JP4391793B2 - File update device - Google Patents

Description

  The present invention relates to a technique for updating a file stored in a recording medium such as a semiconductor memory, and in particular, a logical error between a storage state of file configuration data and file management information that occurs when the update is stopped halfway. The present invention relates to a technique for eliminating the alignment.

  Conventionally, management of data stored in a recording area in a recording medium such as a semiconductor memory, a magnetic disk, or a magneto-optical disk is realized by a file system. In the file system, the recording area is divided into clusters, which are sets of sectors that are physical minimum access units, and data recorded in one or more clusters is managed as a file. A file on a recording medium managed by the file system can be exchanged between devices corresponding to the same file system.

Hereinafter, a FAT file system which is one of the conventional file systems will be described.
The FAT file system is a file system generally used in an information processing apparatus such as a personal computer (PC), and manages a physical storage position of data constituting a file by a table called FAT (File Allocation Table). Has characteristics.

FIG. 1 is a diagram showing a data structure in a storage area in a FAT file system.
In the FAT file system shown in FIG. 1, a management information area 100 is provided for managing the recording area at the head when the recording area in the recording medium is viewed according to the logical address. In the recording area, a data area 110 for storing data constituting the file is positioned behind the management information area 100.

  The management information area 100 includes a master boot record / partition table 101 that stores information for managing a recording area divided into a plurality of areas called partitions, and a partition boot sector 102 that stores management information in one partition. And FAT 103 and FAT 104 indicating the physical storage location of data contained in the file, and a root directory entry 105 for storing information on the file or directory existing immediately under the root directory. The FAT 103 and the FAT 104 are duplicated because they are important areas indicating the physical storage positions of data included in the file, and have the same contents.

  The data area 110 is divided into clusters and managed, and each cluster stores data constituting a file. For a file composed of a larger amount of data than one cluster, the configuration data is divided into a plurality of clusters, and the link between the clusters corresponding to the file is linked information stored in the FAT 103 and the FAT 104. It is managed by.

The FAT file system is described in detail in ISO / IEC9293, “Information Technology-Volume and file structure of disk cartridges for information interchange” (1994) and the like.
2 is a diagram showing a directory entry which is file management information, FIG. 3 is a diagram showing FAT, and FIG. 4 is a diagram showing data constituting the file contents.

Hereinafter, the relationship between the directory entry in the FAT file system and the data constituting the file will be described with reference to FIGS.
In a part of the root directory entry and data area, a directory entry 201 as management information for one file such as a file name and a file size as shown in FIG. 2 is stored.

  A data area that is a storage destination of data constituting the file is managed in cluster units, and each cluster is assigned a uniquely identifiable cluster number. In order to identify the cluster in which the data constituting the file is stored, the directory entry 201 includes the cluster number (starting cluster number) of the cluster in which the head portion of the data constituting the file is stored, the file name and Stored with file size.

  The directory entry 201 illustrated in FIG. It consists of a file name of TXT, a start cluster number of 10, and a file size of 60 kilobytes (KB). This is because FILE1. The head of the data constituting the file named TXT is stored in the cluster No. 10, indicating that the total size of all the data constituting the file content is 60 kilobytes.

In the case of a file in which data is stored in a plurality of clusters, information for specifying a cluster number subsequent to the cluster indicated by the start cluster number is link information on the FAT.
The FAT 202 shown in FIG. 3 is provided with a FAT entry that is a field corresponding to each cluster number, and each FAT entry indicates whether or not the corresponding cluster is used as data constituting the file contents. If it is used, the number of the cluster that will be the succeeding destination where the data constituting the same file content is recorded is stored. In the FAT entry, for example, 0xFFF is stored as a value indicating the end when there is no subsequent cluster in the corresponding cluster.

  In the example of FIG. 3, since 11 is stored in the FAT entry corresponding to the 10th cluster, the 10th cluster is linked to the 11th cluster. Similarly, 12 is stored in the FAT entry corresponding to the 11th cluster, and 13 is stored in the FAT entry corresponding to the 12th cluster. The 10th, 11th, 12th, and 13th clusters are stored in the FAT entry. It will be linked in order. Next, 0xFFF is stored in the FAT entry corresponding to the 13th cluster, but since 0xFFF means the end of the link, the link starting from the 10th cluster ends up to the 13th cluster. Will do.

Further, 0 stored in the FAT entry corresponding to the 14th cluster means that the cluster is not assigned as data constituting the file and is a free area.
In FIG. 4, the FILE1. It shows that the data constituting the file named TXT is data 1, data 2, data 3 and data 4 divided into four clusters.

Next, updating of file contents in the FAT file system will be described.
In order to update the file contents, it is necessary to write new data constituting the file to the recording medium and rewrite the information of the directory entry, FAT1, and FAT2. If the update is stopped halfway due to the power supply of the information processing apparatus that is updating the file contents being cut off, the directory entry, FAT1 or FAT2, and the status of the data constituting the actual file are changed. Inconsistency occurs, the file storage position cannot be recognized correctly, and the file cannot be accessed.

Conventionally, when the update of a file is stopped halfway due to the occurrence of a power shutdown of the information processing device in the middle of the file update, the information processing device is then started as a method for resolving the above inconsistency related to the file. In such a case, a method for performing a file restoration process has been proposed (see, for example, Patent Document 1).
In the conventional method of executing the file recovery process, the directory entry, FAT1, and FAT2 are updated so as to be consistent with the new file contents in the state where the old file contents and the new file contents coexist at the time of updating the file in the recording medium. The procedure is determined in the order of FAT1, directory entry, and FAT2, and recovery information such as a flag indicating the procedure that has been processed is recorded at a specific position on the recording medium. Based on this recovery information, if the process is stopped during the update of FAT1, FAT2 is overwritten with FAT1 to return to the state before the file update. If the processing is stopped in the middle of updating the directory entry and FAT2, the directory entry is updated and FAT1 is overwritten on FAT2 to complete the file update processing. As a result, the inconsistency regarding the file is resolved, and the file is correctly recognized.
JP 2002-63057 A

By the way, in the above prior art, the recovery information recorded in the recording medium when the file in the recording medium is updated is unnecessary information when no inconsistency regarding the file occurs, that is, when no abnormality occurs. .
Therefore, from the viewpoint of effectively using the recording medium without waste for the purpose of file recording, which is the original purpose, it is desirable not to record information that is necessary only in an abnormal state on the recording medium.

  Therefore, the present invention makes it possible to eliminate inconsistencies relating to files that occur when file updating in a recording medium is stopped halfway without recording information that is necessary only in an abnormal state on the recording medium. An object of the present invention is to provide a file updating apparatus and the like.

  In order to achieve the above object, a file updating apparatus according to the present invention is detachable from a first recording medium on which position information indicating a storage position in a first recording medium of data constituting file contents is recorded. A file updating apparatus for updating a file in the first recording medium through a plurality of updating procedures, and the second recording medium and progress information indicating up to which updating procedure has been executed in the second recording medium Separately from the progress recording means for recording and the data constituting the file contents before the update, the new data recording means for recording the data constituting the file contents after the update in the first recording medium, and the new data recording means Update information recording means for recording, in the second recording medium, update information indicating the storage position in the first recording medium for the data constituting the recorded file content after the update, and in the updated file After the update information is recorded by the update information recording means on the data constituting the file, the content before the update of the file so as to indicate the storage position of the data in the first recording medium based on the update information And position information updating means for updating the position information in the first recording medium indicating the storage position of the data constituting the data.

  The file updating apparatus according to the present invention has the above-described configuration, so that when the position information in the first recording medium is updated by a plurality of procedures, the access mechanism to the first recording medium is turned off or the second information is updated. Even if the update is stopped due to the removal of one recording medium and the inconsistency occurs between the position information and the data storage position, the position information is updated later if the information in the second recording medium is used later. You will be able to complete it again. In addition, since the progress information and update information useful for resolving inconsistency at the time of abnormality are not held in the first recording medium on which the file is recorded, the area of the first recording medium can be used for recording the file without waste. Can be used.

  Also, even when the first recording medium is removed from the file update device, etc., normally meaningless information that is useful for resolving inconsistencies remains in the first recording medium. Assuming that this information can be browsed by the user, it can confuse the user. On the other hand, in the file updating apparatus according to the present invention, normally meaningless information is recorded on the second recording medium inside the apparatus instead of the detachable first recording medium and is not output outside. Therefore, the possibility of preventing confusion for the user who removes the first recording medium from the user for browsing is increased.

  Here, the progress information recorded by the progress recording means is information that can identify whether or not the update information is recorded for the data constituting the updated file content, and the file update device Further, when the predetermined condition is satisfied, it is determined based on the progress information whether update information is recorded for the data constituting the updated file content, and when the determination result is affirmative, Based on the update information, re-update means for updating the position information in the first recording medium so as to indicate the storage position of the data in the first recording medium may be provided.

  The predetermined condition is, for example, after the file update device is in the process of being updated and the file in the first recording medium cannot be updated due to the power interruption to the access mechanism to the first recording medium. For example, power is supplied from the power source. In other words, the condition is satisfied when it is necessary to execute file restoration, that is, re-update for eliminating the inconsistent state, and when an executable situation is reached. Therefore, the predetermined condition is a condition that the update is stopped halfway due to the removal of the first recording medium from the file update device in the middle of the update, and then the first recording medium is mounted in the file update device again. May be.

  As a result, even if the updating process is stopped halfway, after the predetermined condition is satisfied, for example, the FAT in the first recording medium is matched with the updated state of the file in the first recording medium. As a result, the positional information such as the directory entry can be re-updated. Even if the power to the first recording medium is interrupted during the file update, the second recording medium is separate from the power to the nonvolatile memory or the access mechanism of the first recording medium, for example. If the volatile memory is configured to be supplied with power from the power source for a long time, the above-described effects are exhibited unless the update information is specifically erased.

  The file update apparatus further includes a medium identification information recording unit that reads unique medium identification information from the first recording medium and stores the unique medium identification information in the apparatus before updating the file in the first recording medium. When the medium identification information of the recording medium mounted on the disk is read out, the read medium identification information and the held medium identification information are collated, and the two do not match, the position information by the re-update means It is good also as providing the re-update suppression means which suppresses update of these.

Thereby, only when the same recording medium as the updated one is mounted, the restoration of the file, that is, the position information is updated again so as to be consistent with the recording state of the data constituting the file content. Therefore, it becomes possible to prevent destruction of the contents of other recording media.
Further, the file update device sets a plurality of files in the first recording medium as update targets, and the position information in the first recording medium includes data constituting the file contents of all files in the first recording medium. The storage position is indicated, the progress recording means records progress information for each file to be updated, and the new data recording means has the contents of the updated file for each of the plurality of files to be updated. Is recorded in the first recording medium, and the update information recording means records the corresponding update information for each of the updated files recorded by the new data recording means. The information updating unit is configured to detect the position information in the first recording medium based on the update information about each file where the update information is recorded by the update information recording unit. The re-updating unit is configured to update the update information corresponding to the updated file based on the corresponding progress information for each of the plurality of files when the predetermined condition is satisfied. If it can be determined, the position information in the first recording medium may be updated based on the update information related to the file.

Thereby, even when a plurality of files are updated in parallel, the inconsistency of the position information in the first recording medium can be resolved so that the updated state is indicated for each file. Become. Note that the update information means, for example, information on the leading cluster and information indicating the links of the subsequent clusters for each file.
The file update apparatus further includes a close instruction acquisition unit that acquires a close instruction for a file for which data has been recorded by the new data recording unit, and the progress information recorded by the progress recording unit is for a file. Whether or not it is after the close instruction is acquired is also identifiable information, and the position information update means is after the update information is recorded on the data constituting the updated file contents and the close Only after the close instruction for the file is acquired by the instruction acquisition means, the position information in the first recording medium is updated based on the update information related to the file, and the re-update means When satisfied, for each of multiple files, the updated file based on the corresponding progress information The position information in the first recording medium is updated based on the update information relating to the file only when it can be determined that the corresponding update information has been recorded and the close instruction has been acquired. It is good to do.

  Thus, only after the time when the close instruction is acquired, the position information in the first recording medium is updated and re-updated so as to indicate the position of the data constituting the updated file content. For the file, the position information is not updated in the first recording medium. For example, when the file is updated several times, when the update is not completed, that is, before the closing, the position information in the first recording medium is the position of the data constituting the file content before the update. Therefore, updating of the position information is controlled by closing. Therefore, when a plurality of files form a group related to each other, the timing of all the files constituting the group is adjusted by closing each of them when the update of all the files is completed. The position information in the first recording medium can be updated.

  Further, the first recording medium indicates whether or not data constituting any file content is stored in the cluster for each cluster in the first recording medium, and constitutes the content of the same file. FAT information indicating that there is a connection between clusters in which data is stored, and directory information indicating a cluster in which the head of data constituting the file content is stored for each file in the first recording medium. And the positional information in the first recording medium excludes unused cluster information which is a part indicating a cluster in which no data constituting any file content is stored in the FAT information, The update information for each file recorded by the update information recording means is the new data. Continuation relation information indicating that there is a connection between clusters in the first recording medium in which data constituting the content of the updated file recorded by the recording means is stored, and configuring the content of the updated file And the location information update means configures the contents of the file for each file where the update information is recorded by the update information recording means. Based on the continuous relationship information related to the data, update the FAT information so as to indicate that there is a connection between the clusters in which the data constituting the updated file content recorded by the new data recording means is stored, In addition, based on the entry information related to the file, a class in which the head of the data constituting the updated file content is stored is stored. The renewal means updates the FAT information based on the continuous relationship information in the update information, and updates the directory information based on the entry information in the update information. The position information may be updated by updating.

  Thereby, it is necessary to restore in the first recording medium the abnormal stop at the time of updating the file in the first recording medium recorded according to the file system representing the position of each file by the FAT information and each directory information. This makes it possible to execute such information without special recording. Note that the continuous relationship information corresponds to a part of the main FAT or a part of the sub FAT shown in the embodiment.

  Further, the file update device further stores data constituting the content before update of the file after recording update information on the data constituting the file content after update by the update information recording means. The cluster in one recording medium includes unused area releasing means for recording unused information indicating that data constituting any file content is not stored in the second recording medium, and the position information updating means Updates the FAT information so that the unused information recorded by the unused area releasing means is reflected in the unused cluster information, and the re-update means updates the FAT information to update the unused information. It may be performed so as to be reflected in unused cluster information.

  Thereby, in response to the update of the file, the FAT information is updated so as to indicate the recording position of the data constituting the updated file content, and the cluster in which the data constituting the file content before the update is recorded is Even if an update process that updates the FAT information so as to indicate that it is an unused cluster is abnormally stopped in the middle, if there is an unused cluster later, it is appropriately treated as unused. As shown, the FAT information can be updated.

  The file updating apparatus further includes FAT copying means for copying FAT information in the first recording medium as work FAT information to a work FAT area, which is an area in the second recording medium, before updating all files; A closing instruction acquisition unit that acquires a closing instruction for a file whose data has been recorded by the new data recording unit, and the progress information recorded by the progress recording unit is after the closing instruction is acquired for the file Whether or not the new data recording means can update the data constituting the updated file based on the unused information or all the continuous relationship information and the work FAT information. Recording is performed in a cluster other than the cluster in which data constituting other file contents is recorded, and the update information recording means further includes the acquired cluster. The continuous relation information about the file related to the file instruction is reflected in the work FAT information, and any file content is stored in the cluster in the first recording medium in which the data constituting the content before the update of the file is stored. The unused information indicating that the data to be configured is not stored is also reflected in the work FAT information, the position information update means updates the FAT information based on the work FAT information, and the re-update means When the predetermined condition is satisfied, (a) for each of a plurality of files, when it can be determined that the close instruction for the file is obtained based on the corresponding progress information, the continuity relationship for the file Information and unused information are reflected in the work FAT information, (b) the FAT information is updated based on the work FAT information, and (c) the corresponding progress information is It is also possible to update the directory information based on the entry information of all the files that exhibit the close instruction for the file has been acquired.

  As a result, for a file that has been updated even before being closed, it is managed that the cluster in the first recording medium in which the data constituting the file content is recorded is not free, and only a new cluster is available for the free cluster. It is possible to record the data constituting the updated file contents and reflect the position of the data constituting the updated file contents in the FAT information and the directory information in the first recording medium only after closing. The

  The file updating apparatus further updates the position information to indicate the storage position of the data when the data constituting the updated file content is recorded on the first recording medium at the time of re-updating. An update reflection instruction acquisition means for acquiring an instruction indicating that the update should be performed, and the re-update means is when the predetermined condition is satisfied and the instruction is acquired by the update reflection instruction acquisition means Before the update of the FAT information based on the work FAT information, for each of a plurality of files, update information corresponding to the data constituting the updated file contents is recorded based on the corresponding progress information. Even when it can be determined later, the continuous relationship information and unused information related to the file may be reflected in the work FAT information.

Thus, depending on the instruction to the file updating apparatus, the FAT information in the first recording medium is updated if the data constituting the updated file content is recorded on the first recording medium even before the closing. It becomes possible to make it.
The first recording medium is composed of an authentication area that is independent of each other and provided with a predetermined access restriction, and a normal area that is not provided with the access restriction, and position information in the first recording medium is First location information indicating the storage position of the data constituting each file content in the authentication area in the authentication area, and the storage position of the data constituting the file content in the normal area in the normal area The progress information recorded by the progress recording means includes first progress information indicating which update procedure the file in the authentication area has been updated to, and in the normal area. Second update information indicating to which update procedure the update of the file has been performed, and the new data recording means, for the file in the authentication area, the data constituting the file content before the update. Separately, the data constituting the updated file contents is recorded in the authentication area, and the files in the normal area are configured separately from the data constituting the file contents before the update. The update information recorded by the update information recording means is recorded in the normal area, and the update information recorded by the new data recording means is stored in the authentication area for the data constituting the updated file content recorded in the authentication area. First update information indicating the storage position in the normal area, and second update information indicating the storage position in the normal area for the data constituting the updated file contents recorded in the normal area by the new data recording means The position information update means records the first update information by the update information recording means for the data constituting the updated file contents. Later, referring to the first update information, the first position information indicating the storage position of the data constituting the content before the update of the file so as to indicate the storage position of the data in the authentication area And after the second update information is recorded by the update information recording means on the data constituting the updated file content, the second update information is referred to and the data is stored in the normal area. As indicated by the position, the second position information indicating the storage position of the data constituting the content before the update of the file may be updated.

As a result, for a recording medium having both an authentication area and a normal area, a file can be restored for each area.
The first recording medium may be a flash memory, and the second recording medium may be a memory that can be accessed at a higher speed than the first recording medium.
As a result, when a file recorded in the flash memory is updated, if the update information necessary for restoration is recorded in the flash memory at any time, the flash memory records partial data due to its nature. Since the access speed is slow, the update process of the file is recorded in the memory that can be accessed at a higher speed than the flash memory, so that the delay of the file update process can be prevented to some extent. Become.

The second recording medium may be a RAM, and power may be supplied from a power source independent of the power source of the first recording medium.
As a result, even when the power to the first recording medium is cut off during the update of the file in the first recording medium and the updating stops, the power to the RAM is cut off at that time. There is no. As the RAM, as long as power is supplied, a relatively high-speed RAM of the type that retains recorded contents can be used. Normally, the update information in the RAM does not disappear even if the power to the first recording medium is cut off. Therefore, the restoration is performed using the update information after the power to the first recording medium is restored. Is possible.

  The file update method according to the present invention updates a file on the first recording medium in which position information indicating a storage position in the first recording medium of data constituting the file contents is recorded through a plurality of update procedures. In the file update method, the progress recording step for recording the progress information indicating which update procedure has been performed in the second recording medium and the data constituting the file content before the update A new data recording step for recording data constituting the file content in the first recording medium, and a storage position in the first recording medium for the data constituting the updated file content recorded by the new data recording step. Update information recording step for recording the update information shown in the second recording medium, and the update information recording step for the data constituting the file content after the update. After the update information is recorded by the group, the storage location of the data constituting the content before the update of the file is indicated based on the update information so that the storage location of the data in the first recording medium is indicated. And a position information update step of updating the position information in the first recording medium.

  As a result, when the position information in the first recording medium is updated in a plurality of procedures, the updating stops due to the power supply of the access mechanism to the first recording medium being disconnected or the first recording medium being removed during the updating. Even if inconsistency occurs between the information and the data storage position, if the information in the second recording medium is used later, the position information can be updated again later to be completed. In addition, since the progress information and update information useful for resolving inconsistency at the time of abnormality are not held in the first recording medium on which the file is recorded, the area of the first recording medium can be used for recording the file without waste. Can be used.

Hereinafter, an information processing apparatus according to an embodiment of a file updating apparatus of the present invention will be described with reference to the drawings.
<Embodiment 1>
<Configuration and usage data>
FIG. 5 is a configuration diagram of the information processing apparatus according to the first embodiment of the present invention.

The information processing apparatus 300 is, for example, a PC or a personal digital assistant (PDA), and includes a memory card slot for mounting an information recording medium 360 such as a memory card. 360 has a function of editing and updating a file in 360.
As shown in FIG. 5, the information processing apparatus 300 includes a CPU 310, a main power source 320, a non-volatile memory 330, a RAM 340, and an auxiliary power source 350. An input interface for accepting operations and a display for presenting information to the user are also provided.

Here, the main power source 320 is a rechargeable battery, and supplies power to each unit in the information processing apparatus 300 and the information recording medium 360. The main power source 320 cannot continue to supply power for a long period of time. For example, it is assumed that the remaining battery level becomes zero due to continuous use of the information processing apparatus for several hours or days.
The non-volatile memory 330 is a memory that stores a program that operates on the CPU 310, and particularly stores a file processing program 331 for realizing processing related to file update and restoration. System programs are also stored. Here, the term “restore” refers to re-updating information related to a file in order to eliminate an illegal state that occurs when the update is not completely completed due to a power interruption or the like in the file update process.

The RAM 340 is a memory that constantly receives power from the auxiliary power supply 350 and constantly holds data. Even if the power supply from the main power supply 320 to each part of the information processing apparatus 300 is stopped, the data in the RAM 340 is retained. Continue to be. The auxiliary power supply 350 is a primary battery that continues to supply power for a long period of time.
In the RAM 340, a main FAT 341 indicating a physical storage position of data in the information recording medium 360, a sub FAT 342 indicating a physical storage position of data newly recorded by updating a file, and an update target Open file information 343 corresponding to each file is stored. The main FAT 341 and the sub FAT 342 indicate data storage positions in cluster units in the information recording medium 360.

The open file information 343 includes entry information 344, processing status 345, and restoration information 346.
Here, the entry information 344 constitutes the name of the file to be updated, the number of the first cluster in which the data constituting the file content is stored (hereinafter also referred to as “start cluster number”), and the file content. It includes information such as data size (hereinafter also referred to as “file size”).

  The processing status 345 is information indicating the degree of progress of the update, that is, information indicating how far the file has been updated by a plurality of procedures. This processing status is changed in the course of the file update, and when the file update stops halfway and the information managing the file becomes inconsistent, the restoration process is performed to resolve the inconsistency. Will be referenced.

The restoration information 346 constitutes information necessary for returning information indicating the position of the file in the information recording medium on which the file is recorded to the state before the file is updated, that is, the file before the update. This is the number of the first cluster in which data is stored.
In addition, the information recording medium 360 mounted on the information processing apparatus 300 has data recorded therein managed by the FAT file system, and information for dividing the recording area into a plurality of partitions for management. Whether file configuration data is stored for each of the master boot record / partition table 361 to be stored, the partition boot sector 362 for storing management information in one partition, and a cluster which is a set of a predetermined number of sectors. In addition, there are FAT 363 and FAT 364 indicating the link relationship between clusters, a root directory entry 365 for storing information of files or directories existing immediately under the root directory, and a data area 366 for storing data constituting the file. do it That. Note that the FAT 363 and the FAT 364 are duplicated tables and are basically scheduled to have the same contents. Further, the link relationship between clusters is a connection between clusters storing data constituting the same file.

The recording position of the data constituting each file in the information recording medium 360 is specified by the directory entry stored in the root directory entry 365 or the directory entry stored in the data area 366 and the FAT 363 or FAT 364.
<Operation>
Hereinafter, the operation of the information processing apparatus 300 described above will be described.

  The information processing apparatus 300 starts from the time when the main power supply 320 starts supplying power in response to the user pressing the power button or the like by the execution of the file processing program 331 by the CPU 310, that is, from the time when the apparatus is started. At this time, if the file update is not completed and the process is abnormally terminated due to a power failure or the like, a restoration process described later is executed, and then the update preparation process is performed when the information recording medium 360 is loaded. After that, update processing described later is performed for each file.

The update preparation process is a process for copying the FAT 363 in the information recording medium 360 to the main FAT 341 in the RAM 340, clearing the sub FAT 342 to 0, and invalidating all the contents of the open file information.
FIG. 6 is a diagram illustrating a content example of the information recording medium 360 and a content example of the RAM 340 after the update preparation process is performed.

  As shown in the figure, a directory entry in the information recording medium 360 is FILE1. It shows a 42 KB file having a file name of TXT, and also shows that data constituting the file is stored from the third cluster. In the data area in the figure, a portion filled with a diagonal line pattern indicates a cluster in which data constituting the file is stored.

  The FAT in the figure is representative of FAT1 and FAT2 which are basically the same contents, and in this example, the third, fourth and fifth clusters are linked. FILE1.. And FILE1. It turns out that the data constituting the file having the file name TXT is recorded in this order in the third, fourth and fifth clusters. The FAT entry corresponding to the fifth cluster stores 0xFFF, which means that the data constituting the file in this cluster ends, that is, the end of the cluster link. In addition, 0 is stored in the FAT entries corresponding to the sixth and seventh clusters, which means that data constituting the file is not stored in these clusters.

  In addition, as a result of the update preparation process, a main FAT that is a copy of the FAT of the information recording medium 360, a sub FAT set to all 0 values, and invalidated open file information are stored in the RAM 340. The Note that invalid open file information is stored means that valid open file information is not stored.

Hereinafter, update processing realized by a part of the file processing program 331 in the information processing apparatus 300 will be described.
FIG. 7 is a flowchart illustrating an overview of update processing by the information processing apparatus 300.
This update process is executed independently for each file to be updated, and it is assumed that a plurality of files can be executed in parallel. The file processing program 331 executes the update process when a file update is requested when executing the application program or the system program.

  First, the information processing apparatus 300 copies the original data so that the file in the information recording medium 360 can be returned to the state before the update when the update is not completely completed. (Step S11), and the updated data recording process for recording the updated data in the information recording medium 360 is executed until the close instruction is acquired in accordance with the update of the file (steps S12, S13). ) When a close instruction indicating completion of update is acquired, a close process is executed (step S14), and information for managing the location of data constituting the updated file is recorded in the information recording medium 360. The management information recording process is executed (step S15). The close instruction is issued from an application program or a system program in response to a user operation or based on a predetermined condition determination.

Hereafter, each processing content of step S11, S12, S14, and S15 is demonstrated in detail, using the example of the data which changes with the processing.
FIG. 8 is a flowchart showing the open process by the information processing apparatus 300.
First, the information processing apparatus 300 that executes the file processing program 331 by the CPU 310 acquires the directory entry for the file that is the update target by the application program or the system program from the information recording medium 360, and stores the directory entry in the open file information in the RAM 340. The entry information is written (step S501). Note that the processing status in the open file information is set to “0”.

  Subsequently, the information processing apparatus 300 refers to the file size in the directory entry acquired in step S501 and searches the main FAT 341 and the sub FAT 342 in the RAM 340 for a free area of the file size in the data area 366. (Step S502). If there is no free space, an error message is displayed on the display and the update process is terminated. In the search in step S502, it is determined that a cluster whose FAT entry content is 0 in both the main FAT 341 and the sub FAT 342 is empty.

  Subsequent to step S502, the information processing apparatus 300 refers to the start cluster number in the directory entry acquired in step S501, records it as restoration information in the open file information (step S503), and starts the searched free area. The cluster number is recorded as the starting cluster number of the entry information in the open file information (step S504).

  Next, the information processing apparatus 300 writes a link to the FAT entry in the sub FAT 342 corresponding to the searched free area cluster (S505), and the update target file is stored in the cluster in the information recording medium 360 that was the free area. Is copied (S506). The information processing apparatus 300 repeats the processes in steps S505 and S506 until all the data of the update target file is copied in units of clusters (S507). When the copying of all the data constituting the file to be updated is completed, “1” is set as the processing status in the open file information for the file (step S508).

  In this way, in the open process, information on the file to be updated is read into the RAM and preparation for file access is made, and data constituting the file contents to be updated is copied to a free area on the information recording medium. Since the process is performed on the copied data, the file can be restored to the open state when the update process is stopped in the middle.

FIG. 9 is a diagram illustrating a data state after the open process.
In the figure, FILE1. An example in which a file named TXT is an update target is shown, and the data constituting the file is recorded in the third, fourth, and fifth clusters before the update. And the main FAT indicate that FAT entries corresponding to the third, fourth, and fifth clusters have values other than zero.

Since the file size is 42 KB, it is assumed that the clusters of No. 6, No. 7, and No. 8 are searched in the example of FIG. Here, the capacity of the information recording medium 360 is 64 MB, and an example in which one cluster is 16 KB is shown.
Further, in step S503, the starting cluster number 3 in the directory entry is recorded in the restoration information, the starting cluster number of the entry information is set to 6 in step S504, and the sub FATs Nos. 6 to 8 are set in steps S505 to S507. A link is stored in the FAT entry corresponding to the cluster No., and the data constituting the file before the update is copied to the clusters No. 6 to No. 8, and the status after the processing status is set to “1” in Step S508 Is shown in FIG.

FIG. 10 is a flowchart showing post-update data recording processing by the information processing apparatus 300.
The information processing apparatus 300 determines a writing position from the main FAT 341 and the sub FAT 342 (step S701), and records data constituting the updated file content at the determined position in the information recording medium 360 (step S702). When overwriting data, the sub FAT 342 is referred to determine the overwrite position based on the original data. When adding data, the empty area is searched from the main FAT 341 and the sub FAT 342 to determine the write position. The updated file contents are determined by an application program or a system program in accordance with a user operation or the like or based on a predetermined calculation.

  After recording the data in step S702, the information processing apparatus 300 updates the link in the sub FAT 342 so as to correspond to the cluster in which the data is recorded when the FAT is to be changed by the recording (step S703). If the file size is changed, the file size in the entry information in the open file information for the file is updated (step S704), and then “2” is set in the processing status in the open file information ( Step S705).

FIG. 11 is a diagram illustrating the data state after the post-update data recording process.
This figure shows the state following FIG. The state (steps S701 and S702) in which the contents of the 7th cluster in which data constituting the file content named TXT is stored is overwritten and updated, and the 9th cluster is added as the data constituting the file contents. Appear in the data area.

Further, FIG. 11 shows that the FAT entry of the sub FAT is updated (step S703), and that clusters are continuous from No. 6 to No. 9, and the file size in the entry information is changed from 42 KB to 60 KB. It has been updated (step S704) and the processing status is set to “2” (step S705).
FIG. 12 is a flowchart illustrating the closing process by the information processing apparatus 300.

The information processing apparatus 300 sets “3” as the processing status in the open file information for the file to be updated (step S901), and then acquires the start cluster number in the entry information (S902).
Subsequent to step S902, the information processing apparatus 300 obtains a link starting from the acquired start cluster number from the sub FAT 342, copies it to the main FAT 341 (step S903), and completes copying of all links. The link is released (step S904). The link is released by changing the contents of the FAT entry to a value of 0 when the FAT entry corresponding to a certain cluster has a value of another cluster or a value of 0xFFF.

  After finishing step S904, the information processing apparatus 300 sets “4” as the processing status in the open file information for the file to be updated (step S905), and then indicates the start cluster number before the update. The starting cluster number is obtained by referring to the restoring information indicating the leading cluster number storing the restoration information, that is, the data constituting the file contents before the update (step S906). The link starting from the FAT entry corresponding to the numbered cluster is released from the main FAT (step S907), and the processing status is set to “5” (step S908).

FIG. 13 is a diagram illustrating a data state after execution of step S903 in the close process. This figure shows a state following FIG.
6 is acquired as the starting cluster number from the entry information (step S902), and the contents of the FAT entries corresponding to the seventh, eighth and ninth clusters linked from the FAT entry corresponding to the sixth cluster in the sub FAT are indicated. The state copied to the main FAT (step S903) appears in FIG.

FIG. 14 is a diagram illustrating how the main FAT is updated in a situation where a plurality of files are to be updated and update processing is being performed in parallel.
In step S903 in the close process, the link information in the sub FAT related to the data constituting the file is copied to the main FAT only for the file that has been subjected to the close process. In the example shown in the figure, FILE1. For a file named TXT, information indicating a cluster in which data constituting the updated file content is stored is copied from the sub FAT to the main FAT, but the close instruction has not yet been acquired, that is, being updated. FILE2. As for a file named TXT, information indicating a cluster in which data constituting the updated file content is stored exists only in the sub FAT, and is not copied to the main FAT. Since the main FAT is copied to the FAT in the information recording medium 360 by the management information recording process to be described later, information indicating the location of data constituting the updated file is recorded in the FAT only for the closed file. Will be.

FIG. 15 is a diagram illustrating a data state after execution of step S905 in the close process. This figure shows a state following FIG.
In the sub-FAT shown in FIG. FIG. 15 shows that the link information indicating the cluster storing the data constituting the file contents after the TXT update is cleared in step S904, and the processing status is set to 4 in step S905. This is shown in FIG.

FIG. 16 is a diagram exemplifying a data state after the closing process is completed. This figure shows a state following FIG.
In the main FAT shown in FIG. FIG. 16 shows that the link information indicating the cluster in which the data constituting the file contents before the TXT update is stored is cleared in step S907, and the processing status is set to 5 in step S908. Appears.

FIG. 17 is a flowchart showing management information recording processing by the information processing apparatus 300.
After performing the close process, the information processing apparatus 300 updates the FAT by copying the contents of the main FAT 341 in the RAM 340 to the FAT area in the information recording medium 360 (step S1301). Specifically, copying to the FAT area refers to copying to both FAT1 and FAT2.

  Following the update of the FAT, the information processing apparatus 300 writes so that the entry information included in the open file information for the closed file in the RAM 340 is reflected in the directory entry of the corresponding file in the information recording medium 360. (Step S1302), the open file information is cleared and the processing status is set to 0 (Step S1303), and the management information recording process is terminated.

FIG. 18 is a diagram illustrating a data state after execution of the management information recording process. This figure shows a state following FIG.
In the FAT shown in FIG. The link information indicating the cluster in which the data constituting the file contents before the TXT update is stored, that is, the value stored in the FAT entry corresponding to the third to fifth clusters is cleared to 0 in step S1301. In addition, the directory entry has been updated and FILE1. FIG. 18 shows that the open file information regarding TXT is cleared.

Hereinafter, a restoration process realized by a part of the file processing program 331 in the information processing apparatus 300 will be described.
In the restoration process, if the file update is not completed because the main power supply is shut off, etc., and the process is stopped halfway, the battery, which is the main power supply, is recharged after the main power supply can be supplied next. This process is executed after the user performs an operation to turn on the power.

FIG. 19 is a flowchart showing the restoration process by the information processing apparatus 300.
When starting the restoration process, the information processing apparatus 300 first pays attention to each open file information held in the RAM 340 in order, and determines the processing status therein (step S1501). If the processing status is “3” as a result of the determination, the link starting from the FAT entry of the start cluster number in the entry information in the open file information of interest and continuing to the FAT entry whose content is 0xFFF Search from the FAT, copy the contents of those FAT entries to the FAT entries corresponding to the same cluster of the main FAT, clear the contents of those FAT entries in the sub-FAT to 0 (step S1502), and set the processing status. “4” is set (step S1503).

When the processing status is “3” and stopped, it indicates that the update processing has stopped while copying the link from the sub FAT to the main FAT or releasing the link on the sub FAT. Therefore, step S1502 is executed in the restoration process.
If the update process is stopped while releasing the link on the sub FAT, the link information on the sub FAT corresponding to the start cluster number in the entry information is set to 0. In step S1502, the main FAT is searched for a link that starts from the FAT entry of the start cluster number in the entry information and continues to the FAT entry whose content is 0xFFF, and the contents of the FAT entry on the sub FAT corresponding to the same cluster. Is cleared to 0.

  When step S1503 is executed, or when the processing status is “4” as a result of the determination in step S1501, the information processing apparatus 300 indicates the restoration information of the entry information in the open file information of interest. However, the start cluster number of the data constituting the file contents before the update is obtained, all the values in the FAT entry linked from the FAT entry on the main FAT corresponding to the start cluster number are cleared to 0, and the link Is released (step S1504), and the processing status is set to “5” (step S1505).

  In addition, even if the processing is stopped while releasing the link on the main FAT, the cluster number of the link before release and the cluster number of the link after release are included in the restoration information when releasing the link so that the link can be correctly released in the restoration process. And the cluster number of the link before release is released. Note that the cluster number of the link before release and the cluster number of the link after release are recorded in the restoration information at once, that is, by executing one instruction.

  For example, when releasing the links of cluster numbers 3, 4, and 5, after storing 3 and 4 in the restoration information, 0 indicating a free area is set in the FAT entry corresponding to cluster number 3 on the main FAT. Next, after the restoration information is changed to 4 and 5, 0 indicating the empty area is set in the FAT entry corresponding to the cluster number 4 on the main FAT. Finally, after the restoration information is set to 5, 0xFFF, 0 indicating a free area is set in the FAT entry corresponding to the cluster number 5 on the main FAT, and 0 is set in the restoration information. By releasing the main FAT according to this procedure, even if the process is stopped during the release, the release can be continued in the next restoration process.

  After step S1505 is completed, or when the processing status of the open file information of interest is one of “0”, “1”, “2”, “5”, the information processing apparatus 300 It is determined whether or not all open file information has already been focused (step S1506). If there is unfocused open file information, the process returns to step S1501 with attention focused on all open file information, and all open file information has been focused. If so, the contents of the main FAT in the RAM 340 are copied to the FAT1 and FAT2 in the information recording medium 360 (step S1507).

  Subsequent to step S1507, the information processing apparatus 300 searches for all open file information having a processing status of “5”, and stores each entry information for all the searched open file information as an information recording medium. Writing is performed so as to be reflected in the directory entry of the corresponding file in 360 (step S1508), all open file information is cleared to 0, and the restoration process is terminated.

As a result of the above restoration process, for files that have been suspended during the update process after the file close instruction is acquired, the file is restored to the updated state, and the update process is in progress before the close instruction is acquired. For files that were stopped in step 1, the files are restored to the open state, that is, the state before the update. Note that since each file is restored according to the processing status, focusing on each of the file open information, even if multiple files are updated in parallel, depending on the progress of the update of each file. Thus, it is possible to restore the file appropriately, that is, to re-update the FAT and directory entry for managing the file so as to be in a consistent state.
<Embodiment 2>
<Configuration and usage data>
FIG. 20 is a configuration diagram of an information processing apparatus according to the second embodiment of the present invention.

  The information processing apparatus 1300 according to the second embodiment has almost the same configuration as the information processing apparatus 300 shown in the first embodiment, but is different in that it performs update processing and restoration processing on files without using a sub FAT. Different from the device 300. Note that, among the components of the information processing apparatus 1300 in FIG. 20, the same reference numerals are used for the same elements as the information processing apparatus 300.

  In this information processing apparatus 1300, when the file in the information recording medium 360 is repeatedly updated, the last update is reflected in the FAT or directory entry in the information recording medium 360 even if the file closing instruction is not given. Is done. Then, when the update process is stopped due to the main power supply shut off during the update process, the file is restored by the subsequent restore process. The data is already updated and the information indicating the updated position is stored in the RAM. If it has been done, it is realized by re-updating FAT or the like so that the last update has been made.

As shown in FIG. 20, the information processing apparatus 1300 includes a CPU 310, a main power source 320, a non-volatile memory 1330, a RAM 1340, and an auxiliary power source 350. An input interface for accepting operations and a display for presenting information to the user are also provided.
Here, the non-volatile memory 1330 is a memory that stores a program that operates on the CPU 310, and in particular, file processing for realizing processing related to update and restoration of a file that enables update before closing. A program 1331 is stored, and application programs, system programs, and the like (not shown) are also stored.

  The RAM 1340 is a memory that constantly receives power from the auxiliary power supply 350 such as a battery and constantly holds data. Even if the power supply from the main power supply 320 to each part of the information processing apparatus 1300 is stopped, the RAM 1340 Data will continue to be retained. The RAM 1340 stores a main FAT 1341 used for work for updating the FAT in the information recording medium 360 and open file information 1343 corresponding to each file to be updated. The main FAT 1341 indicates a data storage position in cluster units in the information recording medium 360.

  The open file information 1343 includes entry information 1344, processing status 1345, and restoration information 1346. Here, the entry information 1344 is the same as the entry information 344, and the processing status 1345 indicates information indicating the degree of progress of the update, that is, up to which procedure the file has been updated by a plurality of procedures. Information. This processing status 1345 is sequentially changed during the process of updating the file, and when the file update is stopped in the middle and an inconsistency occurs in the information managing the file, a restoration process is performed to eliminate the inconsistency Will be referred to.

The restoration information 1346 is information necessary for restoration, and is the number of the first cluster (hereinafter referred to as “new link start cluster number”) in which data constituting the updated file content is stored, and before the update. And the number of the first cluster (hereinafter referred to as “update start cluster number”) in which the data constituting the file contents is stored.
<Operation>
Hereinafter, the operation of the information processing apparatus 1300 will be described.

  The information processing apparatus 1300 starts from the time when the main power supply 320 starts supplying power in response to the user pressing the power button or the like by the execution of the file processing program 1331 by the CPU 310, that is, from the time when the apparatus is started. At this time, if the file update is not completed and the process is abnormally terminated due to a power failure or the like, a restoration process described later is executed, and then the update preparation process is performed when the information recording medium 360 is loaded. After that, update processing described later is performed for each file.

The update preparation process is a process of copying the FAT 363 in the information recording medium 360 to the main FAT 1341 in the RAM 1340 and invalidating all the contents of the open file information.
As a result of the update preparation process, the main FAT 1341, which is a copy of the FAT of the information recording medium 360, and invalidated open file information are stored in the RAM 1340. Note that invalid open file information is stored means that valid open file information is not stored.

Hereinafter, update processing realized by a part of the file processing program 1331 in the information processing apparatus 1300 will be described.
FIG. 21 is a flowchart illustrating an overview of update processing by the information processing apparatus 1300.
This update process is executed independently for each file to be updated, and it is assumed that a plurality of files can be executed in parallel. The file processing program 1331 executes this update processing when a file update is requested when executing the application program or the system program.

  First, the information processing apparatus 1300 executes an open process (step S21), and updates the file to record the updated data in the information recording medium 360 until the close instruction is acquired according to the update of the file. When processing is executed (steps S22 and S23) and a close instruction signifying completion of update is acquired, information for managing the location of data constituting the updated file is recorded in the information recording medium 360. The management information recording process is executed (step S24).

Hereinafter, for each processing content of steps S21, S22, and S24, FILE1. An update for a file named TXT will be described in detail as an example.
FIG. 22 is a flowchart showing an open process by the information processing apparatus 1300.
The information processing apparatus 1300 first acquires a directory entry for the file to be updated from the information recording medium 360 and records it as entry information included in the open file information in the RAM 1340 (step S1601). In other words, the entry information of one open file information includes FILE1. The TXT file name, update start cluster number, and file size are set.

Subsequently, the information processing apparatus 1300 sets “11” as the process status in the open file information for the file to be updated (step S1602), and ends the open process.
FIG. 23 is a flowchart showing file update processing by the information processing apparatus 1300.

  The information processing apparatus 1300 refers to the file size recorded as the entry information in the open process and searches the main FAT 1341 in the RAM 1340 for an empty area of the file size (step S1701). In the search in step S1701, it is determined that a cluster in which the content of the FAT entry is 0 in the main FAT 1341 is empty.

  Subsequent to step S1701, the information processing apparatus 1300 records the new link start cluster number that is the cluster number of the free area and the update start cluster number of the file in the restoration information in the open file information of the file to be updated. (Step S1702), “12” is set in the processing status (Step S1703). In step S1702, the new link start cluster number is also set as the start cluster number in the entry information.

  Subsequent to step S1703, the information processing apparatus 1300 writes the data constituting the updated file contents in the free area in the data area 366 of the information recording medium 360 (step S1704), and links each cluster into which the data has been written. As shown, the main FAT is updated (step S1705), the file size in the entry information is updated to indicate the size of the written data (step S1706), and the processing status is set to “13” (step S1707). ).

After step S1707, the information processing apparatus 1300 releases the link indicating the cluster in which the data constituting the file content before update is stored from the main FAT in the RAM 1340 (step S1708), and sets “14” as the processing status. Setting is performed (step S1709), and the file update process is terminated.
FIG. 24 is a diagram illustrating a data state after execution of step S1703 in the file update process.

As shown in the example of the contents of the information recording medium in the figure, the data constituting the contents of the file in the information recording medium 360 to be updated is stored in the third, fourth, and fifth clusters in the data area 366. The file name of the file is FILE1. It is TXT and the file size is 42 KB.
The figure also shows FILE1. As the restoration information in the open file information for the file named TXT, 3 which is the number of the first cluster in which the data constituting the file content before the update is stored is set as the update start cluster number, and step S1701 is performed. The number 6 of the free cluster that is the search result of this and that is scheduled to store the updated file contents is set as the new link start cluster number, and the processing status is set to “12”. It shows the state.

FIG. 25 is a diagram exemplifying a data state after execution of step S1707 in the file update process. This figure shows a state following FIG.
In FIG. 25, the data constituting the updated file contents is recorded in the sixth to ninth clusters in the information recording medium 360 in step S1704, and the sixth data of the main FAT is recorded in step S1705. A value indicating that the sixth to ninth clusters are continuous is set in the ninth to ninth FAT entries, and the file size in the entry information is updated to 60 KB in step S1706. A state in which “13” is set as the processing status in S1707 is shown.

FIG. 26 is a diagram illustrating a data state after the file update process is completed. This figure shows a state following FIG.
In FIG. 26, the link related to the cluster in which the data constituting the file contents before update is stored from the main FAT is released from the main FAT in step S1708, that is, corresponding to the third, fourth, and fifth clusters. The contents of the FAT entry on the main FAT are cleared to 0, and “14” is set as the processing status.

  In addition, even if the processing is stopped while releasing the link on the main FAT, the cluster number of the link before release and the cluster number of the link after release are included in the restoration information when releasing the link so that the link can be correctly released in the restoration process. And the cluster number of the link before release is released. For example, when releasing the links of cluster numbers 3, 4, and 5, after storing 3 and 4 in the restoration information, 0 indicating a free area is set in the FAT entry corresponding to cluster number 3 on the main FAT. Next, after the restoration information is changed to 4 and 5, 0 indicating the empty area is set in the FAT entry corresponding to the cluster number 4 on the main FAT. Finally, after the restoration information is set to 5, 0xFFF, 0 indicating a free area is set in the FAT entry corresponding to the cluster number 5 on the main FAT, and 0 is set in the restoration information. By releasing the main FAT according to this procedure, even if the process is stopped during the release, the release can be continued in the next restoration process. By releasing the link in such a procedure, 0 is set in the restoration information in FIG.

FIG. 27 is a flowchart showing management information recording processing by the information processing apparatus 1300.
As shown in the figure, the information processing apparatus 1300 first updates the FAT by copying the main FAT to the FAT area in the information recording medium 360 (step S2101). Specifically, copying to the FAT area refers to copying to both FAT1 and FAT2. Subsequent to the FAT update, the information processing apparatus 1300 writes the entry information included in the open file information in the RAM 1340 for the file to be reflected in the directory entry of the corresponding file in the information recording medium 360 (step S2102), the open file information is cleared and the processing status is set to 0 (step S2103), and the management information recording process is terminated.

Hereinafter, a restoration process realized by a part of the file processing program 1331 in the information processing apparatus 1300 will be described.
FIG. 28 is a flowchart showing restoration processing by the information processing apparatus 1300.
When the information processing apparatus 1300 starts the restoration process, the information processing apparatus 1300 first pays attention to the order of each open file information held in the RAM 1340, and determines the processing status therein (step S2201). As a result of the determination, step S2202, step S2204 or step S2206 is performed according to the processing status.

  If the processing status is “12” as a result of the determination in step S2201, the new link start cluster number in the restoration information in the open file information of interest is referred to, and the cluster number on the main FAT 1341 is supported. The link starting from the FAT entry to be released is released (step S2202), and the processing status is set to “11” (step S2203).

  It should be noted that the new link start cluster number of the restoration information is updated at the time of link release so that the link release can be resumed correctly even if the execution of processing is stopped in the middle of the link release in step S2202. After storing the cluster number before release and the cluster number after release, the cluster number stored as before release is overwritten with 0. For example, when releasing the links of the third, fourth, and fifth clusters, first, 3 and 4 are stored in the restoration information, and then a free area is indicated in the FAT entry corresponding to the third cluster on the main FAT. After 0 is set, and then the restoration information is changed to 4, 5 and then, the FAT entry corresponding to the fourth cluster on the main FAT is set to 0, and finally the restoration information is set to 5, 0xFFF Thus, 0 is set in the FAT entry corresponding to the fifth cluster on the main FAT. By releasing the link on the main FAT in this procedure, the release can be continued in the next restoration process even if the execution of the process is stopped during the release.

  As a result of the determination in step S2201, if the processing status is “13”, the update start cluster number in the restoration information in the focused open file information is referred to and corresponds to the cluster number on the main FAT 1341. The link starting from the FAT entry is released (step S2204), and the processing status is set to “14” (step S2205). In step S2204, as in step S2202, when the link is released, the update information update start cluster number is updated, the cluster number before release and the cluster number after release are stored, and then released. The link is released using the procedure of overwriting the previously stored cluster number with 0.

  After step S2203 or step S2205 ends, or when the processing status of the open file information of interest is one of “0”, “11”, and “14”, the information processing apparatus 1300 It is determined whether or not the open file information has already been focused (step S2206), and if there is unfocused open file information, the process returns to step S2201 while paying attention, and all open file information has been focused. If there is, the contents of the main FAT in the RAM 1340 are copied to FAT1 and FAT2 in the information recording medium 360 (step S2207).

  Subsequent to step S2207, the information processing apparatus 1300 retrieves all open file information having a processing status of “14”, and stores each entry information for all retrieved open file information as an information recording medium. Writing is performed so as to be reflected in the directory entry of the corresponding file in 360 (step S2208), and the restoration process is terminated.

Through the above restoration process, information about the location where the data is stored is stored in the RAM after the data constituting the updated file is recorded in the information recording medium, that is, the main FAT and After the position is represented by the entry information, the file is restored to the state after the update. In other cases, the file is restored to the state before the update. Note that since each file is restored according to the processing status, focusing on each of the file open information, even if multiple files are updated in parallel, depending on the progress of the update of each file. Thus, it is possible to restore the file appropriately, that is, to re-update the FAT and directory entry for managing the file so as to be in a consistent state.
<Embodiment 3>
Hereinafter, the file update / restore function of the information processing apparatus 300 shown in the first embodiment and the file update / restore function of the information processing apparatus 1300 shown in the second embodiment are combined in units of files. An information processing apparatus (hereinafter referred to as “composite information processing apparatus”) that is selectively applied will be described.

The composite information processing apparatus combines the constituent elements of the information processing apparatus 300 and the information processing apparatus 1300.
In this composite information processing apparatus, when each file is to be updated, that is, when it is opened, an application program or system program that reflects a user operation or the like is actually used before the closing as described in the first embodiment. It is assumed that a selection is made as to whether the update is not valid or whether the last update is valid even before closing as shown in the second embodiment. In response to the selection designation, the composite information processing apparatus performs either the update process shown in FIG. 7 or the update process shown in FIG. 21 for the file to be updated. However, step S1701 of the file update process (see FIG. 23) in the update process shown in FIG. 21 is applied with a slight modification, and a free area is not searched only from the main FAT but from the main FAT and the sub FAT. To search for.

Hereinafter, restoration processing realized by the file processing program in the composite information processing apparatus will be described.
FIG. 29 is a flowchart showing restoration processing by the composite information processing apparatus.
When starting the restoration process, the composite information processing apparatus first pays attention to the respective open file information held in the RAM in order, and determines the processing status therein (step S2401). As a result of the determination, step S2402, step S2403, step S2404, step S2405, or step S2406 is performed according to the processing status.

  If the processing status is “3” as a result of the determination in step S2401, the processing starts from the FAT entry of the start cluster number in the entry information in the open file information of interest and continues to the FAT entry whose content is 0xFFF. Search for links from the sub-FAT, copy the contents of those FAT entries to the FAT entry corresponding to the same cluster of the main FAT, clear the contents of those FAT entries in the sub-FAT to 0, and set the processing status to “ 4 ″ is set (step S2402).

  When the processing status is “4” as a result of the determination in step S2401, or after executing step S2402, the composite information processing apparatus indicates the restoration information of the entry information in the open file information of interest. The start cluster number of the data constituting the file contents before update is obtained, all the values in the FAT entry linked from the FAT entry on the main FAT corresponding to the start cluster number are cleared to 0, and the link is It is released and “5” is set in the processing status (step S2403).

As a result of the determination in step S2401, if the processing status is “12”, the new link start cluster number in the restoration information in the focused open file information is referred to and corresponds to the cluster number on the main FAT. The link starting from the FAT entry is released and “11” is set in the processing status (step S2404).
If the processing status is “13” as a result of the determination in step S2401, the update start cluster number in the restoration information in the focused open file information is referred to, and the FAT corresponding to the cluster number on the main FAT is displayed. The link starting from the entry is released, and “14” is set in the processing status (step S2405).

  After step S2403, step S2404, or step S2405 is completed, or the processing status of the open file information of interest is any of “0”, “1”, “2”, “5”, “11”, “14” If it is, the composite information processing apparatus determines whether or not all open file information has already been focused (step S2406), and if there is unfocused open file information, focuses on that and proceeds to step S2401. Returning to the process, if all the open file information has been focused, the contents of the main FAT in the RAM are copied to the FAT1 and FAT2 in the information recording medium 360 (step S2407).

Subsequent to step S2407, the composite information processing apparatus retrieves all pieces of open file information having a processing status of “5” or “14”, and obtains each entry information for all of the retrieved open file information. Then, writing is performed so as to be reflected in the directory entry of the corresponding file in the information recording medium 360 (step S2408), and the restoration process is terminated.
<Embodiment 4>
<Configuration and usage data>
FIG. 30 is a configuration diagram of an information processing apparatus according to the fourth embodiment of the present invention.

  The information processing apparatus 2300 according to the fourth embodiment is, for example, a personal digital assistant (PDA) or a mobile phone, and includes a slot for mounting an information recording medium 2370 that is a semiconductor memory card such as an SD memory card. And has a function of editing and updating a file in the loaded information recording medium 2370. SD memory card is a trademark of Matsushita Electric Industrial Co., Ltd., SanDisk Corporation of the United States, and Toshiba Corporation.

  An information recording medium 2370 attached to the information processing apparatus 2300 includes a medium identifier (medium ID) 2371, and has an authentication area 2372 and a normal area 2376 as recording areas, and further authentication and data from the outside. Has a control unit 2780 for performing control related to the exchange of information. The authentication area is an area for recording files and the like necessary for mutual authentication with the information processing apparatus 2300 and is subjected to predetermined access restrictions. The normal area is used for purposes other than authentication. This is an area for recording a file made up of images, sounds and other data, with no particular access restrictions.

  Data recorded in the authentication area 2372 and the normal area 2376 are managed by the FAT file system. The authentication area 2372 includes a FAT 2373, a root directory entry 2374, and a data area 2375. , FAT 2377, root directory entry 2378, and data area 2379.

  As shown in FIG. 30, the information processing apparatus 2300 includes a CPU 310, a main power source 320, a non-volatile memory 2330, a RAM 2340, and an auxiliary power source 350. An input interface for accepting operations and a display for presenting information to the user are also provided. Of the constituent elements of the information processing apparatus 2300, the same constituent elements as those of the information processing apparatus 300 are denoted by the same reference numerals as in FIG. 5, and detailed description thereof is omitted here.

  Here, the non-volatile memory 2330 is a memory storing a program that operates on the CPU 310, and in particular, a medium ID acquisition program 2331 for acquiring a medium ID unique to the medium from the information recording medium 2370, and an authentication An authentication file processing program 2332 for realizing processing related to file update and restoration in the area and a normal file processing program 2333 for realizing processing relating to file update and restoration in the normal area are stored, not shown. Application programs and system programs are also stored.

The RAM 2340 is a memory that constantly receives power from the auxiliary power supply 350 such as a battery and constantly holds data. Even if the power supply from the main power supply 320 to each part of the information processing apparatus 2300 is stopped, the RAM 2340 Data will continue to be retained.
In the RAM 2340, medium information 2341 set with a medium ID acquired from the information recording medium 2370 by the medium ID acquisition program 2331 as a value, an authentication main FAT 2342 indicating a physical storage position of data in the authentication area, Authentication sub FAT 2343 indicating the physical storage location of data newly recorded in the authentication area by updating the file, normal main FAT 2345 for use in data update work in the normal area, and the file to be updated in the authentication area Authentication open file information 2344 corresponding to each file and normal open file information 2346 corresponding to each file to be updated in the normal area are stored. The authentication main FAT 2342, the authentication sub FAT 2343, and the normal main FAT 2345 indicate the storage positions of data in cluster units in the information recording medium 360.

  Here, the authentication open file information 2344 has the same data format as the open file information 343 shown in the first embodiment, and includes entry information 2361, processing status 2362, and restoration information 2363. The normal open file information 2346 has the same data format as the open file information 1343 shown in the second embodiment, and includes entry information 2364, a processing status 2365, and restoration information 2366.

<Operation>
Hereinafter, the operation of the information processing apparatus 2300 will be described.
The information processing apparatus 2300 starts from the time when the main power supply 320 starts to supply power in response to the user pressing the power button or the like by the execution of each program by the CPU 310, that is, from the time when the apparatus is activated, If the file update is not completed and the process is abnormally terminated due to a power interruption or the like, the restoration process described later is executed, and then the update preparation process is performed when the information recording medium 2370 is mounted. Thereafter, update processing is performed for each file.

  As the update preparation process, the information processing apparatus 2300 first executes the medium ID acquisition program 2331 by the CPU 310 when the information recording medium 2370 is loaded, and the execution of the medium ID acquisition program 2331 The information processing apparatus 2300 performs mutual authentication according to a predetermined authentication procedure with the control unit 2780 of the information recording medium 2370, and when the authentication is successful, that is, a legitimate information processing apparatus and a legitimate information recording medium When the above relationship is satisfied, the medium ID 2371 in the information recording medium 2370 is acquired via the control unit 2780 and stored in the RAM 2340 as the medium information 2341. Subsequently, as an update preparation process, the information processing apparatus 2300 copies the FAT 2373 in the information recording medium 2370 to the authentication main FAT 2342 in the RAM 2340, and copies the FAT 2377 in the information recording medium 2370 to the normal main FAT 2345 in the RAM 2340. The contents of the authentication open file information and the contents of the normal open file information are all invalidated.

  As the update process, the information processing apparatus 2300 uses the authentication main FAT 2342, the authentication sub FAT 2343, and the authentication open file information 2344 to update the file in the authentication area. By execution, the same process as the update process shown in the first embodiment is performed (see FIGS. 7, 8, 10, 12, and 17). Here, the authentication main FAT 2342 corresponds to the main FAT 341, the authentication sub FAT 2343 corresponds to the sub FAT 342, and the authentication open file information 2344 corresponds to the open file information 343. Further, when a file in the normal area is to be updated, the information processing apparatus 2300 uses the normal main FAT 2345 and the normal open file information 2346 to execute the normal file processing program 2333, which is described in the second embodiment. Processing similar to the update processing is performed (see FIGS. 21 to 23 and FIG. 27). Here, the normal main FAT 2345 corresponds to the main FAT 1341, and the normal open file information 2346 corresponds to the open file information 1343.

Hereinafter, the restoration process executed in the information processing apparatus 2300 will be described.
The restoration process is, for example, the main power supply after the power supply can be supplied next from the main power supply when the file update is not completed due to the main power shutoff etc. This process is executed after the battery is recharged and the user turns on the power.

FIG. 31 is a flowchart showing restoration processing by the information processing apparatus 2300.
When the information processing apparatus 2300 starts the restoration process, the information processing apparatus 2300 first reads the medium ID from the information recording medium 2370 via the control unit 2780 (step S3101), and the read medium ID and the update preparation made during the previous activation. The medium information 2341 stored in the RAM 2340 is compared with the processing, and it is determined whether or not they match (step S3102). If they do not coincide with each other, an information recording medium that is different from the information recording medium in which the file was updated last time is currently mounted, and thus the restoration process is terminated without particularly restoring the file.

  If it is determined in step S3102 that the two match, the information processing apparatus 2300 executes a part of the authentication file processing program 2332 and performs restoration processing for the authentication area (step S3103). The restoration process for the authentication area in step S3103 is the same as the restoration process (see FIG. 19) described in the first embodiment.

Subsequent to step S3103, the information processing apparatus 2300 executes a part of the normal file processing program 2333 to perform restoration processing for the normal area (step S3104). The restoration process for the normal area in step S3104 is the same process as the restoration process (see FIG. 28) shown in the second embodiment.
<Modification>
Hereinafter, modified examples of the restoration process in the information processing apparatus described in the first to fourth embodiments will be described.

FIG. 32 is a flowchart illustrating a restoration selection process that is a modification of the restoration process.
The restoration process shown in the first to fourth embodiments can be replaced with the restoration selection process of FIG.
The information processing apparatus according to this modification (hereinafter referred to as “modified information processing apparatus”) determines whether or not the processing status in all open file information in the RAM is 0 (steps S3201 to S3203). If both are 0, it means that the update process is not stopped halfway, and the restoration selection process is terminated.

  If there is at least one open file information whose processing status is other than 0, the modified information processing apparatus displays on the display that information for restoration exists (step S3204), and executes restoration or restoration information. A display for allowing the user to select whether to discard the information is performed, and the selection is accepted from the user (step S3205). The information for restoration includes the main FAT and open file information on the RAM, and the sub FAT if present.

  If the accepted selection is to restore (step S3206), the modified information processing apparatus executes the restoration process shown in each embodiment (step S3207) and ends the restoration selection process. If the received selection is to discard the restoration information, the modified information processing apparatus clears the restoration information with 0 (step S3208) and ends the restoration selection process.

As described above, according to the restoration selection process, the user can select whether or not restoration can be executed. Therefore, when the information recording medium is different between the update and the restoration, or the information recording medium is temporarily removed after the update. The user prevents the restoration process from being executed when it is rewritten by another information processing apparatus and attached to the original information processing apparatus again, that is, when the restoration process does not function effectively. Will be able to.
<Supplement>
The file updating apparatus according to the present invention has been described based on the embodiments. However, the present invention is not limited to these embodiments, of course. Hereinafter, modifications of the embodiment will be described.
(1) In the first embodiment, even after the file is updated, if the close instruction has not been acquired, the FAT or the like in the information recording medium indicates the position of the data constituting the updated file content in the restoration process. Although an example in which the directory entry is not updated is shown, the sub FAT information and the open file information in the RAM indicate the position of the data constituting the updated file contents even before the close instruction is acquired. If recorded, it is possible to update the FAT or directory entry so as to indicate the updated data position in the restoration process, and it is assumed that the progress status when stopping in the middle of the update was before obtaining the close instruction. In the restoration process, the user can select whether or not to update the file contents in the FAT, etc. Restoration may be performed in accordance with.
(2) The main power source 320 shown in the first embodiment or the like is not limited to a rechargeable battery, and acquires power from a wall outlet of a house and supplies the power to each unit in the information processing apparatus 300 and the information recording medium 360. It may be a mechanism. The auxiliary power supply 350 is not necessarily a primary battery as long as it can supply power independently of the main power supply 320.
(3) In the first embodiment and the like, a file update and restoration method in the case where the FAT file system is used as the file system has been described. However, the file system is not limited to this, and for example, the FAT32 file system is used. In this case, the same update and restoration method can be used. Further, the storage capacity of the information recording medium is not limited to 64 MB, and the size of one cluster is not limited to 16 KB. Further, although 0 indicates an unused cluster as the value of the FAT entry, a numerical value other than 0 may be used in this sense, and 0xFFF indicates a cluster at the end of the link. Numerical values other than 0xFFF may be used in this sense.
(4) In the first embodiment and the like, the restoration information, that is, the information necessary for restoring the file is held in the RAM to which the power is always supplied by the auxiliary power, but the power is not supplied to the main power supply. However, as long as the stored restoration information is not lost, the restoration information may be held in another type of recording medium, such as a nonvolatile memory.

The information recording medium may be a flash memory. In particular, if the information recording medium is a flash memory and the memory for storing restoration information can be accessed faster than the flash memory, it can be used only for restoration when updating the file in the flash memory. It is possible to shorten the time required for recording useful information.
(5) In the second embodiment, the case of overwriting and updating from the beginning of the file has been described (see FIG. 23). However, the same procedure is applied to overwriting and updating an arbitrary position in the file, or when adding data to the file. It is good also as processing with.

In the second embodiment, a case has been described in the file update process where a free area is acquired for writing new data and new data is written. However, once the file update process is started, old data is destroyed. When it does not matter, the old data may be directly overwritten without acquiring the free space.
(6) In the fourth embodiment, the medium ID is acquired from the information recording medium, and it is determined whether the recording medium loaded in the information processing apparatus is the same when updating and when restoring. However, it is not limited to the medium ID unique to each information recording medium, and the identity of the recording medium may be determined using a hash value of information stored at a specific position of the information recording medium.
(7) A computer program for causing a computer or the like to execute the processing procedure of the information processing apparatus shown in Embodiments 1 to 4 and the modification (the procedure shown in the flowchart of FIG. 7 and the like) is recorded on a recording medium. Alternatively, it can be distributed and distributed via various communication paths. Examples of such a recording medium include an IC card, an optical disk, a flexible disk, and a ROM. The computer program distributed and distributed is used by being installed in a computer or the like, and the computer or the like executes the computer program to perform update processing as shown in the first to fourth embodiments or the modified examples. , Restoration processing, restoration selection processing, and the like can be performed.

  The file update apparatus according to the present invention is an apparatus that enables appropriate restoration of a file when the update is stopped due to a power interruption or the like during the update of the file recorded on the recording medium, It can be used in various information processing apparatuses that handle files.

It is a figure which shows the data structure in the storage area in a certain FAT file system. It is a figure which shows the directory entry which is the management information of a file. It is a figure which shows FAT. It is a figure which shows the data which comprise file content. It is a block diagram of the information processing apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the example of the content of the information recording medium 360, and the example of the content of RAM340 after an update preparation process was made. 5 is a flowchart illustrating an overview of update processing by the information processing apparatus 300. 5 is a flowchart showing an open process by the information processing apparatus 300. It is a figure which illustrates the data state after an open process. 10 is a flowchart showing post-update data recording processing by the information processing apparatus 300. It is a figure which illustrates the data state after the data recording process after an update. 5 is a flowchart illustrating a closing process by the information processing apparatus 300. It is a figure which illustrates the data state after execution of step S903 in a close process. It is a figure which shows the mode of the update of main FAT in the condition where several files are made into update object and the update process is implemented in parallel. It is a figure which illustrates the data state after execution of step S905 in a close process. It is a figure which illustrates the data state after a close process is complete | finished. 5 is a flowchart showing management information recording processing by the information processing apparatus 300. It is a figure which illustrates the data state after execution of management information recording processing. 10 is a flowchart illustrating a restoration process by the information processing apparatus 300. It is a block diagram of the information processing apparatus which concerns on Embodiment 2 of this invention. 12 is a flowchart illustrating an overview of update processing by the information processing apparatus 1300. 12 is a flowchart illustrating an open process by the information processing apparatus 1300. 12 is a flowchart illustrating file update processing by the information processing apparatus 1300. It is a figure which illustrates the data state after execution of step S1703 in a file update process. It is a figure which illustrates the data state after execution of step S1707 in a file update process. It is a figure which illustrates the data state after a file update process is completed. 11 is a flowchart showing management information recording processing by the information processing apparatus 1300. 10 is a flowchart illustrating restoration processing by the information processing apparatus 1300. It is a flowchart which shows the decompression | restoration process by a composite information processing apparatus. It is a block diagram of the information processing apparatus which concerns on Embodiment 4 of this invention. 10 is a flowchart showing restoration processing by the information processing apparatus 2300. It is a flow chart which shows restoration selection processing which is a modification of restoration processing.

Explanation of symbols

300, 1300, 2300 Information processing device 310 CPU
320 Main power supply 330, 1330, 2330 Non-volatile memory 331, 1331 File processing program 340, 1340, 2340 RAM
341, 1341 Main FAT
342 Sub FAT
343, 1343 Open file information 344, 1344, 2361, 2364 Entry information 345, 1345, 2362, 2365 Processing status 346, 1346, 2363, 2366 Restoration information 350 Auxiliary power supply 360, 2370 Information recording medium 361 Partition table 362 Partition boot sector 363 364, 2373, 2377 FAT
365, 2374, 2378 Root directory entry 366, 2375, 2379 Data area 2331 Medium ID acquisition program 2332 Authentication file processing program 2333 Normal file processing program 2341 Medium information 2342 Authentication main FAT
2343 Authentication Sub FAT
2344 Authentication open file information 2345 Normal main FAT
2346 Normal open file information 2371 Medium ID
2372 Authentication area 2376 Normal area 2780 Control unit

Claims (12)

The first recording medium in which the position information indicating the storage position in the first recording medium of the data constituting the file contents for each of all the files in the first recording medium is removable. A file update device for updating a plurality of files through a plurality of update procedures,
A second recording medium;
Progress recording means for recording progress information indicating which update procedure has been performed in the second recording medium for each file to be updated ;
A new data recording means for recording data constituting the updated file content in the first recording medium for each of a plurality of files to be updated separately from the data constituting the file content before the update,
Update information recording means for recording, in the second recording medium, update information indicating the storage position in the first recording medium of the data constituting the file contents for each of the updated files recorded by the new data recording means. ,
Corresponding to each of the updated files , after the update information is recorded by the update information recording means on the data constituting the updated file contents, in the first recording medium for the data based on the update information Position information updating means for updating the position information in the first recording medium indicating the storage position of the data constituting the content before the update of the file ,
A plurality of files in the first recording medium can be executed after the update is stopped because the update cannot be executed in the middle of the update performed through a plurality of update procedures. In this case, for each of a plurality of files, it is determined based on the progress information whether update information is recorded for the data constituting the updated file contents, and if the determination result is affirmative, the update is performed. A file update apparatus comprising: re-update means for updating position information in the first recording medium so as to indicate a storage position in the first recording medium for the data based on the information . The file update device further includes:
Medium identification information recording means for reading the unique medium identification information from the first recording medium and holding it in the apparatus before updating the file in the first recording medium;
When the medium identification information of the recording medium loaded in the apparatus is read and the read medium identification information and the held medium identification information are collated and they do not match, the re-update means file update apparatus according to claim 1, characterized in that it comprises a re-update suppressing unit for suppressing the update of the location information. The file update apparatus further includes a close instruction acquisition unit that acquires a close instruction for a file in which data is recorded by the new data recording unit,
The progress information recorded by the progress recording means is information that can also be identified whether or not it is after a close instruction is acquired for a file,
The position information update means is the file only after the update information is recorded for the data constituting the updated file contents and after the close instruction for the file is acquired by the close instruction acquisition means. Updating the position information in the first recording medium based on the update information according to
The re-updating unit executes the update after the update is stopped due to a state in which the update cannot be performed in the middle of the update performed for the plurality of files in the first recording medium through the plurality of update procedures. After the update information corresponding to the updated file is recorded and the close instruction is acquired for each of a plurality of files based on the corresponding progress information only when it determined that, based on the update data relating to the file, the file update apparatus of claim 1, wherein updating the location information in the first recording medium. In the first recording medium,
Each cluster in the first recording medium indicates whether or not data constituting any file content is stored in the cluster, and there is a connection between clusters in which data constituting the same file content is stored. FAT information indicating that there is,
For each file in the first recording medium, directory information indicating a cluster in which the head of data constituting the file content is stored is recorded,
The location information in the first recording medium includes the FAT information excluding unused cluster information which is a portion indicating a cluster in which no data constituting the file content is stored, and the directory information. Configured,
The update information for each file recorded by the update information recording means is between clusters in the first recording medium in which the data constituting the contents of the updated file recorded by the new data recording means is stored. Consists of continuous relationship information indicating that there is a connection, and entry information indicating a cluster in which the head of the data constituting the content of the updated file is stored,
The location information update means, for each file where the update information is recorded by the update information recording means,
Based on the continuity information relating to the data constituting the contents of the file, it indicates that there is a connection between the clusters in which the data constituting the updated file contents recorded by the new data recording means are stored. Updated FAT information, and
Based on the entry information related to the file, the directory information about the file is updated so as to indicate the cluster where the head of the data constituting the updated file content is stored,
The re-update means updates the location information by updating the FAT information based on the continuous relationship information in the update information, and updating the directory information based on the entry information in the update information. The file update apparatus according to claim 1 . The file update device further includes:
After recording the update information about the data constituting the updated file content by the update information recording means, the cluster in the first recording medium in which the data constituting the content before the update of the file is stored Comprising unused area releasing means for recording unused information indicating that data constituting the file contents is not stored in the second recording medium,
The location information updating unit performs updating of the FAT information so that the unused information recorded by the unused area releasing unit is reflected in the unused cluster information.
The file updating apparatus according to claim 4 , wherein the re-update means updates the FAT information so that the unused information is reflected in the unused cluster information. The file update device further includes:
FAT copying means for copying FAT information in the first recording medium as work FAT information to a work FAT area which is an area in the second recording medium before updating all files;
A close instruction obtaining means for obtaining a close instruction for a file whose data has been recorded by the new data recording means,
The progress information recorded by the progress recording means is information that can also be identified whether or not it is after a close instruction is acquired for a file,
The new data recording means records the data constituting the updated file based on the unused information or all the continuous relationship information and the work FAT information, and the data constituting the other updated file contents. Recorded in a cluster other than the
In the first recording medium in which the update information recording means further reflects the continuous relationship information about the acquired file related to the close instruction in the work FAT information, and the data constituting the contents before the update of the file is stored. In this cluster, unused information indicating that data constituting any file content is not stored is also reflected in the work FAT information.
The position information update means updates the FAT information based on the work FAT information,
The re-updating unit executes the update after the update is stopped due to a state in which the update cannot be performed in the middle of the update performed for the plurality of files in the first recording medium through the plurality of update procedures. (A) For each of a plurality of files , if it can be determined that the close instruction for the file has been acquired based on the corresponding progress information, the continuous The related information and unused information are reflected in the work FAT information, (b) the FAT information is updated based on the work FAT information, and (c) the corresponding progress information indicates that the close instruction for the file has been acquired. 6. The file updating apparatus according to claim 5, wherein the directory information is updated based on the entry information for all the indicated files. The file update device further includes:
At the time of re-updating, when data constituting the updated file content is recorded on the first recording medium, an instruction indicating that the location information should be updated to indicate the storage location of the data is acquired. An update reflection instruction acquisition means is provided,
The re-updating unit executes the update after the update is stopped due to a state in which the update cannot be performed in the middle of the update performed for the plurality of files in the first recording medium through the plurality of update procedures. If the instruction is acquired by the update reflection instruction acquisition unit, before each update of the FAT information based on the work FAT information, a plurality of files are handled. Even when it can be determined that the update information corresponding to the data constituting the updated file contents is recorded based on the progress information to be updated, the continuous relationship information and the unused information related to the file are stored in the work FAT. The file update apparatus according to claim 6 , wherein the file update apparatus is reflected in the information. The first recording medium is composed of an authentication area that is independent of each other and provided with a predetermined access restriction, and a normal area that is not provided with the access restriction.
The position information in the first recording medium includes first position information indicating a storage position of data constituting each file content in the authentication area in the authentication area, and data constituting each file content in the normal area. Second position information indicating the storage position in the normal area,
The progress information recorded by the progress recording means includes first progress information indicating which update procedure the file in the authentication area has been updated and up to which update procedure the file in the normal area has been updated. Second progress information indicating whether or not,
The new data recording means records the data constituting the updated file contents in the authentication area separately from the data constituting the file contents before the updating in the authentication area, and the files in the normal area. In addition to the data that constitutes the file contents before the update, the data that constitutes the file contents after the update is recorded in the normal area,
The update information recorded by the update information recording means is first update information indicating the storage position in the authentication area of the data constituting the updated file content recorded in the authentication area by the new data recording means. And second update information indicating the storage position in the normal area for the data constituting the updated file content recorded in the normal area by the new data recording means,
The location information update means
After the first update information is recorded by the update information recording means for the data constituting the updated file content, the storage location of the data in the authentication area is indicated by referring to the first update information. In addition, the first location information indicating the storage location of the data constituting the content before the update of the file is updated, and the second update information is recorded by the update information recording means for the data constituting the file content after the update. After that, the second update information is referred to, so that the storage position of the data constituting the content before the update of the file is indicated so as to indicate the storage position of the data in the normal area. The file update apparatus according to claim 1, wherein the position information is updated. The first recording medium is a flash memory;
The file update apparatus according to claim 1, wherein the second recording medium is a memory that can be accessed at a higher speed than the first recording medium. The file update apparatus according to claim 9, wherein the second recording medium is a RAM, and power is supplied from a power source independent of a power source of the first recording medium. A plurality of files in the first recording medium that is recorded with position information indicating a first storage location in the recording medium of data constituting the file content for each all the files in the first recording medium through a plurality of update procedure updates File update method to
A progress recording step of recording progress information indicating which update procedure has been performed in the second recording medium for each file to be updated ;
A new data recording step for recording, in the first recording medium, data constituting the updated file content for each of a plurality of files to be updated separately from the data constituting the file content before the update,
An update information recording step for recording, in the second recording medium, update information indicating the storage position in the first recording medium of the data constituting the file content for each of the updated files recorded in the new data recording step; ,
Corresponding to each of the updated files , after the update information is recorded by the update information recording step for the data constituting the updated file contents, the data is recorded in the first recording medium based on the update information. A position information update step for updating the position information in the first recording medium indicating the storage position of the data constituting the content before the update of the file, so as to indicate the storage position of the file ,
A plurality of files in the first recording medium can be executed after the update is stopped because the update cannot be executed in the middle of the update performed through a plurality of update procedures. In this case, for each of a plurality of files, it is determined based on the progress information whether update information is recorded for the data constituting the updated file contents, and if the determination result is affirmative, the update is performed. And a re-updating step of updating the position information in the first recording medium so as to indicate the storage position in the first recording medium of the data based on the information . Multiple files in the first recording medium that is recorded with position information indicating the storage position in the first recording medium of data constituting the file content for each all the files in the first recording medium, through a plurality of update procedure A program for causing a device including a CPU to execute a file update process to be updated,
The file update process
A progress recording step of recording progress information indicating which update procedure has been performed in a second recording medium built in the device for each file to be updated ;
A new data recording step for recording, in the first recording medium, data constituting the updated file content for each of a plurality of files to be updated separately from the data constituting the file content before the update,
An update information recording step for recording, in the second recording medium, update information indicating the storage position in the first recording medium of the data constituting the file content for each of the updated files recorded in the new data recording step; ,
Corresponding to each of the updated files , after the update information is recorded by the update information recording step for the data constituting the updated file contents, the data is recorded in the first recording medium based on the update information. A position information update step for updating the position information in the first recording medium indicating the storage position of the data constituting the content before the update of the file, so as to indicate the storage position of the file ,
A plurality of files in the first recording medium can be executed after the update is stopped because the update cannot be executed in the middle of the update performed through a plurality of update procedures. In this case, for each of a plurality of files, it is determined based on the progress information whether update information is recorded for the data constituting the updated file contents, and if the determination result is affirmative, the update is performed. And a re-updating step of updating the position information in the first recording medium so as to indicate the storage position in the first recording medium of the data based on the information .

Images