CN101206895B - Method for recuperation of disk writen data - Google Patents
Method for recuperation of disk writen data Download PDFInfo
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- CN101206895B CN101206895B CN2007103006739A CN200710300673A CN101206895B CN 101206895 B CN101206895 B CN 101206895B CN 2007103006739 A CN2007103006739 A CN 2007103006739A CN 200710300673 A CN200710300673 A CN 200710300673A CN 101206895 B CN101206895 B CN 101206895B
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Abstract
The invention relates to a recovery method for the written data stored in a disk, which is used for recovering a data when error occurs during the disk is read. The method comprises the following steps that the disk is scanned firstly to obtain the position of the latest written data of the finishing stroke in the last recording of the disk, the position is defined as a next writing position, then the finishing position of successfully recorded data slot of the certain areas in the disk is read, and stored in the memorizer , then when the disk device is required to read the system section data of the file written on the disk according to the next writing position, the section data is firstly decided whether the file system is the file system or not is judge by the disk device. If the section data is not the file system, the earlier obtained finishing position in the certain area is adopted to replace the next writing position obtained by scanning the disk to read the file system, and the disk data is recovered. Thus, the written data of the disk is protected.
Description
Technical field
The present invention relates to a kind of video disc restorative procedure, and when particularly relating to a kind of data that read video disc and making a mistake, recover to write the method for data.
Background technology
Arriving along with the information age, in the face of and numerical data that form differ huge the time from various channel quantity, the light memory medium that have simultaneously that storage volume is big, access speed is fast, is easy to carry about with one and is beneficial to advantages such as preservation has just like become modern's one of indispensable application tool when storage data.
Digital audio-video laser disc (Digital Versatile Disk, DVD) be the media for storing optical information of a new generation, its packing density and capacity are compared to traditional laser disc (Compact Disk, CD) significant progress is all arranged, and its form is also divided into specifications such as DVD-ROM, DVD-R, DVD-RW, DVD-RAM, DVD+R, DVD+RW because of the difference of purposes and each support manufacturer of family.The user only need be by computer CD writer or imprinting medium such as DVD video recorder, can use these DVD imprinting film or data, quite convenient.
Yet, when using the video disc recorded film, sometimes because the defective (for example scratch, fingerprint etc.) that the quality of video disc itself is bad or video disc uses, or situation such as outage takes place suddenly in the imprinting process, and causing video disc imprinting failure, this film data of being noted before will making is committed to the flames.
In detail, when carrying out the film imprinting, the processing mode of file system is different with general imprinting software, when formaing at the beginning, outside the stationkeeping of initialization files system, when not sealing dish in recording process, the position of its file system all is to decide according to the end position of the actual data slot of recording.And if will be when reusing this video disc recorded film next time, then need to carry out earlier the work of data detection, obtaining the file system of recording generation for the last time, and with the data of this file system as basis, continue to carry out and make video recording next time or make envelope dish record.
For instance, Figure 1 shows that known write-once digital audio-video laser disc (Digital VersatileDisk, DVD) synoptic diagram of data.Please refer to Fig. 1, when using write-once digital audio-video laser disc recorded film, whenever after having recorded one piece of data fragment (data slot 110,120), after its end position, promptly set up the file system (file system 130,140) of its relevant information of record, and provide CD-ROM device to read and the played data fragment.
Yet actual when using video disc to make video recording, the footage of being recorded all is by user's decision, so film data length that is produced when not sealing dish and quantity are unfixing.Therefore, in case when problem took place in the video disc recording process, the flow process that will cause making video recording can not normal termination, the file system of video disc also has little time to upgrade.The result not only can't continue to use this video disc imprinting again, even the film of before having recorded also can't recover, and causes result without redemption.
Summary of the invention
In view of this, the invention provides a kind of video disc and write method of data recovery, next writing position with the data slot of each imprinting success, imprinting is to the specific region of video disc or be arranged in the nonvolatile memory of CD-ROM device servo-drive system, when the file system in the video disc reads when making a mistake, just can this specific region or nonvolatile memory in positional information replace the former position that should reading of data of disc player reading file system, thereby disk data is recovered.
For reaching above-mentioned purpose, the present invention proposes a kind of video disc and writes method of data recovery, is used for when reading the video disc file system data and make a mistake data being recovered.The method is to scan video disc earlier, to obtain the next writing position (NWA of the finishing touch data slot of this video disc when last time making video recording, nextwritable address), then read the end position of the data slot that the success in the specific region is recorded in video disc of imprinting again, and deposit in the system storage.Afterwards, when disc player was required to read the file system sector data of the next writing position of foundation in the video disc, disc player judged whether this sector data is file system earlier.If this sector data be file system, then will previous acquired end position in the specific region, replace the next writing position that scans the video disc gained, reading file system, and disk data is recovered; If this sector data is a file system, then directly read the next writing position file system before on the video disc.
In one embodiment of this invention, obtaining before the next writing position that writes data of video disc when last time making video recording, also be included in each engraving data fragment to video disc, the next writing position that is about to data slot is stored in the system storage; And after each data slot imprinting success, with the next writing position imprinting in the system storage to the specific region or nonvolatile memory of video disc.
In one embodiment of this invention, in the specific region of reading video disc, step with the end position of obtaining the data slot of last time successfully making video recording is, read the writing position information in the specific region of video disc earlier, and be temporary in storer, afterwards, read the writing position information in the storer again, to obtain finishing touch writing position next time that is write down in the writing position information.
In one embodiment of this invention, after the next writing position of the finishing touch data that obtain video disc, promptly read its sector data before.Afterwards, judge whether sector data is file system.If sector data be file system, then read specific region or nonvolatile memory in the video disc once more, the end position that is write down when the preceding once successful engraving data with the searching video disc.
In one embodiment of this invention, above-mentionedly judge that whether sector data is that the step of file system is: whether the test zone segment data comprises the identification character.When sector data comprised the identification character, the judgement sector data was a file system; Otherwise, when sector data does not comprise the identification character, judge that then sector data is not file system.If judge that sector data is a file system, the file system that then directly reads these finishing touch data is to recover the data of video disc; If be not file system, then will be previous by the acquired end position in the specific region, replace the next writing position of scanning video disc gained, with the file system of the data slot that reads this end position of correspondence, and disk data is recovered.
In one embodiment of this invention, above-mentioned video disc writes method of data recovery and also comprises after next writing position, continues another data slot of imprinting.
In one embodiment of this invention, above-mentioned video disc writes method of data recovery and also comprises the scanning video disc, writes with the finishing touch from video disc after the next writing position of data, continues another data slot of imprinting.
In one embodiment of this invention, above-mentioned video disc can be the digital audio-video laser disc (Digital VersatileDisk, DVD), the blue light video disc (Blu-ray DVD, BD) or high-resolution digital audio-video laser disc (HDDVD).And the specific region comprises the Lead-In Area (Lead In Area) or the leading-out zone (Lead OutArea) of video disc.
The present invention proposes a kind of video disc and writes method of data recovery, is used for when reading the video disc file system data and make a mistake data being recovered.The method reads out the end position of the data slot that success records earlier, reads file system according to this end position again, so that the data of video disc are recovered.
The present invention is after each engraving data fragment success, just in the specific region of video disc, the end position of record data fragment, in when, outage taking place or make video recording failure when in the imprinting process, disc player just can recover disk data by reading the end position of previous imprinting on the video disc specific region, thereby rescues back the previous data of imprinting on video disc.
For above-mentioned feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 illustrate is the synoptic diagram of known write-once digital audio-video laser disc data.
Fig. 2 be according to shown in the first embodiment of the invention when the synoptic diagram that runs into when outage disk data.
Fig. 3 is the process flow diagram that the video disc that illustrates according to second embodiment of the invention writes method of data recovery.
Fig. 4 is the process flow diagram that the video disc that illustrates according to third embodiment of the invention writes method of data recovery.
Fig. 5 is the process flow diagram that the video disc that illustrates according to fourth embodiment of the invention writes method of data recovery.
Fig. 6 is the process flow diagram that the video disc that illustrates according to fifth embodiment of the invention writes method of data recovery.
Embodiment
In order to make content of the present invention more clear, below the example that can implement according to this really as the present invention especially exemplified by embodiment.In the present invention, the data slot of mentioned successful imprinting also comprises the file system behind the data fragment.
First embodiment
Fig. 2 be illustrate according to first embodiment of the invention when the synoptic diagram that runs into when outage disk data.Please refer to Fig. 2, the video disc of present embodiment is that (Digital Versatile Disk, DVD), the data that write down in the video disc comprise data slot 210,220,230 to the digital audio-video laser disc, and file system 240,250.As shown in Figure 2, when having the imprinting of a data fragment to finish, CD writer promptly can be loaded with the file system of its relevant information in imprinting after this data slot, produces corresponding file system 240,250 respectively as data fragment 210,220.Yet, if when suddenly outage taking place in video disc imprinting process, then except the data slot 230 of present imprinting was not finished, the file system of data slot 230 also had little time to produce, therefore when reading CD next time, will not do because file system and upgrade and reading of data correctly.
General CD writer is divided into the servomechanism installation of front end and coding and decoding device two parts of rear end.After each end engraving data fragment, the servomechanism installation of front end is just with next writing position (the Next Writable Address of data slot, NWA) be temporary in the storer, and after each engraving data fragment success, just the end position with each data fragment is stored in the specific region or nonvolatile memory of video disc.And the specific region of video disc for example is the Lead-In Area or the leading-out zone of video disc, and nonvolatile memory for example comprises Electrically Erasable Read Only Memory (EEPROM).Say further, after judging that this time made video recording to success, the servomechanism installation of front end again with the next writing position imprinting of keeping in the storer to the specific region of video disc or nonvolatile memory and become the end position of this data slot.Therefore, the next writing position of only recording the partial data fragment of success is just understood imprinting to video disc specific region or nonvolatile memory.
With Fig. 2, the next writing position of data slot 210 is " 0x30000 ", and the next writing position of data slot 220 is " 0x40000 ", and the next writing position of data slot 230 is " 0x50000 ".Therefore, the end position that in the specific region of video disc or nonvolatile memory, then comprises " 0x30000 " and " 0x40000 ".And because data slot 230 is not successfully the data slot of imprinting, the end position in the specific region of video disc does not just comprise the next writing position " 0x50000 " of data slot 230.
Therefore, when outage taking place or make video recording failure in the imprinting process, insert again after the video disc, disc player just can recover disk data by the end position of previous imprinting on the video disc specific region again.When below promptly illustrating that for an embodiment reading disk data makes a mistake again according to above-mentioned notion, the detailed step of data reconstruction method.
Second embodiment
Fig. 3 is the process flow diagram that the video disc that illustrates according to second embodiment of the invention writes method of data recovery.Please be simultaneously with reference to Fig. 2 and Fig. 3, present embodiment is when disc player reads disk data and makes a mistake, the method that data are recovered.The method at first is by disc player scanning video disc, to obtain the next writing position (step S310) that N+1 pen in the video disc writes data.Whether afterwards, disc player promptly writes the next writing position of data according to N+1 pen in the video disc, reads its sector data (step S320) before, be file system (step S330) to judge sector data.Wherein, judge that whether sector data is that the mode of file system is by checking whether this sector data comprises the identification character.When judging that this sector data comprises the identification character, judge that promptly sector data is a file system; Otherwise, when judging that sector data does not comprise the identification character, judge that then sector data is not file system.
With Fig. 2 is example, the next writing position that the N+1 pen writes data in the video disc is the tail end (for example " 0x50000 ") of data slot 230, and if data slot 230 is the fragment of successful imprinting, just imprinting is loaded with the file system of its relevant information after it, and the next writing position of this data slot 230 can be by imprinting in the specific region or nonvolatile memory of video disc, and becomes the end position of data slot 230.In view of the above, when disc player is required to read next writing position " 0x50000 ", just judge whether next writing position " 0x50000 " sector data before (for example comprises the identification character, image data identification character ' R ', ' S ', ' A ', ' T '), whether exist with the file system of judgment data fragment 230.If when the last sector data of next writing position " 0x50000 " comprises the identification character, judge that then this sector data is a file system, promptly be that data slot 230 is the imprinting success; Otherwise,, judge that then this sector data is not file system, the failure of data slot 230 imprintings just if do not comprise when recognizing character.
Get back to Fig. 3, in step S330, when judging that sector data is file system, can directly read this data slot corresponding file system, to recover disk data (step S360).Otherwise, if when the sector data in step S330 before the next writing position of judgement is not file system, then read the end position that stores in the specific region of video disc or the nonvolatile memory, with the end position of the data slot of obtaining the N time success of making video recording, for example end position of data slot 220 " 0x40000 " (step S340).With practical application, disc player can when reading video disc, be temporary in this end position earlier in the storer initial, have after treating need read before (for example, the N time, the N-1 time, the N-2 time several times ...) end position the time, can directly from storer, read.
Then, after the end position of the data slot 220 of obtaining the success of last time making video recording, disc player promptly replaces the next writing position " 0x50000 " of the data slot 230 of scanning video disc gained with this end position " 0x40000 ", and read the preceding file system of end position " 0x40000 ", and recover the data (step S350) of video disc.In other words, the script disc player should read the file system of next writing position " 0x50000 " and recover disk data, but, thereby replace the end position " 0x40000 " that reads in specific region or the nonvolatile memory and look for and read file system because next writing position " 0x50000 " sector data before is not file system.
It should be noted that in the present embodiment, if desire continues this video disc of imprinting, then disc player just self-scanning video disc gained next writing position " 0x50000 " afterwards, continue another data slot of imprinting.That is to say,, also can in the video disc normal region, continue engraving data even data slot 230 imprintings are imperfect.
Yet in daily life, video disc also may be because of outside destroy (as scratch) or itself bad, causes wherein that the partial data fragment can't read, and at this moment, utilizes end position, promptly can read int data in the video disc.Below again for an embodiment explanation.
The 3rd embodiment
Fig. 4 is the process flow diagram that the video disc that illustrates according to third embodiment of the invention writes method of data recovery.Please be simultaneously with reference to Fig. 2 and Fig. 4, the step S410 of present embodiment～S440 is as step S310～S340 of above-mentioned second embodiment.At first obtain (step S410) behind the next writing position that N+1 pen in the video disc writes data at disc player scanning video disc, disc player is promptly according to this next writing position, whether read its sector data (step S420) before, be file system (step S430) to judge sector data.If judge when being not file system, then read the end position of the data slot of the N time success of making video recording that stores in the specific region of video disc or the nonvolatile memory, to replace the next writing position (step S440) that the former N+1 pen that should read of disc player writes data.Otherwise, if when being judged to be file system, just directly read the file system of N+1 data, to recover disk data (step S470).
Present embodiment and the above-mentioned second embodiment difference are, behind step S440, comprise also whether the sector data before the end position of judgement data slot of last time recording success of institute's imprinting in video disc specific region or nonvolatile memory is file system (step S450).If judge that the area data of end position is not a file system, then return step S440, read this video disc specific region or nonvolatile memory once more, to seek the end position of this video disc the N-1 time successful data recording fragment.That is to say, in the time of can't reading if the file system of the data slot of the previous imprinting success of video disc is damaged, just read in the end position that writes down in video disc specific region or the nonvolatile memory once more, looking for the end position that this video disc is write down when the success of the N-1 time engraving data forward, thereby read unspoiled file system and pairing data slot thereof in the video disc; By that analogy, when the file system as if the N-1 time also can't read because of factors such as video disc defectives, just continue to look for the end position of the success time institute imprinting of making video recording for the N-2 time forward.
In step S450, when the sector data before the end position obtained in the positional information of video disc specific region or nonvolatile memory is file system, then read the next writing position that this end position replaces scanning video disc gained, reading file system, and recover disk data (step S460) to data slot that should end position.
With Fig. 2, obtaining next writing position " 0x40000 " afterwards, to judge further whether its sector data is file system, if, then write the next writing position " 0x50000 " of data with finishing touch in this next writing position " 0x40000 " replacement video disc, read file system, and recover disk data.In the time of can't reading if damage takes place the file system of next writing position " 0x40000 " 250, just read the end position that writes down in video disc specific region or the nonvolatile memory once more, look for the end position " 0x30000 " that this video disc is write down forward when preceding once successful engraving data, thereby read this next writing position " 0x30000 " file system before.
In sum, the foregoing description can recover all the other unspoiled disk datas when reading of data makes a mistake by the end position in video disc specific region or nonvolatile memory.On the other hand, the present invention also can omit the action of above-mentioned scanning video disc, serves as according to reading file system with the writing position information of previous imprinting directly, below again for an embodiment explanation.
The 4th embodiment
Fig. 5 is the process flow diagram that the video disc that illustrates according to fourth embodiment of the invention writes method of data recovery.Please be simultaneously with reference to Fig. 2 and Fig. 5, in the present embodiment, the end position (step S510) of disc player for storing in the specific region of directly reading video disc or the nonvolatile memory, and read file system according to end position, recover the data (step S520) of video disc.In other words, because the end position that writes down in the specific region of video disc or nonvolatile memory all is successfully the next writing position of the data slot of imprinting, therefore, present embodiment is promptly directly taken these correct next writing positions and is read file system, has omitted the action of scanning video disc.
For instance, with Fig. 2,, therefore, only write down the end position of data slot 210 and data slot 220 in the writing position information in video disc Lead-In Area or leading-out zone or the nonvolatile memory because data slot 230 is not successfully imprinting.Disc player just directly reads writing position information when reading disk data, the end position " 0x40000 " to obtain data slot 220 recovers disk data and read file system 250, thereby accelerates the speed of reading of data.
It should be noted that if desire continues this video disc of imprinting then disc player is that the finishing touch of self-scanning video disc gained writes after the next writing position of data, continues another data slot of imprinting.With Fig. 2, promptly be to continue the engraving data fragment with next writing position " 0x50000 ".
In addition,, when causing that the partial data fragment can't read in the video disc, utilize writing position information, can recover int data in the video disc equally when video disc generation scratch or situation such as stained.
The 5th embodiment
Fig. 6 is the process flow diagram that the video disc that illustrates according to fifth embodiment of the invention writes method of data recovery.Please refer to Fig. 6, at first, disc player directly reads the end position (step S610) that stores in the specific region of video disc or the nonvolatile memory.
Present embodiment and above-mentioned the 4th embodiment difference are, after obtaining end position, comprise also whether the sector data of judging this end position is file system (step S620).If then read file system, to recover disk data (step S630) according to this end position; Otherwise, if judge that the data of end position are not file system, that is be that the data slot of the previous imprinting success of video disc damage takes place and can't read the time, then return step S610, read the end position that writes down in video disc specific region or the nonvolatile memory once more, look for the end position that this video disc is write down forward when preceding once successful engraving data, thereby read unspoiled data slot in the video disc.
With Fig. 2 is example, after the sector data that reads next writing position " 0x40000 ", judges promptly whether it is file system.If, just read file system with next writing position " 0x40000 ", and recover disk data.In the time of can't normally reading if damage takes place file system 250, then continue to read one by one the end position " 0x30000 " that is write down in video disc or the nonvolatile memory forward, same and judge whether the sector data of end position " 0x30000 " is file system, by that analogy.
In sum, the present invention replaces the next writing position of scanning video disc gained by the end position that will write down in the specific region when reading disk data and make a mistake, and reads file system and recovers disk data.Perhaps, also can when reading video disc, directly from video disc specific region or nonvolatile memory, obtain end position, read file system, to accelerate to read the speed and the correctness of video disc.
Though the present invention discloses as above with preferred embodiment; but be not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; can do a little change and retouching, so protection scope of the present invention is as the criterion with the content of claims.
Claims (13)
1. a video disc writes method of data recovery, is used for recovering this data when data that read a video disc make a mistake, and this method comprises:
Scan this video disc, to obtain a next writing position of finishing touch data slot in this video disc;
Read a next writing position sector data before of this finishing touch data slot;
Judge whether this sector data is a file system;
If this sector data is a file system, then read this document system to recover the data of this video disc;
If this sector data is not this document system, a stored end position when then reading last time successful data recording fragment; And
The next writing position that replaces described finishing touch data slot with this end position reads this document system, to recover the data of this video disc.
2. the method for claim 1 is characterized in that, comprising:
After successful data recording fragment, the end position of this success data recording fragment is stored in the specific region or a nonvolatile memory of this video disc.
3. method as claimed in claim 2 is characterized in that, wherein this specific region comprises a Lead-In Area or a leading-out zone, and this nonvolatile memory comprises an Electrically Erasable Read Only Memory.
4. method as claimed in claim 2 is characterized in that, before successfully recording this data slot, also comprises:
After each imprinting finishes, the next writing position of this data slot is temporary in the storer.
5. method as claimed in claim 2 is characterized in that, wherein reads after the step of this end position of this success data recording fragment, comprising:
Read this writing position next time this sector data before;
Judge whether this sector data is file system; And
If this sector data is a file system, then read this document system to recover the data of this video disc;
If this sector data is not this document system, then read this specific region or this nonvolatile memory once more, to seek an end position of another successful data recording fragment.
6. the method for claim 1 is characterized in that, judges that wherein whether this sector data is the step of file system, comprising:
Check whether this sector data comprises an identification character;
When this sector data comprises this identification character, judge that this sector data is a file system; And
When this sector data does not comprise this identification character, judge that this sector data is not this document system.
7. the method for claim 1 is characterized in that, also comprises:
After this of the finishing touch data slot of this video disc writing position, continue another data slot of imprinting next time.
8. the method for claim 1 is characterized in that, wherein this video disc comprises one of digital audio-video laser disc, Blu-ray Disc or high-resolution digital audio-video laser disc.
9. a video disc writes method of data recovery, is used for recovering this data when data that read a video disc make a mistake, and this method comprises the following steps:
Read out successfully an end position of data recording fragment; And
Read a file system according to this end position, to recover the data of this video disc;
Wherein, before reading this end position of this data slot, also comprise:
Each finish this data slot of imprinting after, this end position of this data slot is temporary in the storer; And
After this data slot success imprinting, with this temporary in this storer end position imprinting to the specific region or described nonvolatile memory of this video disc.
10. method as claimed in claim 9 is characterized in that, wherein reads after this end position of this data slot, also comprises:
Read an end position sector data in the past of this data slot;
Judge whether this sector data is file system;
If this sector data is a file system, then read this document system to recover the data of this video disc;
If this sector data is not this document system, then read specific region or this nonvolatile memory of this video disc once more, to seek another end position that this video disc is write down when the successful engraving data fragment last time.
11. method as claimed in claim 10 is characterized in that, judges that wherein whether this sector data is the step of file system, comprising:
Check whether this sector data comprises an identification character;
When this sector data comprises this identification character, judge that this sector data is a file system; And
When this sector data does not comprise this identification character, judge that this sector data is not this document system.
12. method as claimed in claim 9 is characterized in that, wherein this specific region comprises a Lead-In Area or a leading-out zone of this video disc, and this nonvolatile memory comprises an Electrically Erasable Read Only Memory.
13. method as claimed in claim 9 is characterized in that, wherein this video disc comprises one of digital audio-video laser disc, Blu-ray Disc or high-resolution digital audio-video laser disc.
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| CN2007103006739A CN101206895B (en) | 2007-12-19 | 2007-12-19 | Method for recuperation of disk writen data |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1337702A (en) * | 2000-07-14 | 2002-02-27 | 索尼公司 | Method and apparatus for recording data and recording/reproducing data, disc-shape recoding medium |
| CN101211626A (en) * | 2006-12-25 | 2008-07-02 | 上海乐金广电电子有限公司 | Optic disc device data recording control method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1337702A (en) * | 2000-07-14 | 2002-02-27 | 索尼公司 | Method and apparatus for recording data and recording/reproducing data, disc-shape recoding medium |
| CN101211626A (en) * | 2006-12-25 | 2008-07-02 | 上海乐金广电电子有限公司 | Optic disc device data recording control method |
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