CN1261882C - Method and system for updating storaged mapping flag in optical storage medium - Google Patents
Method and system for updating storaged mapping flag in optical storage medium Download PDFInfo
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- CN1261882C CN1261882C CNB021471649A CN02147164A CN1261882C CN 1261882 C CN1261882 C CN 1261882C CN B021471649 A CNB021471649 A CN B021471649A CN 02147164 A CN02147164 A CN 02147164A CN 1261882 C CN1261882 C CN 1261882C
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Abstract
The present invention relates to a method and a system for updating stored direct mapping flags of a data area in an optical storage medium. An optical storage medium comprises a plurality of broken management areas and a broken storage table, wherein the broken management areas are orderly arranged and numbered; each broken management area comprises a data area and a replacement area; Both each data area and each replacement area comprise a plurality of area blocks which can be used for storing digital data; each area block is provided with corresponding address information for distinguishing; the broken storage table comprises a plurality of broken table area blocks; each broken table area block is orderly arranged and numbered and is corresponding to one of the broken management areas; a direct mapping flag and a plurality of storage columns of preset number are stored in each broken table area block; the storage columns are corresponding to a plurality of area blocks of the replacement areas; when relevant data of all broken area blocks in a certain data area are stored in the broken table area block corresponding to the data area, the direct mapping flag can be set in a first state, and or else, the direct mapping flag is set in a second state.
Description
Technical field
The present invention is about a kind of method of updated stored data, refer to especially a kind of in optic storage medium the update method of mapping flag.
Background technology
Have one on the known CD and damage storage list (Defect Table, DT), make CD-ROM device when writing the damage block of recording or reading on the CD, can utilize this damage storage list to search alternative block.Thereby it is more reliable that more traditional the rewritten formula laser disc of CD-RW is used.
Ask for an interview Fig. 1, Fig. 1 is the file planar configuration synoptic diagram of known CD 10.CD 10 includes 64 damage management area (not shown)s (Defect Management Area) of arranging in proper order, at most mainly to be damaged storage list (Main Defect Table), and one second damages storage list (SecondDefect Table), is stored in introducing district (Lead-inArea) 12, and the step district (Program Area) 14 of outer ring of CD 10 center sections 16, inner ring respectively.
Each is damaged the management area and all comprises a data area (Data Area) and a substitute zone (SpareArea).Thereby CD 10 is to comprise maximum 64 data zones (Data Area) and 64 substitute zones respectively.Known this data area includes 4352 blocks and can be used to store numerical data.And this bench area includes 256 blocks, when damaging in order to the block in the data area, and substitute storage numerical data.Each block all is composed of a corresponding address information for distinguishing.
These second damage storage list data are to copy from this main damage table, in this collectively one damage storage list (Defect Table).Damage storage list 18 and include maximum 8 packets 19.Include 4 groups of damage list area piece groups 22,24,26,28 of arranging according to certain particular order in each packet 19, damaging for every group has 8 damage list area pieces 20 in the list area piece group 22,24,26,28.These 4 groups are damaged list area piece group is 8 data of damaging list area piece 20 of repeated storage.Therefore, damage storage list 18 and altogether include maximum 64 damage list area pieces 20 respectively with respect to maximum 64 bench areas of damaging in the management areas.The storage field 30 that each damage list area piece 20 includes a plurality of predetermined numbers corresponds to 256 blocks in this substitute zone one by one.Described storage field is in order to the substitute address information of the data area damage block stored of the store status of the block of the corresponding bench area of storage institute and institute.
All meet with to damage the related data of block in a certain data area, when all being stored in corresponding with this data area in this damage storage list damage list area piece, are called direct mapping, are non-direct mapping otherwise be called.
Whether each is damaged in the piece of list area has a mapping flag 32 in addition, be direct mapping in order to indication institute corresponding substitute zone.Known this mapping flag that will determine need be checked the address information that block is damaged in all storage fields 30 are stored in this damage list area piece data area whether when directly shining upon one by one.Yet known method is quite lost time.
Therefore, fundamental purpose of the present invention be to provide a kind of in optic storage medium the update method and the system of institute's Storage Mapping flag, to address the above problem.
Summary of the invention
Fundamental purpose of the present invention is in that a kind of method and system of upgrading institute's Storage Mapping flag in optic storage medium are provided, to solve the problem of known technology.
With best specific embodiment explanation, the present invention provides a kind of in an optic storage medium, for example in the CD, the direct mapping flag of the data area of being stored is carried out method for updating and system.This optic storage medium includes a plurality of damages management area (Defect Management Area) and and damages storage list (Defect Table).Described damage management area is to arrange in proper order and number.Each is damaged the management area and comprises a data area (Data Area) and a substitute zone (Spare Area).Each data area and substitute zone all include a plurality of blocks and can be used to store numerical data.Respectively this block all has a corresponding address information for distinguishing.This damage storage list include a plurality of damages list area piece (Defect Table Block, DTB).Respectively this damage list area piece is arranged in proper order and is numbered, and damages a bench area of management area with respect to this.Each damages the storage field that the list area piece stores a direct mapping flag and a plurality of predetermined numbers.Described storage field corresponds to a plurality of blocks of this bench area one by one.All meet with to damage the related data of block in a certain data area, and when all being stored in corresponding with this data area damage list area piece, this direct mapping flag can be set at one first state, otherwise can be set at one second state.Mapping flag update method of the present invention determines to damage described in this damage storage list the order to be checked of list area piece according to a predetermined block order deciding step.Then check one by one according to this order to be checked whether any storage field of having stored that is denoted as is arranged in the piece of described damage list area.Then check step with predetermined field, checks the described storage field of having stored, to obtain the numbering of wherein being stored the damage management area under round damage block.Utilize obtained numbering at last, whether decision upgrades direct mapping flag is this second state.
The present invention utilizes a predetermined field to check step, check the storage field of having stored described in this damage list area piece, meet with to damage an initial data area numbering and a final data zone number under the block to obtain wherein to be stored, and obtain the number of institute's inclusion region in this initiation region and this final area.At last, except the damage list area piece of present inspection, this direct mapping flag that is stored in the corresponding damage of this zone number list area piece respectively is updated to non-direct mapping status.Utilize the present invention, can save known method and must search one by one the spent time of address information of storing in the field, and can effectively promote the correctness of direct mapping flag.
Can utilize the following detailed description and accompanying drawings to be further understood about the advantages and spirit of the present invention.
Description of drawings
Fig. 1 is the file planar configuration synoptic diagram of known CD.
Fig. 2 is the synoptic diagram of optical disc data memory block of the present invention.
Fig. 3 utilizes one of update method of the present invention to damage list area piece synoptic diagram.
Fig. 4 is the synoptic diagram of a specific embodiment of the present invention.
Fig. 5 is the mac function figure of the direct mapping flag update system of the present invention.
The reference numeral explanation
40 damage 42 data areas, management area
Storage list is damaged in 44 bench areas 46
48 damage list area piece 50 storage fields
50a, 50b unit 52 direct mapping flags
54 have used storage field zone
56 can use but idle storage field zone
58 can not use storage field zone
The initial field 60f that stored of 60i has finally stored field
100 direct mapping flag update system
102 judge memory unit 104 flag set parts
106 orders determine parts 108 checking/updating parts
Embodiment
The present invention provides a kind of direct mapping flag to the data area of being stored in the optic storage medium and carries out method for updating and system.This optic storage medium can be a CD-RW (CompactDisk-ReWritable) CD.
See also Fig. 2.Fig. 2 is the synoptic diagram of optical disc data memory block of the present invention.On a formative CD-RW CD, include a plurality of damages management area 40 (Defect Management Area) and and damage storage list 46 (Defect Table).Damaging management area 40 is to arrange and be numbered A, B, C, D, E in proper order.Respectively this damage management area 40 comprises a data area 42 (Data Area) and a substitute zone 44 (Spare Area), and both all include a plurality of blocks and can be used to store numerical data.This block and be composed of a corresponding address information for distinguishing respectively.Damage storage list 46 comprise a plurality of damages list area piece 48 (Defect Table Block, DTB).Damaging list area piece 48 is to arrange and be numbered a, b, c, d, e in proper order.
See also Fig. 3, Fig. 3 utilizes one of update method of the present invention to damage list area piece 48 synoptic diagram.Respectively this damage list area piece is to damage the management area with respect to one in this optic storage medium, and stores storage field 50 and a direct mapping flag 52 of a plurality of predetermined numbers.Storage field 50 corresponds to a plurality of blocks of this bench area one by one.The a collection of numerical data of a predetermined block in originally should being stored in a certain this data area, when being stored in separately the block of a confession substitute in a certain this bench area through judging this predetermined block to be damaged, related data can be stored in the storage field 50 of a certain damage list area piece 48 in this damage storage list.Then will store field 50 and be denoted as and store, and be arranged in regular turn and damage in the list area piece 48.
Each storage field 50 is for having 6 bytes, can dividing into 2 unit 50a and 50b.The related data that 3 bytes of unit 50a are stored is this address information of having been damaged block.The related data that 3 bytes of unit 50b are stored is the address information of this corresponding substitute block, has been damaged the address information of block according to this, can pick out the numbering of the affiliated damage management area of this block.Damage the store status of block in the bench area that list area piece 48 continues according to storage field institute correspondence, can divide into three regions: the first, use 54 expressions of storage field zone wherein to store the corresponding substitute block of field and may replace the indicated block stores in unit that numerical data is arranged; The second, can use but the idle storage field zone corresponding substitute block of 56 expressions is not stored with numerical data; The 3rd, can not use 58 expressions corresponding substitute block in storage field zone unavailable with the storage numerical data.In the related data of a damage of new adding block, the storage field in this damage list area piece can be stored this address information of having been damaged block that unit 50a stores in the field 50 according to each and resequence.The described storage field definable of arranging in regular turn of having stored goes out an initial field 60i and that stored and has finally stored field 60f.And wherein store the numbering that suffers the damage management area that the address information under the damage block identifies according to institute in the storage field 50, correspondingly be defined as an initial zone number and a final area is numbered.
All are damaged the related data of block in a certain data area, when all being stored in corresponding with this data area in this damage storage list damage list area piece, damage the direct mapping flag 52 of storing in the list area piece 48 and can be set at one first state, i.e. directly mapping (straight mapping), otherwise can be set at one second state, i.e. non-direct mapping (non-straight mapping).Directly mapping flag 52 is the storage field of a hyte, wherein the storage space of (bit) is used to refer to corresponding data area and is damaged the related data of block and whether all be stored in corresponding damage list area piece, directly be stored as 1 during mapping, be stored as 0 during non-direct mapping.When a damage list area piece was directly mapping, the situation that corresponding damage list area, data area piece is learnt replacement can be directly searched in expression.
See also Fig. 4, Fig. 4 is a flow chart of steps of update method of the present invention.When this optic storage medium was not yet stored any numerical data, the direct mapping flag of storing in all described damage list area pieces all was preset as first state.As for damaging when not comprising any storage field of having stored in the piece of list area when one, then do not change the state of this direct mapping flag of being stored in this damage list area piece, and continue in proper order the next list area piece of damaging in this damage storage list is checked according to an examine.This update method comprises the following step:
Step S50: beginning;
Step S52: according to a predetermined block order deciding step, namely according to the number order of described damage list area piece, decide and damage piece order to be checked in list area described in this damage storage list;
Step S54: according to this order to be checked that step S52 determines out, in this damage storage list, described damage list area piece is carried out a predetermined block one by one and check step;
Step S54: check whether any storage field of having stored that is denoted as is arranged in this damage list area piece;
Step S56: check step with a predetermined field, check the storage field of having stored described in this damages list area piece, to obtain the related data of wherein being stored under round damage block;
Step S58: in present this damage list area piece of checking, store the address information in the related data, obtain this initiation region numbering and this final area numbering respectively;
Step S60: check in regular turn the address information that other storage fields of having stored are stored in this damage list area piece, to find out the All Ranges numbering that comprises in this initiation region numbering and this final area Serial Number Range;
Step S62: utilize obtained related data, determine whether this direct mapping flag that stores in the corresponding damage list area piece is updated to non-direct mapping;
Step S64: finish.
Wherein step S62 is the All Ranges numbering of finding out for step S60, one by one this direct mapping flag that stores in the corresponding damage list area piece is updated to this second state, except present this damage list area piece that checks.
Get back to Fig. 2.The update method of this patent is described with a specific embodiment below.Damage list area piece a, b, c, d, e, correspond respectively to and damage management area A, B, C, D, E.After this update method began, foundation was damaged the number order of list area piece, namely began from damaging list area piece a, continues damage list area piece b, c, d, e are carried out a predetermined block inspection step one by one.Check to damage whether storage field 50 has any storage field of having stored that is denoted as among the piece a of list area.If damage when not comprising any storage field 50 of having stored among the piece a of list area, do not change and the state of damaging the corresponding direct mapping flag of management area A, and then check damaging list area piece b.
Check the storage field 50 of having stored of damaging among the piece b of list area, and obtain wherein to store and damaged the affiliated related data of block.Store address information in the related data according to damaging the storage field 50 of having stored among the piece b of list area, obtain respectively an initial zone number and a final area and number.If the address information of storing among the damage list area piece b represents the initiation region and is numbered data area B, final area is numbered data area E.Check in regular turn and damage the address information that other storage fields of having stored are stored among the piece b of list area.Utilize this address information to find out to be contained in initiation region numbering B and the All Ranges in the final area numbering E scope to number.If check that the result who damages list area piece b is for including in addition the address information of block among the C of data area between initiation region and final area.Except the present damage list area piece b that checks, upgrading one by one the corresponding direct mapping flag 52 of damage management area C, E is 0, i.e. non-direct mapping.
According to the definition of direct mapping, all meet with to damage the related data of block in a certain data area, when all being stored in this damages storage list with corresponding damage list area, this data area piece for directly shining upon.Therefore with present embodiment, the information of damaging block among data area C, the E all is stored in and is directly mapping when substituting zone C, E.But also find the data of promising data area C, E substitute storage in the B of bench area, therefore damaging management area C, E is non-direct mapping.Thereby the corresponding direct mapping flag of change data area C, E is non-direct mapping.Then to check that step finds that other damage in the field of storage among list area pieces such as c, d, the e as for damaging management area B at other damage list area piece, when having the address information that belongs to data area B, just the corresponding direct mapping flag of updatable data area B should be 0, promptly non-direct mapping.If check out the storage field among damage list area piece such as c, d, the e, find no the address date that belongs to data area B, the direct mapping flag of then damaging list area piece b then can not be updated to second state 0, still is maintained at first state 1, i.e. directly mapping.
See also Fig. 5, Fig. 5 is the mac function figure of direct mapping flag update system 100 of the present invention.Update system 100 can be a CD-ROM device, includes one and judges a memory unit 102 and a flag set parts 104.The a collection of numerical data of a predetermined block in originally should being stored in a certain data area 42, when being damaged the block that should be stored in separately a confession substitute in a certain bench area 44 because of this predetermined block, judge that memory unit 102 can be with related data as damaging the address information of block ... Deng, be stored in the storage field 50 of damaging a certain damage list area piece 48 in the storage list 46, and should store field and be denoted as and store and be arranged in regular turn in the damage list area piece 48.
Flag set parts 104 is in order to set the state of damaging the direct mapping flag 52 of storing in the list area piece 48.For example, all are damaged the related data of block in the B of data area, all be stored in when damaging in the storage list 46 with the corresponding damage of data area B list area piece b, setting and damaging the direct mapping flag of being stored among the piece b of list area is directly mapping of first state, 1 representative, otherwise is set at the non-direct mapping of second state, 0 representative.Flag set parts 104 includes an order and determines parts 106 and an inspection/updating component 108.Order determines that parts 106 are according to a predetermined block order deciding step, decides in the step of upgrading direct mapping flag, checks and damages the order of damaging list area piece 48 in the storage list 46.Checking/updating parts 108 is according to this determine parts in proper order this order to be checked of determining out, carries out one by one a predetermined block and checks step damaging list area piece 48.Wherein, this block checks step is that checking/updating parts 108 checks earlier to damage in the list area piece 48 whether any storage field of having stored that is denoted as is arranged.Then, checking/updating parts 108 checks step with a predetermined field, in this present damage list area piece, check the address information that the storage field stored described in this damage list area piece is stored, wherein stored the related data of meet with damaging under the block, the address information of namely damaging block in the data area 42 to obtain.Then obtain respectively an initial zone number and final area numbering.Checking/updating parts 108 checks in regular turn damages the address information that other storage fields of having stored are stored in the piece 48 of list area, to find out the All Ranges numbering that is contained in this initiation region numbering and this final area Serial Number Range.At last, checking/updating parts 108 is utilized the All Ranges numbering, except present this damage list area piece that checks, one by one this corresponding direct mapping flag is updated to this second state.
With the method for the direct mapping flag of known setting with, the present invention utilizes a predetermined field to check step, check the storage field of having stored described in this damage list area piece, meet with to damage an initial data area numbering and a final data zone number under the block to obtain wherein to be stored, and obtain the number of institute's inclusion region in initiation region and the final area.At last, the data area under the damage list area piece of present inspection, respectively corresponding this direct mapping flag of this zone number is updated to this non-direct mapping status.Utilize the present invention, can save known method and must search one by one the spent time of address information of storing in the field, and can effectively promote the correctness of direct mapping flag.
Utilize the above detailed description of preferred embodiments, being that hope is more clear describes feature of the present invention and spirit, and is not to come category of the present invention is limited with above-mentioned disclosed preferred embodiment.On the contrary, its objective is that hope contains in the scope that is arranged in claim of the present invention of various changes and tool equivalence.
Claims (18)
1. method that the direct mapping flag of the data area of storing in the optic storage medium is upgraded, this optic storage medium includes a plurality of damage management areas of arranging and being numbered in proper order, respectively this damage management area comprises a data area and a bench area, both all include a plurality of blocks and can be used to store numerical data, and this block and be composed of a corresponding address information for distinguishing respectively, this optic storage medium includes in addition one and damages storage list, include a plurality of damage list area pieces of arranging and being numbered in proper order, respectively this damage list area piece is to damage the management area with respect to one in this optic storage medium, and storing the storage field of a direct mapping flag and a plurality of predetermined numbers, described storage field also corresponds to a plurality of blocks of this bench area one by one; The a collection of numerical data of a predetermined block in originally should being stored in a certain this data area, when being stored in separately the block of a confession substitute in a certain this bench area through judging this predetermined block to be damaged, related data can be stored in the storage field of a certain this damage list area piece in this damage storage list, and should store field and be denoted as and store, and be arranged in regular turn in this damage list area piece; All are damaged the related data of block in a certain data area, when all being stored in corresponding with this data area in this damage storage list damage list area piece, this direct mapping flag of storing in this damage list area piece can be set at one first state, otherwise can be set at one second state
This update method comprises the following step:
A. according to a predetermined block order deciding step, decide the order of damaging list area piece examine described in this damage storage list; And
B. this order to be checked that foundation determined is out carried out one by one a predetermined block to described damage list area piece and is checked step in this damage storage list, this block checks that step comprises:
B1. check whether any storage field of having stored that is denoted as is arranged in this damage list area piece;
B2. check step with a predetermined field, check the storage field of having stored described in this damages list area piece, to obtain the related data of wherein being stored under round damage block; And
B3. utilize obtained related data, determine whether this corresponding direct mapping flag is updated to this second state.
2. update method as claimed in claim 1, wherein the related data of being stored in this storage field is the address information that comprises this address information of having been damaged block and this corresponding substitute block, damaged the address information of block according to this, can have been picked out the numbering of the affiliated damage management area of this block.
3. update method as claimed in claim 2 is wherein damaged for one round in the related data of block in new adding, and the storage field of this damages list area piece can be resequenced according to this address information that damaged block.
4. update method as claimed in claim 1, block order deciding step that wherein should be predetermined is the number order according to described damage list area piece, decides the order to be checked of damage list area piece described in this damages storage list.
5. update method as claimed in claim 1, wherein when this optic storage medium was not yet stored any numerical data, the direct mapping flag of storing in all described damage list area pieces all was preset as this first state.
6. update method as claimed in claim 1, wherein when not comprising any storage field of having stored in this damage list area piece, then do not change the state of this direct mapping flag of being stored in this damage list area piece, and continue in proper order the next list area piece of damaging in this damage storage list is checked according to this examine.
7. update method as claimed in claim 3, the wherein said storage field definable of arranging in regular turn of having stored goes out an initial field and of having stored and has finally stored field, and wherein according to the numbering of the damage management area that address information picked out under the store round damage block, a corresponding initial zone number and the final area numbering of being defined as.
8. update method as claimed in claim 7, wherein should check that step comprised by predetermined field:
Institute's address stored information in present this damage list area piece of checking obtains this initiation region numbering and this final area numbering respectively;
Check in regular turn the address information that other storage fields of having stored are stored in this damage list area piece, to find out the All Ranges numbering that is contained in this initiation region numbering and this final area Serial Number Range;
For the above-mentioned All Ranges numbering of finding out, one by one this corresponding direct mapping flag is updated to this second state, except present this damage list area piece that checks.
9. update method as claimed in claim 1, wherein this optic storage medium is a CD-RW.
10. system that the direct mapping flag of the data area of storing in the optic storage medium is upgraded, this optic storage medium includes a plurality of damage management areas of arranging and being numbered in proper order, respectively this damage management area comprises a data area and a bench area, both all include a plurality of blocks and can be used to store numerical data, and this block and be composed of a corresponding address information for distinguishing respectively, this optic storage medium includes in addition one and damages storage list, include a plurality of damage list area pieces of arranging and being numbered in proper order, respectively this damage list area piece is to damage the management area with respect to one in this optic storage medium, and store the storage field of a direct mapping flag and a plurality of predetermined numbers, described storage field also corresponds to a plurality of blocks of this bench area one by one, and this update system comprises:
One judges memory unit, the a collection of numerical data of a predetermined block in originally should being stored in a certain this data area, because of this predetermined block is damaged the block that should be stored in a confession substitute in a certain this substitute zone separately, this judgement memory unit can be stored in related data in the storage field of a certain this damage list area piece in this damage storage list, and should store field and be denoted as and store, and be arranged in regular turn in this damage list area piece; And
One flag set parts, in order to set the state of this direct mapping flag of being stored in this damage list area piece, all are damaged the related data of block in a certain data area, when all being stored in this damage storage list with corresponding damage list area, this data area piece, setting the direct mapping flag of being stored in this damage list area piece is one first state, otherwise is set at one second state; This flag set parts includes:
One order determines parts, according to a predetermined block order deciding step, decides the order of damaging list area piece examine described in this damage storage list; And
One inspection/updating component according to this determine parts in proper order this examine order of determining out, is carried out a predetermined block inspection step to described damage list area piece one by one in this damages storage list;
Wherein, this checking/updating parts is to carry out this block with the following step to check step:
Check whether any storage field of having stored that is denoted as is arranged in this damage list area piece;
Check step with a predetermined field, check the storage field of having stored described in this damages list area piece, to obtain the related data of wherein being stored under round damage block; And
Utilize obtained related data, this corresponding direct mapping flag is updated to this second state.
11. system as claimed in claim 10, wherein the related data of being stored in this storage field is the address information that comprises this address information of having been damaged block and this corresponding substitute block, wherein damaged the address information of block, can have been picked out the numbering of this affiliated damage management area of this block according to this.
12. system as claimed in claim 11 wherein damages in the related data of block in new adding one round, the storage field of this damages list area piece can be resequenced according to this address information that damaged block.
13. system as claimed in claim 10, block order deciding step that wherein should be predetermined is the number order according to described damage list area piece, decides and damages piece order to be checked in list area described in this damage storage list.
14. system as claimed in claim 10, wherein when this optic storage medium was not yet stored any numerical data, this checking/updating parts can all be preset as this first state with the direct mapping flag of storing in all described damage list area pieces.
15. system as claimed in claim 10, wherein when not comprising any storage field of having stored in this damage list area piece, this inspection/updating component can not changed the state of the direct mapping flag of being stored in this damage list area piece, and continues in proper order the next list area piece of damaging in this damage storage list is checked according to this examine.
16. system as claimed in claim 12, damage in the piece of list area in this, the described storage field definable of arranging in regular turn of having stored goes out an initial field and of having stored and has finally stored field, and wherein according to the numbering of the store damage management area that address information picked out of being damaged block, a corresponding initial zone number and the final area numbering of being defined as.
17. system as claimed in claim 16 wherein should check that step comprised by predetermined field:
Institute's address stored information in present this damage list area piece of checking obtains this initiation region numbering and this final area numbering respectively;
Check in regular turn the address information that other storage fields of having stored are stored in this damage list area piece, to find out the All Ranges numbering that is contained in this initiation region numbering and this final area Serial Number Range;
For the above-mentioned All Ranges numbering of finding out, one by one this corresponding direct mapping flag is updated to this second state, except present this damage list area piece that checks.
18. system as claimed in claim 10, wherein this optic storage medium is a CD-RW.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021471649A CN1261882C (en) | 2002-10-24 | 2002-10-24 | Method and system for updating storaged mapping flag in optical storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021471649A CN1261882C (en) | 2002-10-24 | 2002-10-24 | Method and system for updating storaged mapping flag in optical storage medium |
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| Publication Number | Publication Date |
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| CN1492333A CN1492333A (en) | 2004-04-28 |
| CN1261882C true CN1261882C (en) | 2006-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021471649A Expired - Fee Related CN1261882C (en) | 2002-10-24 | 2002-10-24 | Method and system for updating storaged mapping flag in optical storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105837526A (en) * | 2016-01-22 | 2016-08-10 | 浙江工业大学 | Preparation method of important intermediate (2S, 3R)-4-benzyl-3-(4-fluorophenyl)morpholine-2-ol for aprepitant synthesis |
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2002
- 2002-10-24 CN CNB021471649A patent/CN1261882C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105837526A (en) * | 2016-01-22 | 2016-08-10 | 浙江工业大学 | Preparation method of important intermediate (2S, 3R)-4-benzyl-3-(4-fluorophenyl)morpholine-2-ol for aprepitant synthesis |
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| Publication number | Publication date |
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| CN1492333A (en) | 2004-04-28 |
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