JP2013097680A - Information processor and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information processor for improving the convenience of backup.SOLUTION: The information processor stores data to be backed up, and when power disconnecting operation is detected, and predetermined overwrite backup inhibition conditions are satisfied, generates new backup data including the whole stored data separately from the backup data generated in the previous backup time, and otherwise, generates new backup data by overwriting the backup data generated in the previous backup time.

Description

  The present invention relates to an information processing apparatus and program for backing up data.

  In recent years, many information devices have been used even in homes. The data stored in such information equipment includes valuable data in each household, and there is a demand for measures for loss such as backup. For example, as a conventional general technique for performing backup when the power is cut off, there is one disclosed in Patent Document 1.

JP-A-5-143248

  However, in the data backup, it is only necessary to create a backup of the entire storage area to be backed up every time, but this results in an excessive amount of backup data. On the other hand, if you always want to back up the latest state of the storage area to be backed up, for example, if you accidentally formatted the storage area, if a backup is created in this state, This can result in data loss. Thus, the conventional general backup method cannot sufficiently improve the convenience.

  The present invention has been made in view of the above-described problems of the conventional example, and an object thereof is to provide an information processing apparatus and program that can improve the convenience of backup.

The present invention for solving the problems of the above-described conventional example is an information processing apparatus, a holding unit that holds data to be backed up, a unit that determines whether it is a backup timing, and a backup timing If it is determined that the backup backup prohibition condition is satisfied, the backup target data held in the holding means is copied separately from the backup data generated at the previous backup. New backup data is generated, and if not, backup creation means for generating new backup data by overwriting the backup data generated at the previous backup is included.
Also, here, overwrite backup prohibition conditions are that after performing the previous backup, formatting, detecting an abnormality in the holding means, backup to a new backup destination, restoring after performing the previous backup It may include at least one of the work.
Further, the means for determining whether or not it is time to back up may determine that it is time to back up when the power is turned off.

  The program according to one aspect of the present invention is determined to be a timing for backing up a computer connected to a holding unit that holds data to be backed up, and a timing to back up the computer. When satisfying a predetermined overwrite backup prohibition condition, separately from the backup data generated at the time of the previous backup, copy the backup target data held in the holding means and copy the new backup data. Otherwise, it is made to function as backup creation means for creating new backup data by overwriting the backup data generated at the previous backup.

  According to the present invention, the convenience of backup can be improved.

It is a block diagram showing an example of an information processing apparatus according to an embodiment of the present invention. It is a functional block diagram showing the example of the information processing apparatus which concerns on embodiment of this invention. It is explanatory drawing showing the example of the content of the database which the information processing apparatus which concerns on embodiment of this invention produces | generates. It is a flowchart figure showing the example of the backup process by the information processing apparatus which concerns on embodiment of this invention. It is explanatory drawing which represents generally the content of the backup destination hard disk etc. which were connected to the information processing apparatus which concerns on embodiment of this invention. It is a flowchart figure showing the example of the restoration process by the information processor concerning an embodiment of the invention.

  The information processing apparatus 1 according to the embodiment of the present invention includes a control unit 11, a storage unit 12, a storage unit 13, an operation unit 14, a display unit 15, and an interface unit 16, as illustrated in FIG. Is done. In addition to the above, the information processing apparatus 1 according to the present embodiment may include a network interface or the like.

  Here, the control unit 11 is a program control device such as a CPU, and operates according to a program stored in the storage unit 12. In the present embodiment, the control unit 11 is configured to determine whether it is time to back up, and when it is determined that it is time to back up, when a predetermined overwrite backup prohibition condition is satisfied. In addition to the backup data generated during the previous backup, new backup data including the entire data stored in the storage unit 13 is generated. If not, the backup data generated during the previous backup is overwritten. It functions as a backup creation means for generating new backup data. Detailed operation of the control unit 11 will be described later.

  The storage unit 12 is a memory device or the like and holds a program executed by the control unit 11. This program is provided by being stored in a computer-readable recording medium such as a DVD-ROM, and is copied and stored in the storage unit 12. Alternatively, the program may be received via communication means such as a network and stored in the storage unit 12. The storage unit 12 also operates as a work memory for the control unit 11. Note that the storage unit 12 may include a nonvolatile memory. This non-volatile memory retains data to be retained even if the power is cut off (for example, parameter data required at startup).

  The storage unit 13 is, for example, a hard disk or an SSD (Solid State Drive), and operates as a holding unit that holds data to be backed up. As an example, the backup target data is image data including a still image and a moving image. The storage unit 13 is formatted at least at the start of use, and a predetermined file system is formed. Each data stored in the storage unit 13 is managed in this file system.

  The operation unit 14 may be a switch provided in the housing of the information processing apparatus 1 or may include a remote controller using infrared rays or the like. Moreover, a keyboard, a mouse | mouth, etc. may be sufficient. The operation unit 14 accepts a user's instruction operation and outputs the content of the instruction operation to the control unit 11.

  The display unit 15 is an output port to a home television or display device, and outputs screen information to the television or display device in accordance with an instruction input from the control unit 11.

  The interface unit 16 includes a serial interface such as a USB (Universal Serial Bus), a memory card reader, and the like. The interface unit 16 is connected to a disk drive or the like serving as a backup destination. The interface unit 16 may accept a memory card. In this case, the interface unit 16 sends a signal indicating that the memory card has been inserted to the control unit 11. The interface unit 16 reads out data from the memory card and outputs the data to the control unit 11 in accordance with an instruction input from the control unit 11.

  Next, the operation of the control unit 11 will be described. The control unit 11 according to the present embodiment executes data reception processing, display processing, backup processing, and restoration processing. Here, the data receiving process is as follows, for example. When the control unit 11 accepts a signal indicating that a memory card has been inserted into the memory card reader of the interface unit 16, the control unit 11 instructs the interface unit 16 to read data stored in the inserted memory card. To do. In response to this instruction, the control unit 11 accepts data output from the interface unit 16 and accumulates and stores the data in the storage unit 13. In one aspect of the present invention, the interface unit 16 may have a network interface, and the control unit 11 may receive data via the network interface and accumulate and store the data in the storage unit 13.

  Specifically, the data here may be image data such as photographs. Further, when the same data as the data already stored in the storage unit 13 is input from the interface unit 16, the control unit 11 may discard the data without storing it. Here, whether the data already stored and the input data are the same may be determined by comparing, for example, the file name, its hash value, or the data size, and the hash of each data It may be performed by comparing values. By this processing, the storage unit 13 is in a state where data is stored. Note that this process is an example. For example, the control unit 11 executes a process of creating a document by accepting a keyboard or mouse operation from a user, and stores the data of the created document in the storage unit 13. May be.

  The display process of the control unit 11 is as follows. That is, when the control unit 11 receives a specification of data stored in the storage unit 13 and an instruction to display the specified data from the user, the control unit 11 stores the data stored in the storage unit 13 according to the instruction. Among them, the designated data is read out, and an image related to the data is generated and output via the display unit 15.

  Next, backup processing of the control unit 11 will be described. As illustrated in FIG. 2, the control unit 11 that executes the backup process functionally includes a backup necessity determination unit 21, a backup condition determination unit 22, an overwrite backup generation unit 23, and a new backup generation unit. 24.

  The backup necessity determination unit 21 first determines whether it is time to perform backup. Here, determination as to whether or not it is time to perform backup is performed as follows, for example. That is, the backup necessity determination unit 21 may determine that the backup should be performed when the information processing apparatus 1 according to the present embodiment is about to be turned off (power is cut off). Further, the backup necessity determination unit 21 may determine that it is time to perform backup when the user instructs backup. If the backup necessity determination unit 21 determines that it is time to perform the backup, it checks whether or not the backup target data in the storage unit 13 has changed since the previous generation of backup data. In this case, it is determined that backup is necessary, and when there is no change, it is determined that backup is unnecessary.

  Whether or not the data to be backed up in the storage unit 13 has changed since the previous generation of backup data has been recorded is information on the date and time of the last write to the storage unit 13 and information on the date and time when the previous backup data was generated. There are various methods such as comparing these, and any method may be adopted.

  The backup necessity determination unit 21 further determines whether a backup destination device (hard disk, SSD, or the like) is connected to the interface unit 16. Even if there is a change in the data to be backed up, it may be determined that the backup is unnecessary.

  The backup condition determination unit 22 determines whether to perform overwrite backup or new backup by determining whether a predetermined overwrite backup prohibition condition is satisfied. This overwriting backup prohibition condition is, for example, that the storage unit 13 has been formatted after the previous generation of backup data, that an abnormality has been detected in the storage unit 13 that is a holding means, or that a backup to a new backup destination is performed. That is, after the previous generation of backup data, restoration work from backup was performed.

  When the backup condition determination unit 22 determines that any of these conditions is satisfied, the backup condition determination unit 22 instructs the new backup generation unit 24 to generate backup data. When it is determined that none of these conditions is satisfied, the overwrite backup generation unit 23 is instructed to generate backup data. The overwrite backup generation unit 23 or the new backup generation unit 24 according to the present embodiment creates a directory with the identification information unique to the information processing apparatus 1 as a name on the backup destination hard disk or the like, and backs up the directory in the directory. Copy the target data. The directory where this data is copied corresponds to the backup data. Therefore, the backup condition determination unit 22 determines that the backup destination connected to the interface unit 16 is a new backup destination if there is no directory whose name is identification information unique to the information processing apparatus 1. It is assumed that this unique identification information does not change over time. For example, when the information processing apparatus 1 includes a network interface, the MAC address of the network interface can be used.

  The overwrite backup generation unit 23 copies the data to be backed up stored in the storage unit 13 to a directory whose name is identification information unique to the information processing apparatus 1 at the backup destination connected to the interface unit 16. . At this time, if there is data having the same content, the data at the backup destination currently connected to the interface unit 16 may not be overwritten without copying. In addition, if there is data stored in the backup destination connected to the interface unit 16 and not stored in the storage unit 13, the overwrite backup generation unit 23 deletes the data from the backup destination. Also good.

  The new backup generation unit 24 checks whether there is a directory whose name is identification information unique to the information processing apparatus 1 at the backup destination connected to the interface unit 16. If there is such a directory, the name of the directory To change. Then, the new backup generation unit 24 newly creates a directory with the identification information unique to the information processing apparatus 1 as the name of the backup destination, and becomes a backup target stored in the storage unit 13 in the directory. Duplicate data.

  Further, the control unit 11 according to the present embodiment performs the following process as a restoration process for restoring the contents of the storage unit 13 from the backed up data. In the restoration process, the control unit 11 acquires a list of directory names stored in the backup destination connected to the interface unit 16 and displays the list on the display or the like via the display unit 15. When the control unit 11 accepts a user's operation for selecting one restoration source from the list, the control unit 11 deletes the data currently stored in the storage unit 13 and sets the directory name of the selected restoration source. The corresponding data stored in the backup destination directory is read and copied to the storage unit 13.

  In the above description, if the data is image data, the control unit 11 generates a thumbnail image (reduced image) when the data is received, and stores the thumbnail image in the storage unit 13 in association with the original image data. May be. Further, the storage unit 13 includes, for each backup target data, a file name of the data and information related to the data (for example, a file name of thumbnail image data is included as information for specifying thumbnail image data). A database including an entry (E) that associates with each other may be stored (FIG. 3).

  The information processing apparatus 1 according to the present embodiment has the above-described configuration and operates as exemplified below. In the description of the operation example here, it is assumed that the data is image data. For example, this data may be data in Exif (Exchangeable image file format) format including a JPEG (Joint Picture Experts Group) format image data main body and a metadata portion, which is captured by a digital camera or the like. . Further, this data may be moving image data. Here, it is assumed that the data includes additional information such as shooting date information and latitude / longitude elevation information (so-called geotag) indicating the shooting location. The additional information may include information added by the user operating the information processing apparatus 1 according to the present embodiment (for example, information indicating “favorite”).

  When the control unit 11 receives a data capture instruction from the user after the power is turned on, the control unit 11 reads the image data stored in the memory card from the memory card inserted in the memory card reader included in the interface unit 16. If the file name of the read image data is not included in the file name of the image data already stored in the storage unit 13, the image data is copied and stored in the storage unit 13.

  Further, the control unit 11 generates thumbnail image data for the copied image data, stores the thumbnail image data in the storage unit 13, and stores the file name of the image data in association with the file name of the thumbnail image data in the database. .

  The control unit 11 also receives an instruction to display image data from the user. For example, the user may specify additional information and selectively display an image of image data including the specified additional information. For example, when the user performs an operation of inputting information on a shooting date, which is an example of additional information, and displaying image data shot on a specific shooting date, the control unit 11 stores the data in the storage unit 13. Among the image data, the image data including information on the shooting date specified by the input information as the additional information is selectively read out. Then, the control unit 11 outputs the image of the read image data to the display unit 15 for display. If there are a plurality of read image data, the control unit 11 may generate an image of a list of the image data and display the image of the list. When the user performs an operation of selecting one of the image data from the list, the control unit 11 performs a process of displaying an image of the selected image data.

  Further, when the control unit 11 accepts an instruction to add “favorite” additional information to the displayed image data, the control unit 11 adds “favorite” to the displayed image data. Include information.

  When the control unit 11 receives designation of image data and an instruction to delete the designated image data from the user, for example, the control unit 11 deletes the designated image data from the storage unit 13 and from the database. The entry including the file name of the image data is deleted.

In an example of the present embodiment, backup processing is started when the information processing apparatus 1 is powered off. In other words, the power may be turned off for some reason, such as when the user has performed an operation to turn off the power, or when it is detected by a timer (not shown) that a certain time has elapsed since the user stopped operating. The backup process starts at the timing.
That is, the control unit 11 detects that the power is about to be turned off and starts the backup process (FIG. 4). In the following example, when an abnormality occurs during the backup process, information called a backup flag is held in the storage unit 13 so that the fact can be detected later. This information can be, for example, an empty file with a predetermined file name. Here, it is assumed that a hard disk serving as a backup destination is connected to the interface unit 16.

  When starting the backup process, the control unit 11 first determines whether or not the database has been updated since the previous backup data was generated (S1). Specifically, every time the backup data is generated, the control unit 11 creates a hash value of the database and stores it in the backup destination. The control unit 11 calculates the hash value of the database at the time of execution of this process in process S1 and, if there is a hash value stored in the backup destination, calculates the hash value stored in the backup destination. Compare the hash value. If they are different, it is determined that the database has been updated since the last time backup data was generated.

  If it is determined that the database has been updated since the control unit 11 generated the previous backup data in the process S1 (Yes), the control unit 11 determines whether to perform an overwrite backup or a new backup ( S2). Specifically, here, when the storage unit 13 is formatted after the previous generation of backup data, when the storage unit 13 that is a holding unit detects an abnormality, the control unit 11 creates a new backup destination. In the case of the backup to the backup data, it is determined that the new backup should be performed when any of the cases where the restoration work from the backup data is performed after the previous generation of the backup data.

  That is, the control unit 11 determines whether formatting has been performed after the previous generation of backup data. This determination is made as follows, for example. The control unit 11 performs the formatting of the storage unit 13 according to an instruction. After the formatting, the control unit 11 holds information indicating that the formatting is performed in the storage unit 13 or the storage unit 12. When this information is held in the storage unit 13 or the storage unit 12, the control unit 11 determines that formatting has been performed since the previous power-on. Moreover, the control part 11 deletes the information showing that it performed the format after this determination is complete | finished.

  In addition, the control unit 11 inspects the storage unit 13 that is a holding unit at predetermined timings. There are various methods for this check for each file system. For example, if the file system is an operating system standard compatible with UNIX (registered trademark), the check is performed by the same process as the command such as fsck (file system check) It can be performed. When an abnormality is detected in this inspection, the control unit 11 determines that an abnormality has been detected in the storage unit 13.

  Further, the control unit 11 determines whether or not the restoration work from the backup data (whether the backup data was generated last time or other backup data) has been performed after the previous backup data was generated. Judge as follows. When performing the restoration process, the control unit 11 holds information indicating that the restoration process has been performed in the storage unit 13 or the storage unit 12. Then, when this information is held in the storage unit 13 or the storage unit 12, the control unit 11 determines that restoration from the backup data has been performed after the previous generation of backup data. Further, after this determination is completed, the control unit 11 deletes information indicating that the restoration process has been performed.

  Since an example of determining whether or not the backup is to a new backup destination has already been described, repeated description will be omitted.

  When the control unit 11 determines in step S2 that a new backup should be performed ("new" in FIG. 4), the control unit 11 executes a new backup process (S3). That is, the control unit 11 determines whether or not there is a directory whose name is identification information unique to the information processing device 1 (the MAC address of the network interface of the information processing device 1) at the backup destination connected to the interface unit 16. If there is such a directory, change the name of the directory to a different one. Then, the control unit 11 newly creates a directory whose name is identification information unique to the information processing apparatus 1 at the backup destination.

  The control unit 11 sets a backup flag (S4). Here, a file as a backup flag is generated. Then, the control unit 11 stores a database stored in the storage unit 13 in a directory (hereinafter, referred to as a backup destination directory) that is created at the backup destination and has identification information unique to the information processing apparatus 1 as a name. Copy (S5). At this time, if the database is already stored in the backup destination, the database is overwritten. If it is not determined in process S2 that a new backup should be performed ("Overwrite" in FIG. 4), the process proceeds to process S4 and the process is continued.

  After copying the database, the control unit 11 then starts image data copy processing. In the following description, a case where processing is performed in consideration of the capacity of the backup destination will be described as an example.

  The control unit 11 refers to the database, reads one of the file names stored in the database that has not yet been read, and stores the image data corresponding to the file name read from the database in the storage unit 13 is read (S6). Then, the control unit 11 performs a process of copying the target image data using the read image data as the target image data (S7). In this copying process, the control unit 11 checks whether data having the same content as the target image data is already stored in the backup destination directory. Then, the control unit 11 does not copy the target image data when data having the same content as the target image data is already stored in the backup destination directory. Further, if data having the same content as the target image data is not already stored in the backup destination directory, the control unit 11 copies the target image data in the backup destination directory.

  The control unit 11 checks whether or not the image data relating to all the file names held in the database has been subjected to copy processing (S8). If all the image data has not been copied, that is, if there is image data that has not yet been copied (if No), the process proceeds to A and the backup destination hard disk It is checked whether or not the free space such as is below a predetermined threshold value (S9). If the free space falls below a predetermined threshold (if Yes), all the thumbnail image data currently stored is deleted from the backup destination directory (S10), and becomes the backup destination again. It is checked whether the free space of the hard disk or the like is below a predetermined threshold value (S11). Again, if the free space falls below a predetermined threshold (if yes), an error may be notified and the backup flag file may be deleted and the process terminated. Note that the threshold value in these processes is determined as a value corresponding to a capacity that can store, for example, predetermined n average size image data.

  In step S11, if the free space falls below a predetermined threshold value (if Yes), image data to be backed up is further selected based on the additional information, and image data other than the selected image data is selected as the backup destination. It may be deleted from the directory. For example, when the control unit 11 determines in step S11 that the free space is below a predetermined threshold, image data to which additional information indicating “favorite” is added as illustrated in FIG. Image data other than are deleted from the backup destination directory (S12). Further, it is checked whether or not the free capacity of the hard disk or the like serving as the backup destination is below a predetermined threshold value (S13). If the free capacity is below the predetermined threshold value (if Yes), An error may be notified (S14), the backup flag may be deleted (S15), and the process may be terminated. In this example, erasing the backup flag corresponds to processing for deleting the backup flag file.

  If the free space does not fall below the predetermined threshold value in the processes S9, S11, and S13 (if No), the control unit 11 returns to the process S6 and continues the process. If the control unit 11 determines in the process S8 that the above process has been performed for all the file names stored in the database (Yes in the process S8), the control unit 11 performs a process of deleting the thumbnail image in the current backup process. It is checked whether or not it has been carried out (S16). If the process of deleting the thumbnail image is performed (if Yes), the control unit 11 proceeds to the process S15 and ends the process.

  On the other hand, in the process S16, if the process of deleting the thumbnail image is not performed (if Yes), the control unit 11 refers to the database, reads the file name of the thumbnail image included in each entry of the database, and The thumbnail image of the name is copied from the storage unit 13 to the backup destination directory (S17). And the control part 11 transfers to process S15, and complete | finishes a process.

  Further, when the control unit 11 determines that the database has not been updated in the processing S1 of FIG. 4 (No), the control unit 11 checks whether a backup flag is set (S18). In this example, it is checked whether there is a backup flag file. If there is a backup flag file (if Yes), the control unit 11 proceeds to the process S2 and continues the process. If there is no backup flag file (if No), the control unit 11 terminates the process.

  According to the information processing apparatus 1 of the present embodiment as described above, for example, assuming that the user has accidentally formatted the storage unit 13, the following operation is performed. That is, as illustrated in FIG. 5, the information processing apparatus 1 starts backup processing when a power-off operation is performed after formatting. In this backup processing, the previous backup data is changed to an alias. (A name is changed from “aaaa” to “aaaa-bak1” in the figure) and is maintained as it is (A), and new backup data (B) is generated. This new backup data is assigned the name (A) (“aaaa” here) before the change. FIG. 5 is an explanatory diagram generally showing the contents of a backup destination hard disk or the like. At this time, the new backup data (B) reflects the contents of the storage unit 13 after the formatting, but the data before being deleted by the formatting is maintained as the data of the previous backup (A ). Therefore, the user can restore the original data from the previous backup data even if it is formatted by mistake.

  Also, assuming that the storage unit 13 is abnormal and the internal data is damaged, in this case, the information processing apparatus 1 according to the present embodiment changes the previous backup data to an alias and maintains it as is. You will create a backup. Therefore, even if the data is damaged, the user can restore the original data from the previous backup data.

  Also, by using the backup flag information, if the power is forcibly cut off during the backup process (such as when the outlet is pulled out), or if the interface unit 16 and the hard disk that is the backup destination are backed up during the backup process When the connection is cut off, the backup flag remains without being deleted, and it is possible to check whether or not the processing is normally completed at the time of the previous backup. If the previous backup process is not completed normally, the backup process is performed even if the database has not been updated. Thereby, the backup process can be made more reliable.

  Further, the information processing apparatus 1 according to the present embodiment operates as illustrated in FIG. 6 in response to an instruction from the user to perform the restoration process. That is, the information processing apparatus 1 displays a list of backup destination directories stored in a backup destination hard disk or the like connected to the interface unit 16 (S21). In the example shown in FIG. 5, directories (A) and (B) are displayed as a list.

  When the user performs an operation of selecting any one of the directories, the information processing apparatus 1 accepts the operation, sets the selected directory as a restoration source directory (recovery target backup data) (S22), and restores the source. The database and data are copied from the directory to the storage unit 13 (S23). In this process S23, if the thumbnail image data is in the restoration source directory, the information processing apparatus 1 may copy the thumbnail image data from the restoration source directory to the storage unit 13.

  Then, the information processing apparatus 1 newly generates thumbnail image data for the image data copied to the storage unit 13 (S24). For image data for which thumbnail image data has already been generated, a new thumbnail image need not be recreated for the image data. Here, the file name of the thumbnail image data is obtained by adding, for example, a character string “S” to the file name of the image data that is the source of the thumbnail image. In this way, thumbnail images corresponding to certain image data always have the same file name. Therefore, in the process S24, if a thumbnail image having the same file name as that of the generated thumbnail image is already stored in the storage unit 13, the information processing apparatus 1 controls not to generate the thumbnail image.

  In this way, when the user selects the restoration source directory, for example, a list of backup data generated by another information processing apparatus 1 is also presented in the list in this processing S21, and another information processing is performed. It is also possible to restore from backup data generated by the apparatus 1.

  As for the database stored in the storage unit 13, the control unit 11 obtains information indicating the date and time of update from a calendar IC (not shown) or the like and holds it in association with the database every time the database is updated. Also good. And the control part 11 may be made to display-output the information showing the update date of this database according to a user's request | requirement.

  In the above description, the thumbnail image data is assumed to be one type. However, a plurality of thumbnail image data having different sizes, or a part of the image data by a predetermined method instead of reduction. A plurality of types of thumbnail image data may be generated for one piece of image data, such as thumbnail image data created by clipping. In this case, in the process S10, the process of deleting the plurality of types of thumbnail images in ascending order of creation processing load and checking the free space may be repeated. Then, at the time when some types of thumbnail images are deleted, if the free space does not fall below the threshold value, the process may return to step S6 and continue the process.

  In the above description, the backup destination is a directory. However, the backup destination is not limited to this. For example, the backup destination may be an archive compressed by zip or the like. In this case, the archive becomes backup data.

  Further, here, the backup destination is assumed to be a hard disk or the like connected to the interface unit 16. However, when the interface 16 includes a network interface, for example, a network specified by a URL (Uniform Resource Locator) as the backup destination. The above server or the like may be used.

  DESCRIPTION OF SYMBOLS 1 Information processing apparatus, 11 Control part, 12 Storage part, 13 Storage part, 14 Operation part, 15 Display part, 16 Interface part, 21 Backup necessity judgment part, 22 Backup condition judgment part, 23 Overwrite backup generation part, 24 New Backup generation unit.

Claims (4)

Holding means for holding the data to be backed up;
Means for determining whether it is time to back up;
When it is determined that it is time to back up, if the predetermined overwrite backup prohibition condition is satisfied, the backup target data held in the holding means is separate from the backup data generated during the previous backup. To create new backup data by copying the backup data, if not, overwriting the backup data generated during the previous backup and creating new backup data,
An information processing apparatus including: The information processing apparatus according to claim 1,
The overwrite backup prohibition condition is
That the file was formatted after the last backup,
Detecting an abnormality in the holding means,
The backup is to a new backup destination,
The restoration work was performed after the last backup,
An information processing apparatus including at least one of them. The information processing apparatus according to claim 1, wherein
The information processing apparatus, wherein the means for determining whether or not it is time to back up determines that it is time to back up when the power is turned off. A computer connected to the holding means that holds the data to be backed up,
Means for determining whether it is time to back up;
When it is determined that it is time to back up, if the predetermined overwrite backup prohibition condition is satisfied, the backup target data held in the holding means is separate from the backup data generated during the previous backup. To create new backup data by copying the backup data, if not, overwriting the backup data generated during the previous backup and creating new backup data,
Program to function as.

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