058 of the addressing section management field takes four bytes as a group, and reads each group of data as the content of the management field of each corresponding section respectively until the content of the continuous four bytes is all zero. As shown in fig. 2, starting from the start address 0x0058, data in a group of four bytes is the content of the management field of each corresponding zone, for example, the content of the management field of the first zone is 0x98000001, the content of the management field of the second zone is 0x98010006, and so on. The content of the consecutive four bytes is all zeros indicating that the management area of the header is finished.
S200: the sections are numbered and the core section is found, for example, the content of the management field of the first section is 0x98000001, the content of the management field of the second section is 0x98010006, and so on. The length of the management field of each section is four bytes, the contents of the first two bytes are the initial address of the section data of the current section stored in the small-end format, the contents of the last two bytes are the byte length of the section data of the current section stored in the small-end format, and the core section comprises a second section, a third section, a fourth section, a fifth section, an eighth section and a twelfth section;
for example, the content of the management field of the second section is 0x98010006, where the first two bytes of content 0x9801 is the start address 0x0198 of the section data of the current section stored in the mini format, and the last two bytes of content 0x0006 is the byte length 0x0600 of the section data of the current section stored in the mini format.
The core segments include second, third, fourth, fifth, eighth, and twelfth segments, as indicated by the contents of the rectangular boxes in FIG. 2.
S300: carving, repeating and extracting section data of the core section;
in step S300, the specific steps of duplicating and extracting the segment data of the second segment are as follows:
fig. 3 is a diagram illustrating a data structure of section data of the second section according to an embodiment of the present invention.
As shown in fig. 2, the content of the management field of the second extent is 0x98010006, where the first two bytes of the content 0x9801 is the start address 0x0198 of the section data of the current extent stored in the mini format, and the last two bytes of the content 0x0006 is the byte length 0x0600 of the section data of the current extent stored in the mini format.
S02-1: reading the data of the management field of the second area as 0x98010006 and addressing to address 0x0198 as the start address of the section data of the second area, as shown in fig. 3;
s02-2: dividing the segment data of the second section into 8 sub-segment regions, wherein the byte length of each sub-segment region is 0xC0 bytes;
s02-3: the contents of the first two subsections are read and the contents of the remaining 6 subsections are zeroed out.
The specific steps of carving, repeating and extracting the section data of the third section are as follows:
FIG. 4 is a diagram illustrating a data structure of section data of a third section according to an embodiment of the present invention
As shown in fig. 2, the content of the management field of the third section is 0x9807B052, where the first two bytes of the content 0x9807 is the start address 0x0798 of the section data of the current section stored in the little endian format, and the last two bytes of the content 0xB052 is the byte length 0x52B0 of the section data of the current section stored in the little endian format.
S03-1: data 0x9807B052 of the management field of the third section is read and addressed to an address 0x0798 which is the start address of the section data of the third section, as shown in fig. 4;
s03-2: dividing the section data of the third section into 3 sub-sections, dividing each sub-section into 8 grand section, and setting the byte length of each grand section as 0x372 bytes;
s03-3: and reading the contents of the first two grandchild nodes in the first child node region, and filling the contents of the rest 6 grandchild nodes and the rest 2 child nodes with zero.
The specific steps of carving, repeating and extracting the section data of the fourth section are as follows:
as shown in fig. 2, the content of the management field of the fourth section is 0x485AE007, where the first two bytes of content 0x485A is the start address 0x5a48 of the section data of the current section stored in the little endian format, and the last two bytes of content 0xE007 is the byte length 0x07E0 of the section data of the current section stored in the little endian format.
FIG. 5 is a diagram illustrating a data structure of section data of a fourth section according to an embodiment of the present invention
S04-1: data 0x485AE007 of the management field of the fourth section is read and addressed to address 0x5a48 as the start address of the section data of the fourth section, as shown in fig. 5;
s04-2: dividing the segment data of the fourth segment into 3 sub-segment regions, dividing each sub-segment region into 8 grand-segment regions, wherein the byte length of each grand-segment region is 0x54 bytes;
s04-3: and reading the content of the first 4 bytes in the first two grandchild nodes of the first child node, filling zero in the content of the rest bytes, and filling zero in the content of the rest 6 grandchild nodes and the rest 2 child nodes.
The specific steps of carving, repeating and extracting the section data of the fifth section are as follows:
as shown in fig. 2, the content of the management field of the fifth section is 0x2862a019, wherein the first two bytes of content 0x2862 is the start address 0x6228 of the section data of the current section stored in the little endian format, and the last two bytes of content 0xA019 is the byte length 0x 19A0 of the section data of the current section stored in the little endian format.
Fig. 6 is a diagram illustrating a data structure of section data of a fifth section according to an embodiment of the present invention.
S05-1: data 0x2862a019 of the management field of the fifth section is read and addressed to address 0x6228 which is the start address of the section data of the fifth section, as shown in fig. 6;
s05-2: grouping the section data of the fifth section by taking 10 bytes as a group;
s05-3: the first 4 bytes of content of each group are read and the remaining bytes of content are filled with zeros.
The specific steps of carving, repeating and extracting the section data of the eighth section are as follows:
as shown in fig. 2, the content of the management field of the eighth section is 0x60812805, where the first two bytes of content 0x6081 is the start address 0x8160 of the section data of the current section stored in the mini format, and the last two bytes of content 0x2805 is the byte length 0x0528 of the section data of the current section stored in the mini format.
Fig. 7 is a diagram illustrating a data structure of section data of an eighth section according to an embodiment of the present invention.
S08-1: reading data 0x60812805 of the management field of the eighth section, and addressing to address 0x8160 as the starting address of the section data of the eighth section, as shown in fig. 7;
s08-2: the starting position of the section data of the eighth section is shifted backward by 0xD0 bytes, and the content of continuous 8 bytes is read, namely 0x 3939393939393939393939393939;
the start position of the section data of the eighth section is shifted backward by 0xE0 bytes, reading the content 0x3a343a00343A of consecutive 6 bytes;
the starting position of the section data of the eighth section is shifted backwards by 0x15E bytes, the content of continuous 6 bytes is read, and the rest bytes of the content of the eighth section are filled with zero;
the specific steps of carving, repeating and extracting the section data of the twelfth section are as follows:
as shown in fig. 2, the content of the management field of the twelfth section is 0x84EA2400, where the first two bytes of content 0x84EA is the start address 0xEA84 of the section data of the current section stored in the mini format, and the last two bytes of content 0x2400 is the byte length 0x0024 of the section data of the current section stored in the mini format.
Fig. 8 is a diagram illustrating a data structure of section data of a twelfth section according to an embodiment of the present invention.
The data 0x84EA2400 of the management field of the twelfth section is read and addressed to the address 0xEA84 as the start address of the section data of the twelfth section, and as shown in fig. 8, the section data of the twelfth section having a byte length of 0x24 is read.
S400: recombining the extracted section data of the core section; step S400 includes the following steps:
s401: reconstructing data of the data adaptation module according to the section number sequence and the section data of the core section which is carved, repeated and extracted; as described above, the contents of the management fields of the respective corresponding extents are read in groups of four bytes starting from address 0x58 in fig. 2, for a total of 15 extents. In the present invention, the core segments include the second, third, fourth, fifth, eighth and twelfth segments in the sequence of segment numbers from one to fifteen. It should be noted that, the contents of zero padding in the section data of the core section must be filled in during the reassembly to keep the data structure and data length unchanged.
S402: and verifying the recombined data of the data adaptation module and writing back the data to a firmware area of the Western digital hard disk.
S500: and accessing a data area of the Western digital hard disk and determining that the data reading is successful.
The method solves the technical problem that no method for carving a data adaptation module of a West-West hard disk 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 (4)
1. A method for carving a data adaptation module of a West-West hard disk is characterized by comprising the following steps:
s100: searching and analyzing a section management field of the head of the data adaptation module;
s200: numbering the sections and searching core sections, wherein the length of a management field of each section is four bytes, the contents of the first two bytes are the initial address of the section data of the current section stored in the small-end format, the contents of the last two bytes are the byte length of the section data of the current section stored in the small-end format, and the core sections comprise a second section, a third section, a fourth section, a fifth section, an eighth section and a twelfth section;
s300: carving and repeating and extracting section data of the core section;
the specific steps of carving, repeating and extracting the section data of the second section are as follows:
s02-1: reading data of a management field of a second section and addressing section data of the second section;
s02-2: dividing the section data of the second section into 8 sub-sections;
s02-3: reading the contents of the first two subsections and filling the contents of the rest 6 subsections with zero;
the specific steps of carving, repeating and extracting the section data of the third section are as follows:
s03-1: reading data of a management field of a third section and addressing section data of the third section;
s03-2: dividing the section data of the third section into 3 sub-sections, wherein each sub-section is divided into 8 grandchild sections;
s03-3: reading the contents of the first two grandchild node areas in the first child node area, and filling the contents of the rest 6 grandchild node areas and the rest 2 child node areas with zero;
the specific steps of carving, repeating and extracting the section data of the fourth section are as follows:
s04-1: reading data of a management field of a fourth section and addressing section data of the fourth section;
s04-2: dividing the segment data of the fourth segment into 3 sub-segments, wherein each sub-segment is divided into 8 grandchild segments;
s04-3: reading the content of the first 4 bytes in the first two grandchild nodes of the first child node, filling the content of the rest bytes with zero, and filling the content of the rest 6 grandchild nodes and the rest 2 child nodes with zero;
the specific steps of carving, repeating and extracting the section data of the fifth section are as follows:
s05-1: reading data of a management field of a fifth section and addressing section data of the fifth section;
s05-2: grouping the section data of the fifth section by taking 10 bytes as a group;
s05-3: reading the content of the first 4 bytes of each group, and filling the content of the rest bytes with zero;
the specific steps of carving, repeating and extracting the section data of the eighth section are as follows:
s08-1: reading data of a management field of an eighth section and addressing section data of the eighth section;
s08-2: the starting position of the section data of the eighth section is shifted backwards by 0xD0 bytes, and the content of continuous 8 bytes is read;
the starting position of the section data of the eighth section is shifted backwards by 0xE0 bytes, and the content of continuous 6 bytes is read;
the starting position of the section data of the eighth section is shifted backwards by 0x15E bytes, the content of continuous 6 bytes is read, and the rest bytes of the content of the eighth section are filled with zero;
the specific steps of carving, repeating and extracting the section data of the twelfth section are as follows:
reading data of a management field of a twelfth section and addressing section data of the twelfth section, and reading the section data of the twelfth section;
s400: recombining the extracted section data of the core section;
s500: and accessing the data area of the Western digital hard disk and determining that the data reading is successful.
2. The method for carving the data adaptation module of the west complex hard disk of claim 1, characterized in that the said step S100 includes the following steps:
s101: addressing the header;
s102: reading the content of the first two bytes of the header as the starting address of the section management field;
s103: and addressing the initial address of the section management field, taking four bytes as a group, reading each group of data to be respectively used as the content of the management field of each corresponding section until the content of the continuous four bytes is all zero.
3. The method for carving the data adaptation module of the west-complex hard disk as claimed in claim 2, wherein the concrete step of step S200 is:
according to the sets of data read in step S103, the second, third, fourth, fifth, eighth and twelfth segments are used as the core segments to be copied.
4. The method for carving the data adaptation module of the west complex hard disk of claim 1, wherein the step S400 comprises the following steps:
s401: reconstructing data of a data adaptation module according to the section number sequence and the section data of the core section which is carved, repeated and extracted;
s402: and verifying the recombined data of the data adaptation module and writing back the data to a firmware area of the Western digital hard disk.
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