CN107797940A - A kind of restoration methods for hard disc data area of Toshiba can not be accessed - Google Patents
A kind of restoration methods for hard disc data area of Toshiba can not be accessed Download PDFInfo
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- CN107797940A CN107797940A CN201711162816.4A CN201711162816A CN107797940A CN 107797940 A CN107797940 A CN 107797940A CN 201711162816 A CN201711162816 A CN 201711162816A CN 107797940 A CN107797940 A CN 107797940A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
- G06F12/0802—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches
- G06F12/0866—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches for peripheral storage systems, e.g. disk cache
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- 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
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0614—Improving the reliability of storage systems
- G06F3/0619—Improving the reliability of storage systems in relation to data integrity, e.g. data losses, bit errors
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- 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
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0638—Organizing or formatting or addressing of data
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- 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
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0673—Single storage device
- G06F3/0674—Disk device
- G06F3/0676—Magnetic disk device
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
The invention discloses a kind of restoration methods for that can not access hard disc data area of Toshiba, it is characterised in that comprises the following steps:S1:Read the firmware area of hard disk and search DD module ids；S2:Using the first byte address of mark as initial address, 0x1FFFE bytes are redirected backward, and read and jump to the byte content of current address and latter byte content；S3:Judge whether above-mentioned two byte content is zero, if it is, jumping to step S1, otherwise perform step S4；S4:Using the latter byte address of mark as original position, it is the byte content that XX is multiplied by 8 to read byte length；S5:Using the latter byte address of mark as original position, 0x10000 bytes are redirected backward, and read the byte content that byte length is multiplied by 8 for XX；S6:It is determined that data needed for sector LBA physical address and reading need to be read.The present invention is by the physical address corresponding to the LBA of addressing logic sector and reads the data of the physical address, to reach the purpose for reading and recovering data, solves the problems, such as that prior art is present.
Description
Technical field
The invention belongs to data recovery field, is related to a kind of restoration methods of hard disk, more particularly to a kind of for that can not visit
Ask the restoration methods in hard disc data area of Toshiba.
Background technology
In the technical field of data recovery, defective storage medium is frequently encountered, causes that data can not be read, and
Important data are all often priceless treasures for a user.
After bad track occurs in hard disk firmware area of Toshiba, easily cause DD module damages, cause the module afterbody check value and
Data check value after module generation bad track changes, and causes module check value to mismatch, causes hard disk not to be identified,
Or hard disk can be identified but data field can not be accessed.
In the prior art, the method that is typically integrally read using firmware area module is recovered, but if firmware
There is bad track in the magnetic track where area's DD modules, module entirety reading manner will abandon the data of verification error, thus can not read
Modulus block is effective, complete data.
The content of the invention
The present invention is in view of the shortcomings of the prior art and above mentioned problem, proposition are a kind of for that can not access hard disc data area of Toshiba
Restoration methods, by the physical address corresponding to the LBA of addressing logic sector and read the data of the physical address, come reach read
The purpose of data is taken and recovered, efficiently solves the problem of prior art is present, the described method comprises the following steps:
S1:Read the firmware area of the hard disk and search DD module id 0x02000000XX00FFFF, wherein, the XX
For the hexadecimal number being arbitrarily not zero；
S2:Using the first byte address of the mark 0x02000000XX00FFFF as initial address, 0x1FFFE is redirected backward
Byte, and read and jump to the byte content of current address and latter byte content；
S3:Judge whether two read byte contents are zero, if it is, jumping to step S1, otherwise perform step S4；
S4:Using the latter byte address of the mark 0x02000000XX00FFFF as initial address, byte length is read
8 byte content is multiplied by for the XX, wherein, the XX is the hexadecimal number being arbitrarily not zero；The content read is to patrol
Section address table is collected, the logical segment bit address table is made up of multiple logical segment bit address, wherein, each logic section
The length of location is eight bytes；
S5:Using the latter byte address of the mark 0x02000000XX00FFFF as initial address, redirect backward
0x10000 bytes, to jump to current address as initial address, it is the byte content that the XX is multiplied by 8 to read byte length, its
In, the XX is the hexadecimal number being arbitrarily not zero；The byte content read is offset address table, the offset address table
It is made up of multiple offset address, wherein, the length of each offset address is eight bytes；
S6:It is determined that data needed for sector LBA physical address and reading need to be read, wherein, the value of the LBA is entered for 16
Number processed.
Preferably, the logical segment bit address and the offset address since the highest byte of eight bytes to minimum
Byte is read.
Preferably, in the logical segment bit address table, each logical segment bit address has unique group number position；
In the offset address table, each offset address has unique group number position；Pass through group number position described in identical
Put, the logical segment bit address each corresponds with the offset address.
Preferably, step S6 comprises the following steps:
S601:Judge whether the value of the sector LBA is equal to any logic section in the logical segment bit address table
Address, if it is, the value of the sector LBA is equal to the physical address of the sector LBA, perform step S605；Otherwise, perform
Step S602；
S602:The first logical segment bit address of the value less than the sector LBA is searched in the logical segment bit address table
And the second logical segment bit address of the value more than the sector LBA, determine the first logical segment bit address in the logical segment
Group number position N in bit address table, wherein, the first logical segment bit address is adjacent with the second logical segment bit address
Logical segment bit address, N are the natural number more than zero；
S603:According to the group number position N of the first logical segment bit address in the logical segment bit address table,
Find the offset address included in identical group number position N in offset address table, the as described sector LBA skew
Location；
S604:Value of the physical address of the sector LBA equal to the sector LBA adds the sum of the offset address；
S605:According to the physical address of the sector LBA, the data of the sector LBA are read.
Preferably, the logical segment bit address table includes whole logical segment bit address of the hard disk.
Each corresponded preferably, the offset address table includes each logical segment bit address in the hard disk
The offset address.
The beneficial effects of the invention are as follows:By the physical address corresponding to the LBA of addressing logic sector and read this physically
The data of location, to reach the purpose for reading and recovering data, solve the problems, such as that prior art is present.
Brief description of the drawings
Fig. 1 is the main flow chart of the present invention；
Fig. 2 is the mark of DD modules and the data structure diagram of logical address section table in the embodiment of the present invention；
Fig. 3 is to be addressed in the embodiment of the present invention and read the data structure diagram of two bytes；
Fig. 4 is the data structure diagram of offset address table in the embodiment of the present invention；
Fig. 5 be the present invention in determine sector LBA physical address and reading needed for data flow chart.
Embodiment
The present invention is further elaborated with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of restoration methods for that can not access hard disc data area of Toshiba, comprise the following steps:
S1:Read the firmware area of hard disk and search DD module id 0x02000000XX00FFFF, wherein, the XX is to appoint
The hexadecimal number that meaning is not zero:
Fig. 2 shows the data structure diagram of DD module ids and logical address section table in the present embodiment.As shown in Fig. 2
XX value is 0x13, and DD module ids are 0x020000001300FFFF, as shown in the content of black rectangle frame in Fig. 2；
S2:Using mark 0x020000001300FFFF first byte address as initial address, 0x1FFFE words are redirected backward
Section, and read and jump to the byte content of current address and latter byte content, as shown in heavy black part in Fig. 3, this implementation
In example, two byte content is 0x21E6；
S3:Judge whether two read byte contents are zero, if it is, jumping to step S1, search DD modules again
Mark, otherwise perform step S4；
S4:As shown in Fig. 2 using the latter byte address for identifying 0x020000001300FFFF as initial address, word is read
Section length is the byte content that 0x13 is multiplied by 8, i.e. byte length 0x98, as shown in Fig. 2 initial address is 0x00000008,
End address is 0x0000009F；The content read is logical segment bit address table, and logical segment bit address table is by multiple logical segments
Bit address forms, wherein, the length of each logical segment bit address is eight bytes, and eight bytes as shown in heavy black in Fig. 2 are each
Logical segment bit address is read since the highest byte of eight bytes to lowest byte, therefore, the two logical segment bit address point
It is not 0x000000003AC74858 and 0x0000000037C9BBD0；
S5:Using the latter byte address for identifying 0x020000001300FFFF as initial address, 0x10000 words are redirected backward
Section, as shown in figure 4, to jump to current address 0x00010008 as initial address, it is the word that 0x13 is multiplied by 8 to read byte length
Save content, i.e. byte length 0x98, as shown in figure 4, initial address is 0x00010008, end address 0x0001009F；
The byte content read is offset address table, and offset address table is made up of multiple offset address, wherein, each offset address
Length is eight bytes, eight bytes as shown in heavy black in Fig. 4, each offset address since the highest byte of eight bytes to
Lowest byte read, therefore, the two offset address be respectively 0x00000000000CA320 and
0x00000000000CD590；
S6:It is determined that data needed for sector LBA physical address and reading need to be read, wherein, LBA value is hexadecimal
Number；In the present embodiment, by taking the LBA=976773167 of sector as an example, 976773167 to be converted to hexadecimal be 0x3A38602F, should
Step S6 includes following steps as shown in Figure 5:
S601:Whether equal to any logic section in logical segment bit address table to judge sector LBA value 0x3A38602F
Location, if it is, sector LBA value 0x3A38602F is equal to sector LBA physical address 0x3A38602F, perform step
S605；Otherwise, step S602 is performed；
S602:The first logical segment bit address less than 0x3A38602F is searched in logical segment bit address table and is more than
0x3A38602F the second logical segment bit address, determine group number position of the first logical segment bit address in logical segment bit address table
N, wherein, the first logical segment bit address is adjacent logical segment bit address with the second logical segment bit address, and N is the nature more than zero
Number；As shown in Fig. 2 0x3A38602F is more than the first logical segment bit address 0x0000000037C9BBD0 and is less than the second logical segment
Bit address 0x000000003AC74858, the first logical segment bit address 0x0000000037C9BBD0 and the second logical segment bit address
0x000000003AC74858 is adjacent logical segment bit address, in the present embodiment, the first logical segment bit address
0x0000000037C9BBD0 group number position is 17, i.e. the 17th eight bytes since initial address is 0x00000008
Logical segment bit address；
S603:According to group number positions of the first logical segment bit address 0x0000000037C9BBD0 in logical segment bit address table
17 are put, the offset address included in identical group number position 17, as sector 0x3A38602F are found in offset address table
Offset address；As shown in figure 4, the offset address of the 17th eight bytes since initial address is 0x00010008
0x00000000000CA320, as sector 0x3A38602F offset address；
S604:Value of the sector LBA physical address equal to sector LBA adds the sum of offset address, i.e. 0x3A38602F+
0x00000000000CA320=0x000000003A45034F；
S605:According to sector LBA physical address, the number of the data in the physical address, as sector LBA is read
According to.
It should be appreciated that the invention is not restricted to above-mentioned citing, for those of ordinary skills, can basis
Described above is improved or converted, and all these modifications and variations should all belong to the protection model of appended claims of the present invention
Enclose.
Claims (6)
1. a kind of restoration methods for hard disc data area of Toshiba can not be accessed, it is characterised in that comprise the following steps:
S1:Read the firmware area of the hard disk and search DD module id 0x02000000XX00FFFF, wherein, the XX is to appoint
The hexadecimal number that meaning is not zero；
S2:Using the first byte address of the mark 0x02000000XX00FFFF as initial address, 0x1FFFE words are redirected backward
Section, and read and jump to the byte content of current address and latter byte content；
S3:Judge whether two read byte contents are zero, if it is, jumping to step S1, otherwise perform step S4；
S4:Using the latter byte address of the mark 0x02000000XX00FFFF as initial address, it is institute to read byte length
The byte content that XX is multiplied by 8 is stated, wherein, the XX is the hexadecimal number being arbitrarily not zero；The content read is logical segment
Bit address table, the logical segment bit address table are made up of multiple logical segment bit address, wherein, each logical segment bit address
Length is eight bytes；
S5:Using the latter byte address of the mark 0x02000000XX00FFFF as initial address, 0x10000 words are redirected backward
Section, to jump to current address as initial address, it is the byte content that the XX is multiplied by 8 to read byte length, wherein, the XX
For the hexadecimal number being arbitrarily not zero；The byte content read is offset address table, and the offset address table is by multiple inclined
Address composition is moved, wherein, the length of each offset address is eight bytes；
S6:It is determined that data needed for sector LBA physical address and reading need to be read, wherein, the value of the LBA is hexadecimal
Number.
A kind of 2. restoration methods for hard disc data area of Toshiba can not be accessed according to claim 1, it is characterised in that
The logical segment bit address and the offset address are read since the highest byte of eight bytes to lowest byte.
A kind of 3. restoration methods for hard disc data area of Toshiba can not be accessed according to claim 2, it is characterised in that
In the logical segment bit address table, each logical segment bit address has unique group number position；In the offset address table,
Each offset address has unique group number position；By group number position described in identical, the logic section
Location each corresponds with the offset address.
A kind of 4. restoration methods for hard disc data area of Toshiba can not be accessed according to claim 3, it is characterised in that
The step S6 comprises the following steps:
S601:Judge whether the value of the sector LBA is equal to any logical segment bit address in the logical segment bit address table,
If it is, the value of the sector LBA is equal to the physical address of the sector LBA, step S605 is performed；Otherwise, step is performed
S602；
S602:The first logical segment bit address of the value less than the sector LBA and big is searched in the logical segment bit address table
In the second logical segment bit address of the value of the sector LBA, determine the first logical segment bit address in the logic section
Group number position N in the table of location, wherein, the first logical segment bit address and the second logical segment bit address are adjacent logic
Section address, N are the natural number more than zero；
S603:According to the group number position N of the first logical segment bit address in the logical segment bit address table, offseting
The offset address included in identical group number position N, the as described sector LBA offset address are found in address table；
S604:Value of the physical address of the sector LBA equal to the sector LBA adds the sum of the offset address；
S605:According to the physical address of the sector LBA, the data of the sector LBA are read.
A kind of 5. restoration methods for hard disc data area of Toshiba can not be accessed according to claim 4, it is characterised in that
The logical segment bit address table includes whole logical segment bit address of the hard disk.
A kind of 6. restoration methods for hard disc data area of Toshiba can not be accessed according to claim 5, it is characterised in that
The offset address table include the hard disk in each logical segment bit address each correspondingly the offset address.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711162816.4A CN107797940B (en) | 2017-11-21 | 2017-11-21 | Recovery method for Toshiba hard disk data area incapable of being accessed |
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| CN201711162816.4A CN107797940B (en) | 2017-11-21 | 2017-11-21 | Recovery method for Toshiba hard disk data area incapable of being accessed |
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Cited By (2)
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