JP2000099375A - File management device, file managing method for the same and storage medium with its control program recorded therein - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a file management device capable of dividing a file and storing it in a storage medium when another file is stored in the storage medium in which the file is about to be stored and even when the kind or format of it is different. SOLUTION: A control function 7 checks the capacity of an external storage device 13 and notifies the capacity to a dividing function 4. The function 4 divides data from the front of a file stored in a RAM 3 in conformity with the free capacity of the external storage device 4 and a flag attaching function 8 attaches a start flag to the front of the divided file and a stop flag to the end of the file respectively. A storing function 9 stores the file to which the flags are attached in each external storage device 13. When an inputted file name is the same as a file name in the device 13 and their flags are also equal, a controlling function 5 stores a file read from the device 13 by a data reading function 12 in the RAM 3 with a storing function 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file management apparatus, a file management method used therefor, and a recording medium storing a control program therefor, and more particularly to a file management method for dividing a file and storing the divided file in a plurality of external storage devices. .

[0002]

2. Description of the Related Art Conventionally, in a file management system of this type, a CPU (central processing unit), a RAM (random access memory), and a ROM (read only memory) are provided.
Memory), an input device, a display device, an input / output device,
An external storage device.

A file management device used in this system has a data input function, a function of storing data in a RAM, a function of detecting the type of an external storage device, and a function of dividing data according to the total free space of the external storage device. , A function of adding a start flag and a stop flag to the divided data, a determination function, a function of storing the divided file in an external storage device, and a function of dividing the divided data stored in the external storage device. Function to be stored in RAM and RAM
And a function of combining the data stored and divided into the data.

In this file management apparatus, one file stored in a RAM is divided into files according to the free space (for example, 1.44 megabytes, etc.) of a storage medium (for example, a floppy disk medium, etc.), and the files are divided. Files are respectively stored in a plurality of storage media.

In this case, the data must not be stored in the storage medium, and if the data is stored, the data of the file is stored so that the data has been stored in the storage medium for a long time. The data will be erased.

[0006] Since a start flag and a stop flag are added to data divided and stored in a plurality of storage media, when returning to the original file, the start flag and the stop flag are added to the data stored in the plurality of storage media. After deleting the stop flag and joining.

[0007]

In the above-mentioned conventional file management apparatus, since the type of the external storage device is set at the time of initial setting, the external storage device having a different storage capacity [for example, MO (Magneto Optical) or the like]. Removable Storage Medium] or an external storage device having a different storage medium format cannot be used simultaneously for file storage.

In other words, the conventional file division storage only supports storage mediums of the same type and the same format that are not stored at all, and other files are stored in the storage medium to be stored. It is not possible to store the divided files in storage media of different types or formats. In other words, in the related art, it is not possible to divide and save a file according to the free space of the storage medium.

Therefore, an object of the present invention is to solve the above-mentioned problems and to divide a file into storage media even when another file is stored in the storage medium to be stored or when the type or format is different. It is an object of the present invention to provide a file management device capable of being stored, a file management method used therefor, and a recording medium recording a control program therefor.

[0010]

According to the present invention, there is provided a file management apparatus comprising: a temporary storage unit for temporarily storing a file to be divided; a plurality of external storage units for storing the file;
Confirmation means for confirming the free space of the external storage device, division means for dividing the file stored in the temporary storage means from the beginning according to the free space confirmed by the confirmation means, Storage means for storing the divided files in each of the plurality of external storage devices.

In the file management method according to the present invention, a step of temporarily storing a file to be divided, a step of checking free space of a plurality of external storage devices for storing the file, and a temporary storage according to the checked free space And a step of storing the divided file in each of a plurality of external storage devices.

A recording medium on which a file management control program according to the present invention is recorded is a recording medium on which a file management control program for causing a computer to store and manage files is recorded. The file to be divided is temporarily stored, the free space of a plurality of external storage devices for storing the file is confirmed, the file is temporarily divided according to the confirmed free space from the beginning of the file, and the divided file is divided. The stored file is stored in each of the plurality of external storage devices.

That is, the file management device of the present invention comprises:
Large-capacity data exceeding the capacity of one external storage device is divided according to the free space of each external storage device for storing the data, and then stored in each external storage device.

More specifically, the file management device of the present invention stores the file to be divided in the RAM, checks the free space of the storage medium of the external storage device to be saved, and stores the file in the RAM according to the free space. The stored file is divided from the beginning and stored in an external storage device.

[0015] Accordingly, when the free space of the external storage device is not in a state where no data is stored (maximum storage capacity), such as when another file is stored in the external storage device, or when a different format is used. Even in this case, the file can be divided and stored according to the free space of the external storage device. Also, for external storage devices of different types, files can be divided and stored according to the free space of each external storage device.

[0016]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a file management device according to one embodiment of the present invention, and FIG. 2 is a block diagram showing a system configuration of a system using the file management device according to one embodiment of the present invention.

In these figures, a system using a file management apparatus according to an embodiment of the present invention includes a CPU (central processing unit) 21 and a ROM (read) connected to a bus (address bus and data bus, etc.) 100 mutually. (Only memory) 22, RAM (random access memory) 3, and input / output control device 24. The input / output control device 24 is connected with an input device 25, an external storage device 13, and a display device 27.

On the other hand, the file management apparatus according to one embodiment of the present invention has an input function 1, storage functions 2 and 6, and a split function 4
Control functions 5 and 7, a flag addition function 8, a storage function 9, a flag reading function 10, a flag determination function 11,
And a data reading function 12.

The input function 1 is a function for inputting data from the input device 25, and the storage function 2 is a function for storing data input from the input device 25 in the RAM 3 (RAM 23 in FIG. 2).

The dividing function 4 is a function for dividing the data stored in the RAM 3 according to the free space of the external storage device 13 (the external storage device 26 in FIG. 2). Flag addition function 8
Adds a start flag to the beginning of the divided file,
This function adds a stop flag to the end of the file. The storage function 9 stores the divided files in the external storage device 13.
It is a function to save to.

The flag reading function 10 is a function of reading a flag added to a file stored in the external storage device 13, and the flag determining function 11 is a function of determining a flag read from the external storage device 13.

The data reading function 12 is a function of reading a file divided and stored in the external storage device 13. The storage function 6 is a function of deleting the start flag and the stop flag from the read file, combining the divided files, returning to the original file, and storing the original file in the RAM 3.

FIG. 3 is a flow chart showing a processing operation when data stored in the RAM 3 of FIG. 1 is stored in the external storage device 13, and FIG. 4 is divided and stored in the external storage device 13 of FIG. 9 is a flowchart illustrating a processing operation when data is combined and stored in the RAM 3. The processing operation of the file management apparatus according to the embodiment of the present invention will be described with reference to FIGS.

For example, the data in the RAM 3 is the storage capacity of one floppy disk medium (for example, 1.4M).
A description will be given of a processing operation for storing this data in the external storage device 13 when there is a capacity (for example, 2 Mb) that cannot be stored in b). The processing operations shown in FIGS. 3 and 4 are realized by executing a program stored in a control memory such as the ROM 22.

In this case, first, the user secures an area in the external storage device 13 with an arbitrary file name. At this time, the control function 7 initializes the flag (step S3 in FIG. 3).
1) Check the capacity of the external storage device 13 to determine whether the area input from the input function 1 can be secured (step S2 in FIG. 3). When checking the capacity of the external storage device 13, the control function 7 checks the free capacity of the external storage device 13 from the number of free sectors and notifies the division function 4 of the free capacity.

The division function 4 responds to the notification from the control function 7, that is, the RA according to the free space of the external storage device 13.
The data is divided from the beginning of the file stored in M3 (step S3 in FIG. 3), and the divided file is sent to the storage function 9. This is because when the above file cannot be stored in only one external storage device 13,
3 is to divide and save the file in each open area.

At this time, the division function 4 notifies the flag addition function 8 of the capacity of the divided file via the control function 7, so that the flag addition function 8 is transmitted from the division function 4 sent via the control function 7. , A start flag is added to the beginning of the divided file, and a stop flag is added to the end of the file (step S4 in FIG. 3).

The start flag and the stop flag are the start flag # 1 and the stop flag # 1 in the first divided file, and the start flag # 1 in the second divided file.
2 and the stop flag # 2 are added by the flag adding function 8, and so on. The flag addition function 8 adds an end flag E to the end of the last file.

At this time, if there is still a file to be divided in the RAM 3 (step S5 in FIG. 3), the control function 7 saves the file added with the flag by the flag adding function 8
Is stored in each external storage device 13 (step S6 in FIG. 3). Thereafter, the control function 7 updates the flag (flag = flag + 1) (step S7 in FIG. 3), and then displays the replacement of the external storage device 13 on the display device 27 (FIG. 3).
Step S8), and instruct to replace the external storage device 13 (Step S9 in FIG. 3).

The above processing is repeated until there are no more files to be divided in the RAM 3 (steps S2 to S9 in FIG. 3). When there are no more files to be divided in the RAM 3 (step S5 in FIG. 3), the control function 7 adds an end flag E to the end of the last file by the flag addition function 8 (step S10 in FIG. 3). The file added with the flag in step 8 is stored in each external storage device 13 by the storage function 9 (step S1 in FIG. 3).
1).

Next, a description will be given of a processing operation when the data divided and stored in the plurality of external storage devices 13 are combined and stored in the RAM 3. First, the user operates the input device 2
Then, a file name is input from Step 5 (Step S21 in FIG. 4).

Then, the control function 5 initializes the flag to 1 (step S22 in FIG. 4). Thereafter, the control function 5 determines whether the file name input by the user is the same as the file name stored in the external storage device 13 (step S22 in FIG. 4), and displays if the file name is different. Device 2
7, an error display and a message urging the user to re-enter the file name are displayed, and the replacement of the external storage device 13 is displayed (step S28 in FIG. 4), and then the replacement of the external storage device 13 is instructed (FIG. 4). Step S29).

If the file names are the same, the control function 5 determines whether the start flag and the stop flag of the file stored in the external storage device 13 are equal to the flag to be read (step S24 in FIG. 4). When reading from the first external storage device 13, it is checked whether the start flag and the stop flag are each # 1, and thereafter the flag number is incremented by one every time the external storage device 13 is exchanged. Increase.

If the flags are not equal, the control function 5 indicates that the external storage device 13 has been replaced (step S5 in FIG. 4).
28), and instructs replacement of the external storage device 13 (step S29 in FIG. 4). If the flags are the same, the control function 5 reads the file from the external storage device 13 by the data reading function 12, and stores the file in the RAM 3 while deleting the start flag and the stop flag from the data by the storage function 6 (step in FIG. 4). S25).

At this time, if the end mark E has not been added to the file (step S2 in FIG. 4)
6) After updating the flag (flag = flag + 1)
(Step S27 in FIG. 4), after displaying the exchange of the external storage device 13 on the display device 27 (Step S28 in FIG. 4), the exchange of the external storage device 13 is instructed (Step S2 in FIG. 4).
9).

The above processing is repeated until the file to which the end mark E is added is read from the external storage device 13 (steps S22 to S29 in FIG. 4).
The control function 5 reads the file to which the end mark E is added from the external storage device 13 (step S2 in FIG. 4).
6) The data is stored in the RAM 3 while the start flag, the stop flag, and the end mark E are deleted from the data by the storage function 6 (step S30 in FIG. 4).
(Step S3 in FIG. 4)
1). The combination of the divided files is performed in the same manner as in the related art.

As described above, for example, large-capacity data exceeding the capacity of one floppy disk medium is divided according to the free space of each external storage device 13 for storing the data. Is stored in the external storage device 13 so that the free space of the external storage device 13 is not in a state where no data is stored (maximum storage capacity), such as when other files are stored in the external storage device 13. Even in the case of a different format, the file can be divided and stored according to the free space of the external storage device 13.

Also, for external storage devices of different types, such as MOs, files can be divided and stored according to the free space of each external storage device 13. As described above, the reading from each external storage device 13 is performed based on the file name and the flag number. Therefore, even when the files are divided and stored in the storage media of different formats,
It is easy to read and combine files.

[0039]

As described above, according to the present invention, the file to be divided is temporarily stored, the free space of a plurality of external storage devices for storing the file to be divided is checked, and the free space is adjusted according to the checked free space. By dividing the temporarily stored file from the beginning and storing the divided file in each of a plurality of external storage devices, the case where other files are stored in the storage medium to be stored or the Alternatively, even if the formats are different, there is an effect that the file can be divided and stored in the storage medium.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a file management device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a system configuration of a system using a file management device according to one embodiment of the present invention.

FIG. 3 is a flowchart showing a processing operation when data stored in a RAM of FIG. 1 is stored in an external storage device.

FIG. 4 is a flowchart showing a processing operation when data divided and stored in the external storage device of FIG. 1 are combined and stored in a RAM.

[Explanation of symbols]

 Reference Signs List 1 input function 2, 6 storage function 3 RAM 4 division function 5, 7 control function 8 flag addition function 9 storage function 10 flag reading function 11 flag determination function 12 data reading function 13 external storage device 21 CPU 21 22 ROM 24 input / output control device 25 input device 27 display device

Claims (12)

[Claims] 1. A temporary storage unit for temporarily storing a file to be divided, a plurality of external storage devices for storing the file, a confirmation unit for confirming a free space of the external storage device, and a confirmation unit for confirming a free space of the external storage device. A dividing unit that divides the file stored in the temporary storage unit from the beginning according to the free space; and a storage unit that stores the file divided by the division unit in each of a plurality of external storage devices. Characteristic file management device. 2. The file management apparatus according to claim 1, wherein said confirmation means is configured to confirm the free space of said external storage device from the number of free sectors of said external storage device. 3. The storage device according to claim 1, wherein the storage unit adds a flag indicating a head and a tail to a head and a tail of the file divided by the division unit, and stores the file in the external storage device. 3. The file management device according to claim 1, wherein 4. A reading means for reading the file from the external storage device in response to an external instruction, and wherein the reading means deletes the flag from the beginning and end of the file read from the external storage device, and 4. The file management apparatus according to claim 3, further comprising a storage unit for storing the data in the storage unit. 5. A step of temporarily storing a file to be divided, a step of checking free space of a plurality of external storage devices for storing the file, and a step of starting the file temporarily stored according to the checked free space. And a step of storing the divided files in each of a plurality of external storage devices. 6. The file management method according to claim 5, wherein in the step of checking the free space, the free space of the external storage device is checked from the number of free sectors of the external storage device. 7. The step of storing the divided file in each of a plurality of external storage devices includes adding a flag indicating a head and a tail to a head and a tail of the divided file, respectively, and storing the divided file in the external storage device. 7. The file management method according to claim 5, wherein the file is stored. 8. A step of reading the file from the external storage device in response to an external instruction, and a step of temporarily storing the file read from the external storage device while deleting the flag from the beginning and end of the file. 8. The file management method according to claim 7, wherein: 9. A recording medium recording a file management control program for causing a computer to perform file storage management, wherein the file management control program causes the computer to temporarily store a file to be divided, and To check the free space of a plurality of external storage devices for storing the file, split the temporarily stored file from the beginning according to the checked free space, and store the divided file in each of the plurality of external storage devices A recording medium on which a file management control program is recorded. 10. The file management control program, when causing the computer to check the free space, causes the computer to check the free space of the external storage device from the number of free sectors of the external storage device. A recording medium recording the file management control program according to claim 9. 11. The file management control program, when causing the computer to store the divided file in each of a plurality of external storage devices, indicates the beginning and end of the divided file at the beginning and end, respectively. 11. A recording medium storing a file management control program according to claim 9, wherein a flag is added and stored in the external storage device. 12. The file management control program causes the computer to read the file from the external storage device in response to an external instruction, and deletes the flag from the beginning and end of the file read from the external storage device. 12. A recording medium recording the file management control program according to claim 11, wherein the file management program is temporarily stored.