WO2004049166A1 - 初期状態への復旧機能を有する記憶制御装置、記憶装置の制御方法、およびプログラム - Google Patents
初期状態への復旧機能を有する記憶制御装置、記憶装置の制御方法、およびプログラム Download PDFInfo
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- WO2004049166A1 WO2004049166A1 PCT/JP2002/012374 JP0212374W WO2004049166A1 WO 2004049166 A1 WO2004049166 A1 WO 2004049166A1 JP 0212374 W JP0212374 W JP 0212374W WO 2004049166 A1 WO2004049166 A1 WO 2004049166A1
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- data storage
- initial data
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0638—Organizing or formatting or addressing of data
- G06F3/064—Management of blocks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0706—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment
- G06F11/0727—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment in a storage system, e.g. in a DASD or network based storage system
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0793—Remedial or corrective actions
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1415—Saving, restoring, recovering or retrying at system level
- G06F11/1417—Boot up procedures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0629—Configuration or reconfiguration of storage systems
- G06F3/0634—Configuration or reconfiguration of storage systems by changing the state or mode of one or more devices
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0629—Configuration or reconfiguration of storage systems
- G06F3/0635—Configuration or reconfiguration of storage systems by changing the path, e.g. traffic rerouting, path reconfiguration
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0673—Single storage device
- G06F3/0674—Disk device
Definitions
- the present invention relates to a storage control device having a function of returning to an initial state, a storage device control method, and a program.
- the present invention relates to a storage technique and a recording technique in a computer or the like.
- the present invention is applied to an information device such as a personal computer having a storage device such as a fixed magnetic disk device or a nonvolatile semiconductor storage device.
- a storage device such as a fixed magnetic disk device or a nonvolatile semiconductor storage device.
- Such information devices are sold in advance by storing computer programs such as an operating system and application software in a storage device. These information devices are required to have a function to return to the factory default state due to troubles during use, for example.
- FIG. 1 shows a storage configuration of a storage device such as a fixed magnetic disk device included in an information device such as a personal computer.
- a computer program such as an operating system and an abbreviated software is recorded in advance at the time of factory shipment, such as 700 in FIG. 1, and is sold.
- setting data is added to the computer program and stored as initial data 720 in a partial area on a fixed magnetic disk.
- a rewritable program and setting data are mixed in the initial data 720. Therefore, as the user uses the program or updates it to a new program, an area that is rewritten from the initial state and an area that remains in the initial state are mixed as shown in FIG.
- initial data for example, there are cases where it is desired to return to the initial state at the time of shipment from the factory due to troubles during use.
- a method of storing the initial data a method of simply making the initial data area unwritable is conceivable. But like this It is not possible to actually apply a method that makes writing on a fixed magnetic disk or the like impossible. This is because the program cannot be updated or the setting data cannot be updated.
- Japanese Patent Application Laid-Open Nos. 63-228323 and 5-216654 disclose conventional techniques for nonvolatile semiconductor memory devices such as flash memories.
- the storage area is divided into an initial data area, a map area, and a changed data area.
- the address of the changed portion with respect to the initial data is written to the map area, and the changed data is written to the changed data area.At the time of reading, after reading all the initial data once, the map area and the changed data are sequentially read. Overwrite initial data.
- Japanese Patent Application Laid-Open No. 5-216654 discloses a technique in which an old program is always stored in one flash memory by using two flash memories to prevent a startup program from being lost when rewriting the flash memory. I do.
- the method disclosed in Japanese Patent Application Laid-Open No. 63-228323 has a configuration in which the initial data is read once, the changed data is read, and the initial data is corrected, so that consideration for high speed is not sufficient. Disclosure of the invention
- an object of the present invention is to restore a computer to an initial state at the time of shipment.
- the goal is to minimize the amount of time it takes.
- the present invention employs the following means in order to solve the above problems. That is, the present invention relates to an initial data storage area for storing initial data, an update data storage area for storing update data associated with the initial data, and either the initial data storage area or the update data storage area. A designated area for storing address conversion information designated as a read target, and a storage control device for controlling such a storage device.
- a writing unit that writes data to the update data storage area
- An initialization unit that rewrites the information in the specified area to a setting for reading the initial data; a selection unit that selects which of the initial data storage area and the update data storage area to read in reading data;
- a reading unit that reads an update data storage area or an initial data storage area according to the selection of the selection unit.
- the initial data is data stored when the storage device or a system including the storage device is shipped from a factory, for example, a computer program, or both.
- the update data is, for example, data for adding or changing the above-mentioned data, a computer program, or the like.
- This updated data is stored in the storage area corresponding to the initial data.
- the storage area corresponding to the initial data is, for example, a storage area that can be uniquely determined from the storage area of the initial data by a predetermined process.
- the storage control device is configured to store, at an initial point in time, a designated area in which information for reading out the initial data storage area is set, and to read out the update data storage area when writing to the update data storage area is performed. Rewrite to Then, the storage control device selects which of the initial data storage area and the update data storage area to read in reading data, and reads the update data storage area or the initial data storage area according to the selection.
- the initial data storage area is maintained while the initial data is being stored.
- Data that combines data and update data Further, the increase in the read time for reading the data obtained by combining the initial data and the update data can be reduced to the range of the data read time of the specified area.
- the storage control device includes an initialization unit that rewrites the information of the designated castle to the setting for reading the initial data, so that the storage device can be initialized in the writing time to the designated area.
- the storage device stores an initial data storage area and an update data storage area alternately for each predetermined storage unit,
- the reading unit may read out at least one of the data of the initial data storage area and the data of the update data storage area which are alternately arranged.
- the storage management device may further include a logical address management unit that associates the initial data storage area and the update data storage area with the same logical address.
- the storage device is a disk-type storage device, and the predetermined storage unit may be one or more tracks of the disk.
- the predetermined storage unit may be one or more tracks of the disk.
- the storage device may include at least one of the initial data storage area, the update data storage area, and the designated area on a nonvolatile semiconductor memory.
- the present invention may be a method in which a computer or other device, machine, or the like executes any one of the processes described above.
- the present invention may be a program that causes a computer or other device, machine, or the like to realize any of the functions, steps, or processes described above.
- such a program may be recorded on a recording medium readable by a computer or other device, machine, or the like.
- FIG. 1 is an example of data storage on a fixed magnetic disk device in which rewritable programs and data are mixed.
- FIG. 2 is an example of a configuration of a fixed magnetic disk device according to the first embodiment, and
- FIG. 3 is an example of a data storage format of a fixed magnetic disk device having a conventional initial state return function.
- Fig. 4 is an example of the return operation, in which the conventional initial state return function is used to return to the initial state.
- FIG. 5 is an example of a data storage format of the information device according to the first embodiment
- FIG. 6 is a flowchart showing a switching operation of a logical address-track number conversion circuit
- FIG.7 is an example of the format for storing address translation information.
- FIG. 8 is a first modification of the data storage format of the fixed magnetic disk device having the initial state return function
- FIG. 9 is a second modification of the data storage format of the fixed magnetic disk device having the initial state return function.
- F I G. 10 is a modification of the fixed magnetic disk drive
- FIG.11 is an example of the data storage format for the initial state return function in information devices including flash memory, etc.
- FIG.12 is an example of the data storage format when two flash memories are used.
- FIG.13 is an example of the address conversion information storage format when applied to flash memory, etc.
- FIG.14 is an example of the address conversion method (initial state) when applied to flash memory etc.
- FIG. 15 shows an example of an address conversion method (write operation 1) when applied to flash memory, etc.
- FIG.16 is an example of address conversion method (write operation 2) when applied to flash memory etc.
- FIG. 17 shows an example of the address conversion method (in use) when applied to a flash memory or the like.
- This information device is an information device having a fixed magnetic disk device.
- the fixed magnetic disk device stores an operating system (hereinafter referred to as OS), various application programs, and initial data set at the time of factory shipment.
- OS operating system
- various application programs various application programs
- initial data set at the time of factory shipment initial data set at the time of factory shipment.
- FIG. 3 shows an example of a data storage format of such a fixed magnetic disk device having a conventional initial state return function.
- the storage state 300 of the fixed magnetic disk at the time of shipment from the factory is shown.
- the initial data 300 is stored in the area from track n-m + 1 to n, and a copy 3 05 of the initial data 303 is stored in tracks 1 to m.
- the area from track m + 1 to n ⁇ m is unused area 304.
- a copy 3 0 5 of the initial data 3 0 3 and an unused area 3 0 4 constitute a readable and writable update data storage area 3 0 2.
- Such a storage state is called an initial state of the fixed magnetic disk.
- a copy of the initial data 305 is rewritten. Therefore, in the information device after being used by the user, the storage state of the fixed magnetic disk is as shown in a state 310 shown on the right side of FIG.
- FIG. 4 is an example of a return operation in which the in-use state 3 10 of FIG. 3 is returned to the initial state by the conventional initial state return function.
- the initial data 321 (same contents as the initial data 303 or 3 1 1 of FIG. 3) stored in the area from track n — m + 1 to track n is read out by the CPU 110, Copied from track 1 to m.
- a copy of the initial data 3 23 is created (this is identical to the copy of the initial data 305 in FIG. 3), and the area from tracks m + 1 to n—m is unused.
- the initial data is not copied and used, but is used in a state where the initial data is stored according to the following procedure. That is, this information device is provided with an initial data storage area mapped to the same logical address as the update data storage area on the fixed magnetic disk.
- This address conversion information specifies reading from the update data storage area or reading from the initial data storage area.
- this information device reads data from the initial data storage area from the initial state until the first data write occurs. Then, after writing the first data, the address conversion information is changed so as to be read from the update data storage area.
- this information device does not require a process of copying initial data. Even after the initial data has been rewritten, the time required to return to the original factory default state is set to almost 0 (the time required to switch the read target).
- FIG. 2 is a configuration example of a fixed magnetic disk drive embodying the present invention.
- the CPU 110 transmits the logical address 202 prior to writing or reading data.
- the logical address ⁇ track number conversion circuit 104 converts the logical address to the track number 201, and the head moving mechanism 103 disassembles the head 102. To the position of the above-mentioned track number 201 of step 101.
- a track number corresponding to one logical address is uniquely determined. Therefore, in a conventional fixed magnetic disk device having a function of restoring the initial state, the initial data is stored as in Fig. 3 and the initial data is stored using an external CPU 110 program as in Fig. 4. By copying, the initial state return function was realized.
- FIG. 5 shows a data storage format of the information device in the present embodiment.
- This information device is configured such that the area of the fixed magnetic disk is divided into three (areas 401, 402, and 403) as in the factory default state 400.
- the address conversion information 404 is stored in one of the three areas (the area 401 of the track number 2 n + 1 1 to 2 n + a), and the other area (the area 402 of the track number n to 2 n). And the initial data 405 is recorded.
- the remaining one (area 403 of track numbers 1 to n 403) is reserved at the head of the fixed magnetic disk as an unused area 406 having the same size as the initial data 405.
- the storage state when a write request occurs is shown on the right side of FIG.
- data is written to the area of track numbers 1 to n while the initial data 412 of track numbers n + 1 to 2 n is stored, and the written area 413 is unused or read only. Is performed, an area 414 is generated.
- the address conversion information 411 holds information as to whether or not each track of track numbers 1 to n has been written.
- the logical address ⁇ track number conversion circuit 104 of the present information device switches the track to be used between the track number in the update data storage area 403 and the track number in the initial data storage area 402 by the address conversion information 404. .
- the switching operation of the logical address ⁇ track number conversion circuit 104 is shown in FI G. 6. Show.
- the logical address transmitted from the CPU 110 is first converted into the track number of the update data storage area in the logical address ⁇ track number conversion circuit 104 (S10).
- the logical address-track number conversion circuit 104 determines whether the access is a write operation or a read operation (S11).
- the track number is transmitted to the head moving mechanism 103, and data is written using a normal track number (S18).
- S18 a normal track number
- the address translation information of the relevant track has been written as shown in FIG. Rewrite (S16).
- the logical address ⁇ track number conversion circuit 104 refers to the address conversion information (S12), and determines whether or not the track has been written (S14).
- the logical address ⁇ track number conversion circuit 104 transmits the track number of the update data storage area as it is (S18). On the other hand, if writing has not yet been performed on the track to be read, the logical address ⁇ track number conversion circuit 104 transmits the track number of the initial data storage area (S17).
- FIG. 7 shows details of the address conversion information 420.
- the address translation information 420 is stored in the area of tracks 2 n + 1 to 2 n + a of the fixed magnetic disk.
- the address conversion information 420 is provided with one bit for each track to be accessed (track numbers 1 to n).
- all the address conversion information 404 of FIG. 7 may be set to zero.
- the fixed magnetic disk can be returned to the initial state in the time for clearing the data of the number of bits corresponding to the total number of tracks.
- FIG. 8 shows another example of a data storage format of a fixed magnetic disk device having an initial state return function.
- the initial data storage area and the update data storage area are alternately arranged on adjacent tracks. That is, in the factory default state 500 (left side of FIG. 8), among the tracks of track numbers 1 to 2 n, the odd tracks are unused and the even data stores the initial data. .
- the changed data is stored in track 1 instead of track 2.
- the changed data is stored in track 2m-1 instead of track 2m.
- This read operation protects the initial data, shortens the head movement distance when reading data in which both written tracks and unwritten tracks (initial data tracks) are mixed, and reduces the read operation. It can be executed at high speed.
- FI G. 9 has a data storage type for fixed magnetic disk units with
- the initial data storage area 402 and the updated data storage area 403 have the same size. Therefore, in the example shown in FIG. 5, the area of the fixed magnetic disk is occupied by the designated area 401, the initial data storage area 402, and the updated data storage area 403 for storing data obtained by changing the initial data. There is no space available for the user.
- the size of the initial data usually occupies only a part of the total storage area. For example, for the number n of tracks in the update data storage area and the number m of tracks in the initial data storage area, m-k n is satisfied. Therefore, as in Fig. 9, an update data storage area 52 4 (track numbers 1 to m) corresponding to the size of the initial data 526 (the number of tracks m) is secured, and data obtained by rewriting the initial data 526 is stored. If possible.
- this area 523 can be opened as a user area.
- FIG. 10 shows another configuration example of the fixed magnetic disk drive.
- the address translation information was stored on the same disk as the data.
- implementation of the present invention is not limited to such a configuration.
- the fixed magnetic disk device 600 shown in FIG. 10 has a nonvolatile semiconductor memory 605 as compared with the fixed magnetic disk device of FIG. By recording the address conversion information in the nonvolatile semiconductor memory 605, the time required for the address conversion is reduced.
- the fixed magnetic disk device 600 shortens the time required for reading data by recording the initial data in the nonvolatile semiconductor memory 605.
- the CPU 610 when reading data, the CPU 610 outputs a logical address to the logical address ⁇ track number conversion circuit 604. Then, the logical address ⁇ track number conversion circuit 604 converts the logical address into a track number.
- the logical address-track number conversion circuit 604 accesses the nonvolatile semiconductor memory 605 to determine whether or not the track has been written. And The logical address-track number conversion circuit 604 outputs a selection signal to the data selection circuit 606.
- the data selection circuit 606 switches and outputs read data from the nonvolatile semiconductor memory 605 and read data from the fixed magnetic disk 601 according to a selection signal.
- the read data may be switched between the initial data track and the write data track.
- the procedure is the same as that shown in Fig. 6.
- FIGS. 11 to 16 An information device according to a second embodiment of the present invention will be described based on the drawings of FIGS. 11 to 16.
- an example of a configuration in which an information device having a fixed magnetic disk device is returned to an initial state at the time of factory shipment in a short time has been described.
- FIG. 11 shows an example of a data storage format for an initial state return function in an information device including a flash memory or the like.
- FIG. 11 shows an example in which one flash memory is used and the size of the initial data storage area 802 (number of sectors n) is equal to the size of the update data storage area 803 (number of sectors n). Is shown.
- FIG. 11 corresponds to FIG. 5 of the first embodiment, and sector numbers 1, n, 2n, 2n + a, etc. are shown instead of the track numbers.
- the physical storage medium has been replaced by a flash memory instead of a fixed magnetic disk, but the logical storage configuration is the same as that of FIG. That is, as shown on the left side of FIG. 11, in the initial state 800 at the time of factory shipment, the update data storage area 803 of the sectors 1 to n is set as an unused area 806 and the sector n + 1 to 2
- Initial data 805 is stored in an initial data storage area 802 of n, and address conversion information 804 is stored in a designated area 801 of sectors 2 n + 1 to 2 n + a.
- the initial data 81 2 (the same content as the initial data 805) is stored in the written area. 8 13 and the unused (or read-only) area 8 14 will be mixed.
- the flash memory operates in the same manner as the fixed magnetic disk device shown in FIG.
- flash memories are managed in units of sectors, which is the smallest erase unit.
- FIG.12 is an example of a storage configuration using two flash memories (Fl, F2) with different sizes for the initial data storage area and the update data storage area. That is, in the initial state 820 at the time of factory shipment, the initial data 827 is stored in the initial data storage area 822 (sectors 1 to m of the first flash memory F1), and the specified area 821 (first flash memory F1 The address conversion information 826 is stored in the sectors m + 1 to n). On the other hand, the update data storage area 825 (sectors 1 to n of the second flash memory F2) is an unused area 828. The unused area 828 includes an update data storage area 823 having no corresponding initial data, and an update data storage area 824 having the corresponding initial data.
- the update data storage area 824 having the corresponding initial data is composed of an area 834 in which data has been written and an area 833 which is unused (or in which only reading has been performed).
- sectors other than sectors 1 to m in the update data storage area 825 are areas that can be used by the user. This configuration is the same as that described in FIG.
- FI G.13 is a format of address conversion information when applied to flash memory, etc. This is an example of a delivery format.
- all data bits are designed to be “1” when erasing.
- the initial operation can be performed only by erasing the address conversion information area that is a part of the entire capacity of the flash memory. A return operation to the state is performed.
- Fig. 14 shows the initial state when applied to flash memory and the like.
- the information device has a CPU 850 and a flash memory 860.
- the CPU 850 reads the address conversion information 86 1 from the flash memory 860 and sets the physical address ⁇ logical address conversion mechanism (image U) 85 1 inside the CPU 850.
- the physical address indicating the initial data 862 is all mapped to the logical address space 854 seen from the internal bus 852 of the CPU 850.
- FIG.15 and FIG.16 are examples of write operations.
- Fig.15 shows the operation when the first write occurs from the initial state (FIG.14).
- the physical address to logical address conversion mechanism (MMU) 851 When a write operation occurs from the internal bus 852 of the CPU 850 to the address mapped to the initial data of the logical address space 854, the physical address to logical address conversion mechanism (MMU) 851 generates an interrupt inside the CPU. .
- FIG. 16 shows the processing by this interrupt.
- the physical address to logical address conversion mechanism (MMU) 851 maps the corresponding address conversion information to the unused area 863, and then performs a write operation.
- the address translation information is changed from 1 to 0 as shown in FIG.
- the physical address-logical address conversion mechanism (MMU) 851 refers to the address conversion information 861.
- the physical address ⁇ logical address conversion mechanism (hidden U) 851 maps to the area of the initial data 862 in the physical address space.
- the physical address ⁇ logical address conversion mechanism (MMU) 851 maps the data to the written sector.
- FIG.17 shows the in-use state where the initial data area and changed data are mixed.
- the physical address to logical address conversion mechanism (MMU) 851 uses the physical address space in which the initial data 862 and the changed data are mixed in the current valid data (in the logical address space in the order of sectors). Data).
- a program executed on the CPU 850 reads out the initial data 862 while the initial data 862 is not rewritten.
- this program accesses the written data.
- this information device by resetting the address conversion information 861 (set all to 1 as described in FIG. 13), it is possible to return to the initial state in a short time.
- the erased time of a given sector of the flash memory from the state after use is the factory default. It can return to the initial state.
- a program that causes a computer or other device or machine (hereinafter, a computer or the like) to realize any of the above functions can be recorded on a recording medium that can be read by a computer or the like.
- the function can be provided by causing a computer or the like to read and execute the program on the recording medium.
- a recording medium that can be read by a computer or the like means that information such as data and programs is stored by electrical, magnetic, optical, mechanical, or chemical action, Refers to a recording medium that can be read from a computer.
- those removable from a computer or the like include, for example, a flexible disk, a magneto-optical disk, a CD-R0M, a CD-R / W, a DVD, a DAT, an 8 mm tape, a memory card, and the like. There is.
- a recording medium fixed to a computer or the like includes a hard disk and a ROM (read only memory).
- the above program can be stored in a hard disk or a memory of a computer or the like, and can be distributed to other computers via a communication medium.
- the program is transmitted over a communication medium as a data communication signal embodied by a carrier wave. Then, the computer or the like that has received the distribution can provide the above functions.
- the communication medium may be a wired communication medium such as a metal cable including a coaxial cable and a twisted pair cable, an optical communication cable, or a wireless communication medium such as a satellite communication and a terrestrial wireless communication. Le, deviation may be.
- the carrier is an electromagnetic wave or light for modulating a data communication signal.
- the carrier may be a DC signal.
- the data communication signal has a baseband waveform without a carrier. Therefore, the data communication signal embodied in a carrier wave may be either a modulated broadband signal or an unmodulated baseband signal (corresponding to a case where a DC signal of voltage 0 is used as the carrier wave).
- This invention can be utilized for the manufacturing industry of various information devices, such as a computer, a mobile telephone, a portable terminal, and an in-vehicle device, and the service industry using such information devices.
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004554945A JP4173138B2 (ja) | 2002-11-27 | 2002-11-27 | 初期状態への復旧機能を有する記憶制御装置、記憶装置の制御方法、およびプログラム |
CNB028295285A CN1303533C (zh) | 2002-11-27 | 2002-11-27 | 具有恢复到初始状态的功能的存储控制设备及其控制方法 |
PCT/JP2002/012374 WO2004049166A1 (ja) | 2002-11-27 | 2002-11-27 | 初期状態への復旧機能を有する記憶制御装置、記憶装置の制御方法、およびプログラム |
US11/072,676 US20060031657A1 (en) | 2002-11-27 | 2005-03-04 | Storage control device having restoration function to initial status, control method of storage device, and program |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2002/012374 WO2004049166A1 (ja) | 2002-11-27 | 2002-11-27 | 初期状態への復旧機能を有する記憶制御装置、記憶装置の制御方法、およびプログラム |
Related Child Applications (1)
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US11/072,676 Continuation US20060031657A1 (en) | 2002-11-27 | 2005-03-04 | Storage control device having restoration function to initial status, control method of storage device, and program |
Publications (1)
Publication Number | Publication Date |
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WO2004049166A1 true WO2004049166A1 (ja) | 2004-06-10 |
Family
ID=32375614
Family Applications (1)
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PCT/JP2002/012374 WO2004049166A1 (ja) | 2002-11-27 | 2002-11-27 | 初期状態への復旧機能を有する記憶制御装置、記憶装置の制御方法、およびプログラム |
Country Status (4)
Country | Link |
---|---|
US (1) | US20060031657A1 (ja) |
JP (1) | JP4173138B2 (ja) |
CN (1) | CN1303533C (ja) |
WO (1) | WO2004049166A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007148906A (ja) * | 2005-11-29 | 2007-06-14 | Fujitsu Ltd | 動作環境切り替えプログラム及び情報処理装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114371816A (zh) * | 2021-12-14 | 2022-04-19 | 深圳市凯迪仕智能科技有限公司 | 一种数据存储方法及电子设备 |
Citations (5)
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JPH04233624A (ja) * | 1990-07-23 | 1992-08-21 | Internatl Business Mach Corp <Ibm> | パーソナル・コンピュータ・システム内でシステム・ユーティリティを保護するための装置 |
JPH06149486A (ja) * | 1992-11-06 | 1994-05-27 | Toshiba Corp | 医療事務用コンピュータ装置 |
JPH0869376A (ja) * | 1994-08-31 | 1996-03-12 | Hitachi Ltd | Biosの書き換え制御回路 |
JPH1091359A (ja) * | 1996-07-19 | 1998-04-10 | Samsung Electron Co Ltd | ハードディスクの分割方法及びこれを利用したコンピュータシステムのテスト方法 |
JP2000298608A (ja) * | 1999-02-09 | 2000-10-24 | Yuitoku Go | コンピュータデータ記憶媒体及びメモリ管理方法 |
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JPS63228323A (ja) * | 1987-03-18 | 1988-09-22 | Mitsubishi Electric Corp | 追記型メモリカ−ドの記録方式 |
US5214695A (en) * | 1990-07-23 | 1993-05-25 | International Business Machines Corporation | Apparatus and method for loading a system reference diskette image from a system partition in a personal computer system |
US5473775A (en) * | 1991-10-11 | 1995-12-05 | Kabushiki Kaisha Toshiba | Personal computer using flash memory as BIOS-ROM |
US5878256A (en) * | 1991-10-16 | 1999-03-02 | International Business Machine Corp. | Method and apparatus for providing updated firmware in a data processing system |
US6016536A (en) * | 1997-11-13 | 2000-01-18 | Ye-Te Wu | Method for backing up the system files in a hard disk drive |
US6519762B1 (en) * | 1998-12-15 | 2003-02-11 | Dell Usa, L.P. | Method and apparatus for restoration of a computer system hard drive |
US7231382B2 (en) * | 2001-06-01 | 2007-06-12 | Orbitz Llc | System and method for receiving and loading fare and schedule data |
US8386727B2 (en) * | 2001-12-31 | 2013-02-26 | Hewlett-Packard Development Company, L.P. | Supporting interleaved read/write operations from/to multiple target devices |
-
2002
- 2002-11-27 JP JP2004554945A patent/JP4173138B2/ja not_active Expired - Fee Related
- 2002-11-27 WO PCT/JP2002/012374 patent/WO2004049166A1/ja active Application Filing
- 2002-11-27 CN CNB028295285A patent/CN1303533C/zh not_active Expired - Fee Related
-
2005
- 2005-03-04 US US11/072,676 patent/US20060031657A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04233624A (ja) * | 1990-07-23 | 1992-08-21 | Internatl Business Mach Corp <Ibm> | パーソナル・コンピュータ・システム内でシステム・ユーティリティを保護するための装置 |
JPH06149486A (ja) * | 1992-11-06 | 1994-05-27 | Toshiba Corp | 医療事務用コンピュータ装置 |
JPH0869376A (ja) * | 1994-08-31 | 1996-03-12 | Hitachi Ltd | Biosの書き換え制御回路 |
JPH1091359A (ja) * | 1996-07-19 | 1998-04-10 | Samsung Electron Co Ltd | ハードディスクの分割方法及びこれを利用したコンピュータシステムのテスト方法 |
JP2000298608A (ja) * | 1999-02-09 | 2000-10-24 | Yuitoku Go | コンピュータデータ記憶媒体及びメモリ管理方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007148906A (ja) * | 2005-11-29 | 2007-06-14 | Fujitsu Ltd | 動作環境切り替えプログラム及び情報処理装置 |
Also Published As
Publication number | Publication date |
---|---|
US20060031657A1 (en) | 2006-02-09 |
JPWO2004049166A1 (ja) | 2006-03-30 |
JP4173138B2 (ja) | 2008-10-29 |
CN1303533C (zh) | 2007-03-07 |
CN1659524A (zh) | 2005-08-24 |
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