CN109684122B - Method for carving and recovering segment bit table module of failed Western digital hard disk - Google Patents
Method for carving and recovering segment bit table module of failed Western digital hard disk Download PDFInfo
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- G06—COMPUTING; CALCULATING OR COUNTING
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- G06F11/14—Error detection or correction of the data by redundancy in operation
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Abstract
The invention discloses a method for carving and recovering a segment bit table module of a failed Western digital hard disk, which is characterized by comprising the following steps of: s100: connecting a failure Western digital hard disk, waiting for the ready failure Western digital hard disk and recognizing the disk; s200: judging whether a segment bit table module of a failed Western digital hard disk can be carved or not; s300: creating a reorganization file of the segment bit table module and generating a head of the reorganization file; s400: generating a data body of the recombined file; s500: and rechecking the segment table module, and filling the check value into the bytes from 0x0C to 0x0F of the recombined file to finish the reproduction of the segment table module.
Description
Technical Field
The invention belongs to the technical field of information safety, and relates to a method for engraving a segment bit table module of a failed Western digital hard disk.
Background
In the field of information security, with the continuous expansion of the capacity of a hard disk and the continuous increase of user groups of the hard disk, more and more hard disk damage examples are caused, wherein the hard disk damage examples also include the condition that the segment bit table modules of the 0 magnetic head and the 1 magnetic head of the hard disk are damaged, the segment bit table modules are important modules of the hard disk, and the damage of the segment bit table modules can cause the data of the hard disk to be incapable of being read normally. The method can repair the data which cannot be read due to the damage of the segment bit table modules of the 0 magnetic head and the 1 magnetic head of the hard disk, and also improves the success rate of data recovery.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for carving and resetting a segment table module of a faulted West digital hard disk, which achieves the aim of carving and resetting the segment table module by repairing a starting log module and comprises the following steps:
s100: connecting the failure Western digital hard disk, waiting for the ready state of the failure Western digital hard disk and recognizing the disk;
s200: judging whether the segment bit table module of the fault Western digital hard disk can be carved or not;
s300: creating a reorganization file of a segment bit table module and generating a head of the reorganization file;
s400: generating a data body of the reorganized file;
s500: and rechecking the segment table module, and filling a check value into the bytes from 0x0C to 0x0F of the recombined file to finish the reproduction of the segment table module.
Preferably, the step S200 includes the steps of:
s201: reading a starting log module of the failure Western digital hard disk;
s202: and judging whether the byte content after the address 0x100 of the log starting module is all zero, if so, ending the process, otherwise, executing the step S300.
Preferably, the specific steps of step S300 are as follows:
and acquiring the Western digital hard disk with the same model as the failed Western digital hard disk, reading the content of 0x 00-0 x30 bytes in the segment bit table module, and writing the read content into 0x 00-0 x30 bytes of the recombined file.
Preferably, step S400 includes the steps of:
s401: acquiring a Western digital hard disk with the same model as the failed Western digital hard disk and reading a start log module and a segment table module of the Western digital hard disk;
s402: judging whether the byte content after the address 0x100 of the log starting module in the step S401 is all zero, if so, executing the step S401, otherwise, executing the step S403;
s403: reading the value and the byte length of each segment of data in the segment bit table module in the step S401, and searching the value and the corresponding initial address of each segment of data in the start log module in the step S401;
s404: a first segment of the data volume of the reconstituted file is generated, specifically,
the 0x30 bytes of the reorganization file are filled in the quotient of the length of the first segment of data body divided by 4;
0x31 bytes to 0x37 bytes of the reorganized file are zero-filled;
0x38 bytes to 0xCF bytes of the reconstituted file: searching a keyword 0x00003000 in a starting log module of the fault Western digital hard disk, and filling the searched keyword 0x00003000 and subsequent data into bytes 0x 38-0 xCF of the recombined file;
s405: a second segment data volume of the reconstituted file is generated, specifically,
in the start log module of the hard disk with the western number of failures, with 0xE000 as a start address and four bytes as a group, searching backward a first byte content which is not 0x00000000 until a last byte content which is not 0x00000000, if the byte length of data between the first byte content which is not 0x00000000 and the last byte content which is not 0x00000000 is equal to the byte length of the first segment of data body, filling data between the byte contents into 0x2BC bytes to 0x353 bytes of the restructured file, and recording a head address of the data between the byte contents in the start log module of the hard disk with the western number of failures;
s406: determining the third segment of data body and each head address of the data body after the third segment of data body in the reorganized file, specifically,
subtracting the initial address recorded in the step S405 from the initial address of the second segment of data in the start log module searched in the step S403, and recording the difference as an address difference, and subtracting the address difference from the initial address of each data in the start log module searched in each reading step S403 to obtain the initial address of each segment of data in the start log module;
s407: a third segment of the data volume of the reorganized file is generated, specifically,
s4071: acquiring the byte length of the data of the third section of data body: taking the byte length of the third segment of data body obtained in the step S403 as the byte length of the data of the third segment of data body;
s4072: acquiring the first address of the data of the third section of data body: according to the first address of the second segment of data body in the reorganized file obtained in the step S406, the first address is used as the first address of the data of the third segment of data body;
s4073: interchanging 0x00 byte to 0x07 byte content with 0x08 byte to 0x0F byte content;
s4074: writing the data of the third section of data body into the reorganized file according to the byte length of the data of the third section of data body and the first address of the data of the third section of data body;
s408: generating a fourth segment of data body of the recombined file and a data body after the fourth segment of data body, specifically comprising the following steps:
s4081: acquiring the fourth segment of data volume and the byte length of the data volume after the fourth segment of data volume: according to the byte length of each segment of data body obtained in step S403, as the byte length of the data of each segment of data body;
s4082: acquiring the first address of the fourth segment of data body and the data of the data body after the fourth segment of data body: according to the first address of each segment of data body in the reorganized file obtained in the step S406, the first address is used as the first address of the data of each segment of data body;
s4083: writing the data of each segment of data into the reorganized file according to the byte length of the step S4081 and the head address of the data of the step S4082;
s409: ensuring that the byte length of the reorganized file is an integral multiple of 512, filling up the insufficient part at the tail part with zero, and filling the quotient of dividing the byte length of the reorganized file by 512 into 0x0A and 0x0B bytes of the reorganized file.
The invention has the beneficial effects that:
1. the problem that a Western digital hard disk damages the 0-head and 1-head segment bit table modules at the same time so that data cannot be recovered is solved;
2. aiming at the condition that the Western digital hard disk damages 0 head and 1 head at the same time, the aim of recovering data is achieved by re-carving the segment bit table module through the starting log module of the hard disk, the operation is simple, and any hardware of the failed Western digital hard disk does not need to be replaced.
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FIG. 1 is a general flow diagram of a method provided by the present invention;
FIG. 2 is a flowchart illustrating the generation of a data volume of a reorganized file according to the present invention;
FIG. 3 is a block diagram of a segment bit table module according to an embodiment of the present invention.
Detailed Description
The present embodiment relates to the following terms:
a start log module, also referred to as a 2E module;
the segment bit table module, also referred to as the 03 module.
The invention is further illustrated with reference to the figures and examples.
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 comprises the steps of:
s100: connecting a failure Western digital hard disk, waiting for the ready state of the failure Western digital hard disk and recognizing the disk;
s200: judging whether a segment bit table module of a failed Western digital hard disk can be carved or not, wherein the step S200 comprises the following steps:
s201: reading a starting log module of a failure Western digital hard disk;
s202: and judging whether the byte content after the address 0x100 of the log module is all zero, if so, ending the process, otherwise, executing the step S300.
S300: creating a reorganization file of the segment bit table module and generating a header of the reorganization file, wherein the specific steps of the step S300 are as follows:
and acquiring the Western digital hard disk with the same model as the failed Western digital hard disk, reading the content of 0x00 bytes to 0x30 bytes in the segment bit table module, and writing the read content into 0x00 bytes to 0x30 bytes of the recombined file.
S400: generating a data body of the reorganized file, wherein the step S400 comprises the following steps as shown in fig. 2:
s401: acquiring a Western digital hard disk with the same model as a failed Western digital hard disk and reading a start log module and a segment table module of the Western digital hard disk;
s402: judging whether the byte content after the address 0x100 of the log module started in the step S401 is all zero, if so, executing the step S401, otherwise, executing the step S403;
s403: reading the value and the byte length of each segment of data in the step S401 segment bit table module, and searching the value and the corresponding initial address of each segment of data in the step S401 starting log module;
s404: a first segment of the data volume of the reconstituted file is generated, specifically,
0x30 bytes of the reconstructed file are filled in the quotient of the length of the first segment of the data body in bytes divided by 4;
0x31 bytes to 0x37 bytes of the reconstructed file are filled with zero;
0x38 bytes to 0xCF bytes of the reconstructed file: as shown in the content of the rectangular box in fig. 3, a keyword 0x00003000 is searched in a start log module of the hard disk with the number of western faults, and the searched keyword 0x00003000 and subsequent data are filled into bytes 0x38 to bytes 0xCF of the rebuilt file;
s405: a second segment of the data volume of the reconstructed file is generated, specifically,
in a starting log module of a hard disk with a fault western number, 0xE000 is used as a starting address, four bytes are used as a group, the first byte content which is not 0x00000000 is searched backwards until the last byte content which is not 0x00000000, if the byte length of data between the first byte content which is not 0x00000000 and the last byte content which is not 0x00000000 is equal to the byte length of a first segment of data body, the data between the byte contents is filled into 0x2BC bytes to 0x353 bytes of a reorganization file, and the first address of the data between the byte contents in the starting log module of the hard disk with the fault western number is recorded;
s406: determining the third segment of data body and each first address of the data body after the third segment of data body in the reorganized file, specifically,
subtracting the initial address recorded in the step S405 from the initial address of the second segment of data in the start log module searched in the step S403, recording the difference as an address difference, and subtracting the address difference from the initial address of each data in the start log module searched in the step S403 as the initial address of each segment of data in the start log module;
s407: a third segment of the data volume of the reconstituted file is generated, specifically,
s4071: acquiring the byte length of the data of the third section of data body: taking the byte length of the third segment of data body obtained in the step S403 as the byte length of the data of the third segment of data body;
s4072: acquiring the first address of the data of the third section of data body: according to the first address of the second segment of data body in the reorganized file obtained in the step S406, the first address is used as the first address of the data of the third segment of data body;
s4073: interchanging 0x00 byte to 0x07 byte content with 0x08 byte to 0x0F byte content;
s4074: writing the data of the third section of data body into the recombination file according to the byte length of the data of the third section of data body and the first address of the data of the third section of data body;
s408: generating a fourth segment of data body of the recombined file and a data body after the fourth segment of data body, specifically comprising the following steps:
s4081: acquiring the fourth segment of data volume and the byte length of the data volume after the fourth segment of data volume: according to the byte length of each segment of data body obtained in step S403, as the byte length of the data of each segment of data body;
s4082: acquiring the first address of the fourth segment of data body and the data of the data body after the fourth segment of data body: according to the first address of each segment of data body in the reorganized file obtained in the step S406, the first address is used as the first address of the data of each segment of data body;
s4083: writing the data of each segment of data into the reorganization file according to the byte length of the step S4081 and the head address of the data of the step S4082;
s409: the byte length of the reorganized file is ensured to be integer multiples of 512, the insufficient part is filled with zero at the tail part for complementing, and the quotient of dividing the byte length of the reorganized file by 512 is filled into 0x0A and 0x0B bytes of the reorganized file.
S500: and rechecking the segment table module, and filling the check value into the bytes from 0x0C to 0x0F of the recombined file to finish the reproduction of the segment table module.
The method solves the technical problem that no method for engraving and recovering the segment bit table module of the failed Western digital 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 (3)
1. A method for carving a segment bit table module of a failed Western digital hard disk is characterized by comprising the following steps:
s100: connecting the failure Western digital hard disk, waiting for the ready state of the failure Western digital hard disk and recognizing the disk;
s200: judging whether the segment bit table module of the fault Western digital hard disk can be carved or not;
s300: creating a reorganization file of a segment bit table module and generating a head of the reorganization file;
s400: generating a data body of the reorganized file, wherein the step S400 comprises the following steps:
s401: acquiring a Western digital hard disk with the same model as the failed Western digital hard disk and reading a start log module and a segment table module of the Western digital hard disk;
s402: judging whether the byte content after the address 0x100 of the log starting module in the step S401 is all zero, if so, executing the step S401, otherwise, executing the step S403;
s403: reading the value and the byte length of each segment of data in the segment bit table module in the step S401, and searching the value and the corresponding initial address of each segment of data in the start log module in the step S401;
s404: a first segment of the data volume of the reconstituted file is generated, specifically,
the 0x30 bytes of the reorganization file are filled in the quotient of the length of the first segment of data body divided by 4;
0x31 bytes to 0x37 bytes of the reorganized file are zero-filled;
0x38 bytes to 0xCF bytes of the reconstituted file: searching a keyword 0x00003000 in a starting log module of the fault Western digital hard disk, and filling the searched keyword 0x00003000 and subsequent data into bytes 0x 38-0 xCF of the recombined file;
s405: a second segment data volume of the reconstituted file is generated, specifically,
in the start log module of the hard disk with the western number of failures, with 0xE000 as a start address and four bytes as a group, searching backward a first byte content which is not 0x00000000 until a last byte content which is not 0x00000000, if the byte length of data between the first byte content which is not 0x00000000 and the last byte content which is not 0x00000000 is equal to the byte length of the first segment of data body, filling data between the byte contents into 0x2BC bytes to 0x353 bytes of the restructured file, and recording a head address of the data between the byte contents in the start log module of the hard disk with the western number of failures;
s406: determining the third segment of data body and each head address of the data body after the third segment of data body in the reorganized file, specifically,
subtracting the initial address recorded in the step S405 from the initial address of the second segment of data in the start log module searched in the step S403, and recording the difference as an address difference, and subtracting the address difference from the initial address of each data in the start log module searched in each reading step S403 to obtain the initial address of each segment of data in the start log module;
s407: a third segment of the data volume of the reorganized file is generated, specifically,
s4071: acquiring the byte length of the data of the third section of data body: taking the byte length of the third segment of data body obtained in the step S403 as the byte length of the data of the third segment of data body;
s4072: acquiring the first address of the data of the third section of data body: according to the first address of the second segment of data body in the reorganized file obtained in the step S406, the first address is used as the first address of the data of the third segment of data body;
s4073: interchanging 0x00 byte to 0x07 byte content with 0x08 byte to 0x0F byte content;
s4074: writing the data of the third section of data body into the reorganized file according to the byte length of the data of the third section of data body and the first address of the data of the third section of data body;
s408: generating a fourth segment of data body of the recombined file and a data body after the fourth segment of data body, specifically comprising the following steps:
s4081: acquiring the fourth segment of data volume and the byte length of the data volume after the fourth segment of data volume: according to the byte length of each segment of data body obtained in step S403, as the byte length of the data of each segment of data body;
s4082: acquiring the first address of the fourth segment of data body and the data of the data body after the fourth segment of data body: according to the first address of each segment of data body in the reorganized file obtained in the step S406, the first address is used as the first address of the data of each segment of data body;
s4083: writing the data of each segment of data into the reorganized file according to the byte length of the step S4081 and the head address of the data of the step S4082;
s409: ensuring that the byte length of the reorganized file is an integral multiple of 512, filling up the insufficient part at the tail part with zero, and filling the quotient of dividing the byte length of the reorganized file by 512 into 0x0A and 0x0B bytes of the reorganized file;
s500: and rechecking the segment table module, and filling a check value into the bytes from 0x0C to 0x0F of the recombined file to finish the reproduction of the segment table module.
2. The method of claim 1, wherein the step S200 comprises the steps of:
s201: reading a starting log module of the failure Western digital hard disk;
s202: and judging whether the byte content after the address 0x100 of the log starting module is all zero, if so, ending the process, otherwise, executing the step S300.
3. The method for carving a segment bit table module of west hard disk according to claim 2, characterized in that, the concrete step of step S300 is as follows:
and acquiring the Western digital hard disk with the same model as the failed Western digital hard disk, reading the content of 0x 00-0 x30 bytes in the segment bit table module, and writing the read content into 0x 00-0 x30 bytes of the recombined file.
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