JP2000187606A - File system managing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize simple and highly functional file management which can be applied to a built-in computer or an inexpensive computer system or the like. SOLUTION: A CPU 3 of a file system managing device of a system equipped with an information recording and reproducing device for recording and reproducing data for an information recording medium and the controller of the information recording and reproducing device, executes the file system program of a ROM 1, and operates each kind of file management such as the permission and inhibition of the file execution of the information recording medium based on the data of a management file on a RAM 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a CD-R, a CD-R,
Optical disks such as RW, DVD-R, and DVD-RW;
The present invention relates to a file system management device that manages a file system of data for an information recording medium such as a magneto-optical disk such as an MO, a magnetic disk such as an HD, an FD, an LS 120, and a ZIP, and a memory card such as a RAM and a ROM.

[0002]

2. Description of the Related Art A file system is a system that manages storage units of the above-described various information recording media by the devices and provides them to users in units of files in order to make various information recording / reproducing apparatuses easy to use. . The storage units are put together and provided to the user in the form of a file.

[0003] In many file systems, not only that, but also a function of a directory that divides files collectively is provided.
It provides features to manage update dates and allow only specific users to read and write specific files and directories.

For example, the floppy disk file system described in Japanese Patent Application Laid-Open No. 5-158758 has a management file in which the file arrangement on the floppy disk is recorded, and a plurality of files on the floppy disk are connected to be continuous. It was intended to be processed as one file.

[0005] Conventionally, such functions provided by the file system have been provided to host computers, workstations, and personal computers that have a hard disk and can always maintain power.

[0006]

However, as the size of computers has been reduced, the number of computers owned per person has increased, and the hard disk drives and power supplies have been limited due to factors such as lower prices of the devices themselves. An appropriate file system is needed in the environment.

However, the conventional file system depends on the file system architecture such as a specific hard disk or floppy disk.
There has been a problem that it is difficult to use it in other various information recording / reproducing devices as described above, or it is difficult to implement it.

The present invention has been made in view of the above points, and has as its object to realize simple and high-performance file management applicable to an embedded computer, a low-cost computer system, and the like.

[0009]

According to the present invention, there is provided an information recording / reproducing apparatus for recording and reproducing data on / from an information recording medium, and a system provided with a control device for the information recording / reproducing apparatus. In the file system management apparatus, a file management means for managing various files of the information recording medium is provided.

In the above-described file system management apparatus, the file management means may be provided with a presence / deletion management means for managing the existence and deletion of a file.

Further, in the file system management apparatus as described above, it is preferable that the file management means is provided with a visibility / invisibility management means for managing visualization and invisibility of the file.

In the above file system management apparatus, the file management means may be provided with a file execution permission / prohibition management means for managing permission and prohibition of file execution.

In the above-described file system management apparatus, the file management means manages permission and prohibition of reading a file.
Prohibition management means may be provided.

In the above-mentioned file system management apparatus, the file management means manages permission and prohibition of writing to the file.
Prohibition management means may be provided.

Further, in the above file system management apparatus, it is preferable that the file management means is provided with a last file writing time management means for managing the writing time of the last file.

In the above file system management apparatus, the file management means may be provided with a file deletion permission / prohibition management means for managing permission and prohibition of file deletion.

Further, in the above file system management apparatus, the file management means may be provided with a file owner name management means for managing a file owner name.

Further, in the above file system management apparatus, it is preferable that the file management means is provided with a directory management means for managing a directory.

According to the file system management apparatus of the present invention, since the file management means for managing various files of the information recording medium is provided, the functions of the file system are realized based on a specific management file. Thus, the file system itself can be simplified. Therefore, the file system plays the role of merely arranging files, and other functions can be implemented as optional.

[0020]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 2 is an external perspective view of the front surface of the file system management apparatus according to the embodiment of the present invention. In this file system management apparatus, an optical disk drive and a memory card drive are housed in a single housing.

The switches on the front panel on the front of the file system management apparatus are a start switch 20 of the apparatus, a transfer start instruction switch 21 corresponding to an instruction means for starting the transfer of information, and an optical disk removal / storage switch 22. .

On the other hand, the information recording medium accommodates an optical disk such as a CD-R / RW through an optical disk storage tray 23 and a memory card (not shown) through a memory card insertion slot 24. The audio input terminal 25 connects a microphone or audio equipment (not shown). Further, the infrared light receiving section 26 receives an infrared signal for instructing various operations from a remote place by a remote control device described later.

Although not shown, by inputting the numbers assigned to all the information recording / reproducing devices connected to the file system management device, the information recording / reproducing device of the transfer source and the transfer destination is selected and inputted. It also has a key.

FIG. 3 is an external perspective view of the back of the file system management apparatus according to one embodiment of the present invention. A power supply socket 28, a parallel port 29 for connecting an external device such as a printer (not shown), a serial port 30 for connecting another digital input / output device also not shown, and a stereo audio output terminal 31 are provided on the back of the device. And 3
2, a video image output terminal 33 and the like.

FIG. 1 is a block diagram showing the internal configuration of a file system management device according to one embodiment of the present invention. This file system management device is realized by a microcomputer.

The ROM 1 is a read-only memory, and is a non-volatile memory storing a minimum start-up program of the apparatus and a file system program according to the present invention. It is more preferable to use a rewritable non-volatile memory. .

The RAM 2 is a memory used when the CPU 3 executes various kinds of processing. The RAM 2 temporarily stores and manages management files and work areas related to the present invention, format conversion, and information to be transferred. Read / write memory used for storage.

The CPU 3 controls the overall operation of the file system management device, and also executes various processes of the file system management function according to the present invention. In addition, since a timer is recently installed in the CPU for embedding, the access time to the file can be obtained by using the time of the timer.

The audio-video processor 4 is a processor that performs audio and video processing, and displays the contents of the information being transferred, the result of the transfer, the progress of the transfer, the state of the apparatus, and the like on a display device such as a television or a display. 12, or output by a speaker 13. Further, it is also possible to input a voice and record the voice on the information recording / reproducing apparatus.

The parallel interface (IF) 5 mainly exchanges information with a printer (not shown) connected through the parallel port 29. It is also possible to connect another similar device or host computer. The serial interface (IF) 6 connects many digital input / output devices (not shown) via the serial port 30 and manages transmission and reception of information with the devices. Further, connection with a host computer is also possible.

Front panel interface (IF) 7
Is an interface that controls various switch inputs such as the transfer start instruction switch 21 and the like, and turns on an LED and the like, receives an input instruction from the interface, and notifies the LED of a transfer result, a progress status, a device state, an operation result, and the like. be able to.

Infrared interface (IR / IF) 8
Controls transmission and reception of infrared signals with a remote control device (not shown). When the remote control device is wired, it serves as an interface for the remote control device.

The memory slot 9 is a slot for loading and unloading a memory card of a portable recording medium through the memory card insertion slot 24. A memory card (not shown) is inserted into the memory slot 9 to read and write information. The CD-R / RW drive 10 can also drive a CD-R / RW
An information recording medium such as a / RW medium is inserted to read and write information.

The memory slot 9 and the CD-R / RW
The drive 10 may include a plurality of drives, respectively, or may be another type of information recording / reproducing device. In the case of a magnetic disk device such as a hard disk, a higher-speed read / write operation can be expected.

The bus 11 is a communication line for exchanging information between the above units. The file system program according to the present invention includes the memory card
The program may be read from the D recording medium and activated.

That is, this file system management apparatus is an apparatus provided with an information recording / reproducing apparatus for recording and reproducing data on an information recording medium and a control device for the information recording / reproducing apparatus.

Then, the above ROM1, RAM2, and C
PU3 and the like, file management means for managing various files of the information recording medium, existence / deletion management means for managing the existence and deletion of files, and visibility / invisibility management means for managing visualization and invisibility of files. The function of file execution permission / prohibition management means for managing permission and prohibition of file execution, and the function of file read permission / prohibition management means for managing permission and prohibition of file reading.

File write permission / prohibition management means for managing permission and prohibition of writing to a file, last file write time management means for managing the write time of the last file, and permission and prohibition of file deletion. File delete permission / prohibition management means, file owner name management means for managing file owner names, and directory management means for managing directories.

FIG. 4 is a diagram showing an example of the format of a management file used in the file system management device.

As shown in FIG. 4A, the management file 40 has a file name field 41, an existence / deletion field 42, a display / concealment (visualization / invisible) field 43, a file execution permission / prohibition field. 44,
File read permission / prohibition field 45, file write (file change) permission / prohibition field 46,
A last file change (final file write) time field 47, a file deletion permission / prohibition field 48, a file owner (file owner name) field 49, and a directory field 50 are provided.

The size of each field is shown in the drawing (for example, the size of the existence / deletion field is 1 bit).

When executing various applications, the CPU 3 refers to these fields to restrict the use of each file on an information recording medium such as a CD-R disc, a CD-RW disc, or a memory card, Execute various file system management processes such as checking the update time.

The existence / deletion field 42, display / hide field 43, file execution permission / prohibition field 44, file read permission / prohibition field 45, file write permission / prohibition field 46, and file deletion permission / prohibition field 48 , Representing boolean
Stores the value of a bit. File name field 4
The 1 and file owner fields 49 store data of character strings, numerical values, and symbols.

Further, in the last file change time field 47, a value representing the time, for example, if the time is 11:55 pm on September 1, 1999, "1999901235
A numerical value such as 5 "is stored.

The files can be organized using the directory field 50. The files in the directory are a list of files included in the directory, as shown in FIG.

FIG. 7B shows "An" which is made later.
It shows a state where the file “Bear” and the file “Cat” are stored in the “imal directory”. Therefore, it is possible to show the user that the files "Bear" and "Cat" are stored under the "Animal directory".

FIG. 5 is a flowchart showing a file management process in the file system management apparatus. CPU3
Creates a management file from a state in which the management file has never existed in step (indicated by “S” in the figure) 1. At this time, the file names in the file name field 41 must not overlap. At the same time, the fields 41 to 50 in the management file 40 are also set in advance.

First, based on the flag of the display / hide field 43, the file is visualized or invisible. At the time of processing based on an arbitrary application program in step 2, the file execution permission / prohibition field 44
File access permission flag, file read permission flag 45 in file read permission / prohibition field 45, or file write permission flag in file write permission / prohibition field 46. I do.

While the file is being accessed in step 3,
The access is locked so as not to be accessed from the processing by another program, and when the access is completed, the state is returned to the existing state based on the flag of the existence / deletion field 42.

When the file field is changed in step 4, the file writing permission / prohibition field 4
When the field change operation is started based on the flag of No. 6, a lock is applied to prevent access from processing by another program. Then, after the field is actually changed in step 5, the lock is released, and the state is returned to the existing state based on the flag of the existing / deleted field 42.

When a file is to be deleted in step 6, the file delete permission / inhibition field 48 is checked based on the flag of the file delete permission field 48, and the existence / deletion field 42 is changed.

On the other hand, when it is desired to recover from the deletion in step 7, the existence / deletion field 42 is changed in consideration of the file name not to collide. Then, the last file change time field 47 is updated each time each of the steps 1 to 7 is performed. In addition, the owner name of each file is displayed based on the data in the file owner field based on a request from the user.

As described above, this file system management device is a file system having abundant functions even in a limited situation such as a write-once type information storage medium or an information recording / reproducing device having only a simple file system. The system can be realized.

Further, based on the data in the existence / deletion field of the management file, the file can be regarded as deleted without actually being deleted, and the file operation can be performed at high speed because the actual deletion operation is not required. Can be operated. In addition, it is possible to easily return from the deletion to the existence, and the file can be restored.

Further, it is possible to determine whether or not to show the file to the user based on the data in the display / hide field of the management file, and to conceal files which are necessary for various operations and are difficult to delete. Thus, it is possible to prevent such files from being deleted indiscriminately.

Also, the file execution permission of the management file
Based on the data in the prohibited field, users can be prohibited from executing files without permission, so that files that can only be executed in specific situations or files that exist because they are called from other programs are not executed without permission. can do.

Further, based on the data in the file read permission / prohibition field of the management file, the file read permission and the write permission and the prohibition of reading of a specific file are prohibited, thereby keeping the secrecy of the user data or prohibiting the writing. To prevent overwriting of files that would otherwise be difficult to update.

Further, the last access time of the file is recorded and stored based on the data in the last file change time field of the management file, so that the order of update and the last update time can be easily known. be able to. For example, at the time of backup, only files updated from the time of the previous backup can be backed up, and the consumption of the information storage medium can be reduced.

Further, based on the data in the file deletion permission / prohibition field of the management file, it is possible to prevent the user from arbitrarily deleting the file. For example, if a file such as a system file that is essential to the formation of the device itself is deleted, it will immediately affect the operation of the device.
If implemented simultaneously with the delete field, the existence / delete field can be made available only if the file is permitted to be deleted by the data in this field.

Also, based on the data in the file owner name field of the management file, the owner (usually the creator) of the file can be identified, and can be distinguished from the file of another person. Secrets are easier to keep.

Further, based on the data in the directory field of the management file, a directory storing one or more files can be expressed. In addition,
Although a multi-level directory structure can be expressed, the operation of the file system may be slow because the structure is complicated.

[0062]

As described above, according to the file system management apparatus of the present invention, since the file management means for managing various files of the information recording medium is provided, it can be used in an embedded computer or a low-cost computer system. Applicable simple and sophisticated file management can be realized.

[Brief description of the drawings]

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

FIG. 2 is an external perspective view of a front surface of the file system management device according to the embodiment of the present invention.

FIG. 3 is an external perspective view of a back surface of the file system management device according to the embodiment of the present invention.

FIG. 4 is a diagram showing a format example of a management file used by the file system management device.

FIG. 5 is a flowchart showing a file management process in the file system management device.

[Explanation of symbols]

1: ROM 2: RAM 3: CPU 4: Audio video processor 5: Parallel IF 6: Serial IF 7: Front panel IF 8: IR / IF 9: Memory slot 10: CD-R / RW drive 11: Bus 12: Display Device 13: Speaker 20: Start switch 21: Transfer start instruction switch 22: Optical disk removal and storage switch 23: Optical disk storage tray 24: Memory card insertion slot 25: Audio input terminal 26: Infrared light receiving unit 28: Power supply socket 29: Parallel port 30: serial port 31, 32: stereo audio output terminal 33: video image output terminal 40: management file 41: file name field 42: existence / deletion field 43: display / concealment (visualization / invisible) field 44: file execution permission・ Prohibited feel 45: File read permission / prohibition field 46: File write (file change) permission / prohibition field 47: Last file change (last file write) time field 48: File deletion permission / prohibition field 49: File owner (file owner name) ) Field 50: Directory field

Claims (10)

[Claims] 1. An information recording / reproducing apparatus for recording and reproducing data on and from an information recording medium, and a file system management apparatus for a system including a control device for the information recording / reproducing apparatus. A file system management device, comprising: a file management unit for performing the file management. 2. The file system management apparatus according to claim 1, wherein said file management means includes existence / deletion management means for managing existence and deletion of a file. 3. The file system management device according to claim 1, wherein said file management means includes a visibility / invisibility management means for managing visualization and invisibility of a file. apparatus. 4. The file system management device according to claim 1, wherein the file management means includes a file execution permission / prohibition management means for managing permission and prohibition of execution of a file. A file system management device, characterized in that: 5. The file system management device according to claim 1, wherein the file management means includes a file read permission / prohibition management means for managing permission and prohibition of file read. A file system management device, characterized in that: 6. The file system management device according to claim 1, wherein the file management means includes a file write permission / prohibition management means for managing permission and prohibition of writing to a file. A file system management device. 7. The file system management apparatus according to claim 1, wherein the file management means includes a last file write time management means for managing a last file write time. File system management device. 8. The file system management device according to claim 1, wherein the file management means includes a file deletion permission / prohibition management means for managing permission and prohibition of file deletion. A file system management device, characterized in that: 9. The file system management apparatus according to claim 1, wherein the file management means includes a file owner name management means for managing a file owner name. File system management device. 10. The file system management device according to claim 1, wherein the file management unit includes a directory management unit that manages a directory.