CN102087635B - Data processing method and system - Google Patents
Data processing method and system Download PDFInfo
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- CN102087635B CN102087635B CN 200910252677 CN200910252677A CN102087635B CN 102087635 B CN102087635 B CN 102087635B CN 200910252677 CN200910252677 CN 200910252677 CN 200910252677 A CN200910252677 A CN 200910252677A CN 102087635 B CN102087635 B CN 102087635B
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Abstract
The invention relates to a data processing method and system and a storage device controller. In the method, firstly, providing a storage device coupled to a host; issuing a write-in instruction including a logic access address and first data to the storage device by the host and judging whether the logic access address to be written in the host is one of logic access addresses of file system information; and writing second data into the storage device by the storage device in preset time when the logic access address to be written in the host is one of the logic access addresses of the file system information, wherein the second data is different from first data.
Description
Technical field
The present invention relates to a kind of data processing method, particularly relate to a kind of data processing method, system and storage device controller of guaranteeing the storage device specificity.
Background technology
Along with USB (universal serial bus) (Universal Series Bus, USB) development of specification and the rise of flash memory, the portable disk of being convenient to carry has just like become one of the indispensable digital product of modern.The appearance of portable disk also makes the Storage Medias such as 3.5 inch floppy disks (floppy disk) and disc respectively because the shortcoming such as the too small and Data Update of capacity is inconvenient and gesture is little thereupon.
As long as computer system possesses the transmission interface with portable disk product compatibility, though be so data also to be write portable disk or the data that read in portable disk all very convenient, the portability of data also thereby significantly promotes.Just because of this, the user more and more is accustomed to utilizing portable disk to store various data, and then can process data in individual or common computer system.
But what be not difficult to infer is, just because of the volume of portable disk is comparatively light and handy, the user tends to not know losing portable disk unintentionally.When portable disk is picked up when obtaining by other people, also because portable disk inside does not have any user's identity identification information, virtually increased the degree of difficulty of giving back.Moreover the day by day universal of portable disk also easily causes majority to have the situation of identical style portable disk, and then is difficult to pick out rapidly the real owner of portable disk.Under these circumstances, the significant data that is stored in portable disk is also easily got and is leaked by other people mistake because of portable disk.
Summary of the invention
The invention provides a kind of data processing method, can prevent that other people from altering arbitrarily the disk volumn of storage device (Disk Label) title and guaranteeing that the private data in storage device only can be by the access of device owner institute.
The invention provides a kind of data handling system, can prevent that other people from altering arbitrarily the disk volumn title of storage device and guaranteeing that the private data in storage device only can be by the access of device owner institute.
The invention provides a kind of storage device controller, can prevent that other people from altering arbitrarily the disk volumn title of storage device and guaranteeing that the private data in storage device only can be by the access of device owner institute.
The present invention proposes a kind of data processing method, in the method, provides a storage device, and is coupled to main frame.Assign one at main frame and write instruction, and when writing instruction and comprising logic access address and the first data, whether the logic access address that judges that main frame wants to write is one of them of logic access address of the filesystem information of said storage unit.When the logic access address of wanting to write when main frame was one of them of logic access address of filesystem information, storage device write to the second data in storage device in the schedule time, and wherein the second data are different from the first data.
In one example of the present invention embodiment, wherein the schedule time in real time, when storage device is coupled to this main frame again or regularly.
In one example of the present invention embodiment, wherein storage device comprises also that with the step that the second data write in storage device response main frame one writes success message.
In one example of the present invention embodiment, wherein whether the decision logic access address is that one of them step of the logic access address of filesystem information comprises and according to filesystem information, storage device searched the logic access address of disk volumn.When searching the logic access address of disk volumn, record the tag address of the logic access address of stored disk label.And the second data are the data of tag address.
In one example of the present invention embodiment, wherein filesystem information comprises file configuration table (File Allocation Table, FAT) at least.
In one example of the present invention embodiment, wherein storage device comprises an application program, is used for the change disk volumn.And this application program is provided with a password.
In one example of the present invention embodiment, this data processing method also comprises by application program judgement and is stored in the 4th data whether the 3rd data in storage device are same as main frame.The 3rd data that are stored in storage device when application program judgement are when being different from the 4th data of main frame, and application program transmits the 5th data that are stored in storage device to main frame, and shows the 5th data by main frame.
In one example of the present invention embodiment, wherein storage device also comprises a common data area and a private data district.The 3rd data that are stored in storage device when application program judgement are when being same as the 4th data of main frame, the access right in open common data area and private data district.Otherwise, the access right of open common data area only.
In one example of the present invention embodiment, wherein the 3rd data are default host identification information, and the 4th data are the identifying information of main frame, and the 5th data are owner's personal data.
From another viewpoint, the present invention proposes a kind of data handling system, comprises main frame and storage device, and both couple mutually.Main frame is assigned one and is write instruction to storage device, and this writes instruction and comprises logic access address and the first data.Whether storage device decision logic access address is one of them of logic access address of filesystem information.When the logic access address of wanting to write when main frame was one of them of logic access address of filesystem information, storage device write to the second data in storage device in the schedule time.Wherein the second data are different from the first data.
In one example of the present invention embodiment, wherein the schedule time in real time, when storage device is coupled to this main frame again or regularly.
In one example of the present invention embodiment, wherein storage device is searched the logic access address of disk volumn according to filesystem information, when searching the logic access address of disk volumn, records the tag address of the logic access address of stored disk label.
In one example of the present invention embodiment, wherein the second data are the data of tag address.
From another viewpoint, the present invention proposes a kind of storage device controller, is disposed in the storage device that is coupled to main frame, and this storage device also comprises Storage Media.Storage device controller comprises microprocessor unit, Storage Media interface unit, host interface unit, and data processing unit.The Storage Media interface unit is coupled to microprocessor unit, in order to couple Storage Media.Host interface unit is coupled to microprocessor unit, in order to couple main frame.Data processing unit is coupled to microprocessor unit.Wherein, when host interface unit receives the instruction that writes that main frame assigns, and when writing instruction and comprising logic access address and the first data, whether data processing unit decision logic access address is one of them of logic access address of filesystem information.When the logic access address of wanting to write when main frame was one of them of logic access address of filesystem information, data processing unit write to the second data in Storage Media in the schedule time, and wherein the second data are different from the first data.
In one example of the present invention embodiment, wherein the schedule time in real time, when storage device is coupled to this main frame again or regularly.
In one example of the present invention embodiment, wherein data processing unit writes the second data to Storage Media, and response main frame one writes success message.
In one example of the present invention embodiment, wherein data processing unit is searched the logic access address of disk volumn according to filesystem information, when searching the logic access address of disk volumn, records the tag address of the logic access address of stored disk label.
In one example of the present invention embodiment, wherein the second data are the data of tag address.
In one example of the present invention embodiment, wherein filesystem information comprises file configuration table at least.
In one example of the present invention embodiment, wherein storage device also comprises application program, is used for the change disk volumn.This application program is provided with a password.
In one example of the present invention embodiment, wherein storage device controller comprises that also one opens and closes the unit.And use program control keying unit unlatching or close, to determine whether to allow to change disk volumn.
In one example of the present invention embodiment, wherein application program judges whether the 3rd data that are stored in Storage Media are same as the 4th data of main frame, the 3rd data that are stored in Storage Media when the application program judgement are when being different from the 4th data of main frame, application program transmits the 5th data be stored in Storage Media to main frame, and shows the 5th data by main frame.
In one example of the present invention embodiment, wherein Storage Media comprises common data area and private data district.The 3rd data that are stored in Storage Media when application program judgement are when being same as the 4th data of main frame, the access right in open common data area and private data district.And the 3rd data that are stored in Storage Media when the application program judgement are when being different from the 4th data of main frame, only open the access right of common data area.
In one example of the present invention embodiment, wherein the 3rd data are default host identification information, and the 4th data are the identifying information of this main frame, and the 5th data are owner's personal data.
Based on above-mentioned, the present invention avoids other people beyond the device owner arbitrarily to change the disk volumn title of storage device.When storage device is connected with main frame, carry out the detection of main frame simultaneously, if not user's main frame shows owner's personal data, to guarantee that the particular data in storage device only can be by the access of owner institute.
For above-mentioned feature and advantage of the present invention can be become apparent, exemplary embodiment cited below particularly, and be described with reference to the accompanying drawings as follows.
Description of drawings
Fig. 1 is the calcspar of the data handling system that illustrates according to one example of the present invention embodiment.
Fig. 2 is the schematic diagram of the main frame, input/output device and the storage device that illustrate according to one example of the present invention embodiment.
Fig. 3 is the calcspar of the storage device controller that illustrates according to another example of the present invention embodiment.
Fig. 4 is the process flow diagram of the data processing method that illustrates according to one example of the present invention embodiment.
Fig. 5 is the calcspar of the data handling system that illustrates according to another example of the present invention embodiment.
The reference numeral explanation
1000: data handling system
1100: host computer system
1110: main frame
1112: CPU (central processing unit)
1114: storer
1116: system bus
1118: data transmission interface
1150: input/output device
1200: storage device
1210: connector
1220: storage device controller
1222: host interface unit
1224: microprocessor unit
1225: open and close the unit
1226: data processing unit
1228: the Storage Media interface unit
1230: Storage Media
1233: the common data area
1235: the private data district
1202: mouse
1204: keyboard
1206: display
1208: printer
1212: portable disk
1214: storage card
1216: solid state hard disc
1220 ': storage device controller
3002: memory buffer
3004: error correction unit
3006: Power Management Unit
410～430: each step of the described data processing method of one example of the present invention embodiment
Embodiment
Fig. 1 is the calcspar of the data handling system that illustrates according to one example of the present invention embodiment.As shown in Figure 1, data handling system 1000 comprises host computer system 1100 and storage device 1200.For convenience of description, host computer system 1100 is take computer system as example in this exemplary embodiment, and computer system comprises main frame 1110 and I/O (Input/Output, I/O) device 1150.And in other exemplary embodiment, the main frame in host computer system 1100 can be also hand-held mobile device or multimedia player etc.
In this exemplary embodiment, main frame 1110 comprises CPU (central processing unit) (CentralProcessing Unit, CPU) 1112, storer 1114, system bus 1116 and data transmission interface 1118.For instance, input/output device 1150 can be mouse 1202, keyboard 1204, display 1206 and printer 1208 etc. shown in Figure 2, is not limited at this.
To be coupled to main frame 1110 via connector 1210, receiving computer main frame 1110 transmits and next instruction and data storage device controller 1220 according to this, and data are back to main frame 1110 by host interface unit 1222.Wherein, the instruction and the data that transmit of main frame 1110 can be sent to microprocessor unit 1224 by host interface unit 1222.
In this exemplary embodiment, host interface unit 1222 has USB interface, and in other embodiments, host interface unit 1222 can be also the interface unit that meets SATA interface, PATA interface, IEEE 1394 interfaces, PCI Express interface, SD interface, MS interface, MMC interface, CF interface, ide interface or other interface standard.
In addition, storage device controller 1220 is to couple Storage Media 1230 by Storage Media interface unit 1228, according to this to Storage Media 1230 running of being correlated with.In this exemplary embodiment, Storage Media interface unit 1228 is the flash interface unit.
As shown in Figure 1, host interface unit 1222, data processing unit 1226 and Storage Media interface unit 1228 all are coupled to microprocessor unit 1224, and microprocessor unit 1224 is main control units of storage device controller 1220, in order to the assembly synergistic cooperations such as host interface unit 1222, Storage Media interface unit 1228 and data processing unit 1226, to carry out the various runnings of storage device 1200.
In another example of the present invention embodiment, the storage device controller in storage device also comprises other functional module.Fig. 3 is the calcspar of the storage device controller that illustrates according to another example of the present invention embodiment, sees also Fig. 3.In storage device controller 1220 ', except comprise host interface unit 1222, microprocessor unit 1224, data processing unit 1226 and Storage Media interface unit 1228, also comprise in addition memory buffer 3002, error correction unit 3004, and Power Management Unit 3006.
In detail, memory buffer 3002 is coupled to microprocessor unit 1224, in order to the temporary data that come from main frame 1110, or the temporary data that come from Storage Media 1230.
In this exemplary embodiment, when storage device 1200 is coupled to main frame 1110, and what main frame 1110 will comprise logic access address and the first data writes instruction issuing to storage device 1200, at first writes by data processing unit 1226 judgements one of them logic access address whether logic access address in instruction is filesystem information.When carrying out above-mentioned judgement, data processing unit 1226 can be according to the logic access address of filesystem information to storage device 1200 search disk volumns, and when searching the logic access address of disk volumn, the logic access address of stored disk label is recorded as tag address.Wherein, filesystem information comprises file configuration table at least.
When the logic access address of wanting to write when data processing unit 1226 judgement main frames 1110 is not one of them logic access address of filesystem information, storage device controller 1220 writes to storage device 1200 according to the logic access address that writes in instruction with the first data.
When yet the logic access address of wanting to write when data processing unit 1226 judgement main frames 1110 was one of them logic access address of filesystem information, the present user of expression main frame 1110 may want to change the content of the disk volumn of storage device 1200.Arbitrarily do not changed in order to ensure disk volumn, 1226 of data processing units write to the second data in the Storage Media 1230 of storage device 1200 in a schedule time, and RESPONSE CALCULATION machine host 1,110 one writes success message.Wherein, the second data are data of tag address, and the second data are different from the first data.In other words, the first data will not be written into storage device 1200 in the case.
In this exemplary embodiment, data processing unit 1226 for example can judge that main frame 1110 wants to write be one of them logic access address of filesystem information the time, in real time the second data are write to Storage Media 1230.And in other exemplary embodiment, data processing unit 1226 also can just write to Storage Media 1230 with the second data when storage device 1200 is coupled to main frame 1110 again.Perhaps, data processing unit 1226 also can according to the default time, regularly write to Storage Media 1230 with the second data.
Fig. 4 is the process flow diagram of the data processing method that illustrates according to one example of the present invention embodiment.
See also Fig. 4, will write instruction issuing to storage device 1200 by main frame 1110 in step 410.Then in step 420, data processing unit 1226 judgements in storage device controller 1220 write logic access address in instruction be whether filesystem information the logic access address one of them.
If not, in step 430 data processing unit 1226 according to writing instruction, the first data are write in the Storage Media 1230 of storage device 1200.If as shown in step 440, the second data that data processing unit 1226 will be different from the first data in the schedule time write in the Storage Media 1230 of storage device 1200.
In above-mentioned exemplary embodiment, obtain that main frame 1110 transmits write instruction after, storage device controller 1220 judges whether main frame 1110 prepares to change the content of the logic access address of filesystem information.If according to writing instruction, other data are not write to storage device 1200.Avoid accordingly the particular data (for example disk volumn) in filesystem information arbitrarily to be changed.And the yet success message that writes because receiving that storage device controller 1220 returns of main frame 1110, and can not continue to take other to attempt the action of attempting writing.
Fig. 5 is the calcspar of the data handling system that illustrates according to another example of the present invention embodiment.Data handling system 1000 shown in Figure 5 is to shown in Figure 1 similar, difference is that the storage device controller 1200 of Fig. 5 comprises that also one opens and closes unit 1225, and the Storage Media 1230 of storage device 1200 comprises a common data area 1233 and a private data district 1235 at least.Wherein, the content in private data district 1235 only has specific computer system (for example storage device 1200 owners' exclusive computing machine) just can carry out access.Common data area 1233 is not as limit, but the equal access data wherein of any computer system.
In this exemplary embodiment, storage device 1200 comprises an application program (figure does not illustrate), is used for the disk volumn title of change storage device 1200.This application program is to be stored in a write protection district, thereby avoids being deleted or changing by the user.Wherein, the write protection district is set with the zone of cryptoguard in Storage Media 1230, or the system region that the user can't review content in Storage Media 1230.Application program is provided with a password that is set by storage device 1200 owners, just allows to enter application program to use the disk volumn change function of application program and have the password that meets of input only.Specifically, application program can be controlled the unlatching that opens and closes unit 1225 or close according to owner's operation after being activated, to determine whether to allow to change disk volumn.For example, be when being in closed condition when opening and closing unit 1225, expression does not allow to change disk volumn.Otherwise after opening and closing unit 1225 and being employed program and opening, allow the owner to change the disk volumn of storage device 1200.And because the password that enters application program is that owner by storage device 1200 sets, therefore can prevent that other people from arbitrarily altering the disk volumn title.
In addition, the owner also can will preset host identification information and owner's personal data are recorded in the Storage Media 1230 of storage device 1200 by application program.Wherein, default host identification information is for example storage device 1200 owners' the serial number information of CPU (central processing unit) (CPU) of exclusive computing machine or display card serial number information etc., and owner's personal data can be name, e-mail box, phone or address etc.Should be noted that, default host identification information and owner's personal data also must just can be modified by application program.
In this exemplary embodiment, after storage device 1200 was coupled to main frame 1110, application program can automatically perform and judge whether the 3rd data (for example default host identification information) that are stored in Storage Media 1230 are same as the 4th data (for example identifying information of main frame 1110) of main frame 1110.When application program judges that both are not identical, expression main frame 1110 and nonstorage device 1200 owners' exclusive computing machine, therefore application program the 5th data (for example owner's personal data) that will be stored in Storage Media 1230 are sent to main frame 1110, and show owner's personal data by main frame 1110.
Be not difficult to infer, if the owner loses storage device 1200, picking up so the people who obtains storage device 1200 just can be after connecting arbitrary main frame with storage device 1200, by the shown owner's personal data communication means owner of main frame and give back, recover probability when significantly increasing accordingly device and losing.
In addition, after storage device 1200 is coupled to main frame 1110, if application program judges the 3rd data (for example default host identification information) that are stored in Storage Media 1230 and is same as the 4th data (for example its identifying information) of main frame 1110, expression main frame 1110 is exclusive computing machines of storage device 1200 owners, so the access right in application program open common data area 1233 and private data district 1235.That is to say, this moment, main frame 1110 just can read the data in common data area 1233 and private data district 1235, also data can be write to common data area 1233 and private data district 1235 simultaneously.
Otherwise if the 3rd data in Storage Media 1230 are not identical with the 4th data of main frame 1110, application program will only be opened the access right of common data area 1233 so.Be stored in that data in private data district 1235 can be protected and can be by arbitrary access.
In sum, data processing method of the present invention, system and storage device controller can prevent that after the owner sets up the disk volumn of storage device on their own other people from arbitrarily altering.When storage device is connected with non-default main frame, shows owner's personal data and forbid that main frame carries out access to partial document or zone simultaneously, setting up according to this specificity of storage device, and promote the probability that storage device can be recovered when losing.
Although the present invention discloses as above with embodiment; so it is not to limit the present invention; those skilled in the art can do some changes and retouching under the premise without departing from the spirit and scope of the present invention, therefore protection scope of the present invention is as the criterion with claim of the present invention.
Claims (20)
1. data processing method comprises:
One storage device is provided, and is coupled to a main frame;
This main frame is assigned one and is write instruction, and this writes instruction and comprises a logic access address and one first data;
Judge whether this logic access address is the logic access address of a disk volumn of this storage device; And
This logic access address of wanting to write when this main frame is during for the logic access address of this disk volumn, and this storage device writes to one second data in a schedule time in the logic access address of this disk volumn, and wherein these second data are different from this first data.
2. data processing method as claimed in claim 1, wherein should the schedule time in real time, when this storage device is coupled to this main frame again or regularly.
3. data processing method as claimed in claim 1, wherein this storage device also comprises the step that these second data write to the logic access address of this disk volumn:
Respond this main frame one and write success message.
4. data processing method as claimed in claim 1 judges that wherein whether this logic access address is that the step of logic access address of this disk volumn of this storage device comprises:
This storage device is searched the logic access address of this disk volumn according to a filesystem information; And
When searching the logic access address of this disk volumn, record stores a tag address of the logic access address of this disk volumn.
5. data processing method as claimed in claim 4, wherein these second data data that are this tag address.
6. data processing method as claimed in claim 4, wherein this document system information comprises a file configuration table at least.
7. data processing method as claimed in claim 4, wherein this storage device comprises an application program, is used for this disk volumn of change, wherein this application program is provided with a password.
8. data processing method as claimed in claim 7 also comprises:
Judge by this application program whether one the 3rd data that are stored in this storage device are same as one the 4th data of this main frame; And
The 3rd data that are stored in this storage device when the judgement of this application program are when being different from the 4th data of this main frame, and this application program transmits one the 5th data that are stored in this storage device to this main frame and shows the 5th data by this main frame.
9. data processing method as claimed in claim 8, wherein this storage device also comprises a common data area and a private data district;
The 3rd data that are stored in this storage device when the judgement of this application program are when being same as the 4th data of this main frame, the access right in open this common data area and this private data district; And
The 3rd data that are stored in this storage device when this application program judgement are when being different from the 4th data of this main frame, only open the access right of this common data area.
10. data processing method as claimed in claim 8, wherein the 3rd data are a default host identification information, the 4th data are an identifying information of this main frame, and the 5th data are owner's personal data.
11. a data handling system comprises:
Be used for being coupled to the parts of storage device;
Be used for being coupled to the parts of a main frame;
Parts that write instruction that be used for to receive that this main frame assigns, this writes instruction and comprises a logic access address and one first data;
Be used for judging that whether this logic access address is the parts of logic access address of a disk volumn of this storage device; And
When this logic access address that is used for wanting to write when this main frame is the logic access address of this disk volumn, this memory storage writes to one second data in a schedule time parts of the logic access address of this disk volumn, and wherein these second data are different from this first data.
12. data handling system as claimed in claim 11, wherein should the schedule time in real time, when this storage device is coupled to this main frame again or regularly.
13. data handling system as claimed in claim 11, when this logic access address that wherein is used for wanting to write when this main frame was the logic access address of this disk volumn, this memory storage also comprised the parts that these second data write to the logic access address of this disk volumn in this schedule time:
Be used for the subassembly that this main frame one of response writes success message.
14. data handling system as claimed in claim 11 is used for wherein judging that whether this logic access address is that the parts of logic access address of this disk volumn of this storage device comprise:
Be used for according to a filesystem information, this storage device being searched the subassembly of the logic access address of this disk volumn; And
Be used for when searching the logic access address of this disk volumn the subassembly of one tag address of the logic access address of this disk volumn of record storage.
15. data handling system as claimed in claim 14, wherein these second data data that are this tag address.
16. data handling system as claimed in claim 14, wherein this document system information comprises a file configuration table at least.
17. data handling system as claimed in claim 14, wherein this storage device also comprises an application program, is used for this disk volumn of change, and wherein this application program is provided with a password.
18. data handling system as claimed in claim 17 also comprises:
Be used for whether being same as by one the 3rd data that this application program judgement is stored in this storage device the parts of one the 4th data of this main frame; And
The 3rd data that are used for being stored in this storage device when this application program judgement are when being different from the 4th data of this main frame, and this application program transmits one the 5th data that are stored in this storage device to this main frame and shown the parts of the 5th data by this main frame.
19. data handling system as claimed in claim 17, wherein this storage device also comprises a common data area and a private data district, and this disposal system also comprises;
The 3rd data that are used for being stored in this storage device when this application program judgement are when being same as the 4th data of this main frame, the parts of the access right in this common data area of opening and this private data district; And
The 3rd data that are used for being stored in this storage device when this application program judgement are when being different from the 4th data of this main frame, only open the parts of the access right of this common data area.
20. data handling system as claimed in claim 19, wherein the 3rd data are a default host identification information, and the 4th data are an identifying information of this main frame, and the 5th data are owner's personal data.
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