JPS6390088A - Recording information managing system for optical disk - Google Patents

Abstract

PURPOSE:To reduce useless consumption in the recording capacity of an optical disk by recording management information in a rewritable recording medium. CONSTITUTION:When an optical disk device 1 or the like is replaced, the identification (ID) code of the replaced device 1 and control information such as a data directory and the file allocation table of a tape (n) in a recording address are written in a hard disk 3. A processor 4 decides the coincidence between the ID code of the device and an ID code written in the disk 3 and then accesses the device 1 based on the control information of the disk 3. Thereby, it is unnecessary to write the control information in the device 1 and only the data information is written in the device, so that the useless consumption of storage capacity can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a recorded information management system for optical discs, and more particularly to a recorded information management system that is particularly effective for write-once optical discs.

[Prior art]

Optical discs record data information that is directly used as information such as images and documents, directories for these data, and management information such as a file allocation table that is a table of these recording addresses. This is done using the directory and file allocation table above.

〔the purpose〕

Therefore, whenever a file is written, modified, or deleted, the above directory and file allocation table will be rewritten every time.Especially on optical discs such as write-once optical discs where the above writing is frequently performed, the file allocation table will be rewritten. It is necessary to prepare a very large area as a recording area, and most of the recording capacity of the disk is consumed by this file allocation table 1.

The present invention aims to provide a new method for effectively utilizing the recording capacity of an optical disc by reducing wasteful consumption of the recording capacity by the file allocation table and the like.

〔composition〕

The configuration of the present invention will be explained using the principle example shown in FIG.

In this embodiment, an optical disk device 1, a memory 2 that stores data exchanged between the optical disk device,
A hard disk device 3 that stores management information for reading or writing management information of the optical disk set in the optical disk device, and a processor 4 that controls information transfer between these devices and processes recorded data.
are connected via bus 5.

At system startup and when replacing optical disks, the optical disk device 1 uses the logical sector address specified when reading and writing required data and the physical sector address that indicates the actual recorded position on the optical disk. Management information including a conversion table for converting between addresses is read from the set optical disk, and this management information is copied to the hard disk 3.

For example, when the processor 4 transfers a command and correction data to modify data written on a write-once optical disk, the correction data is recorded in the free space of the write-once optical disk and is also stored in the hard disk 3. The physical sector address corresponding to the logical sector address of this data in the conversion table of the management information is rewritten to the address of the area where this modified data has been written.

When an optical disk read command that specifies the logical sector address of data to be read arrives from the processor 4, the optical disk device 1 converts this logical sector address into a physical sector address using the above conversion table, and the data recorded at this physical address is The data stored therein is read and transferred to the processor 4.

When completing such processing and finishing the work, when replacing the optical disk, or when other necessity arises, the management information stored in the hard disk 3 is transferred to the optical disk device 1 and this management information is transferred to the optical disk device 1. Record to free space on an optical disc.

In FIG. 1, an external storage device 6 indicated by a dotted line is further shown, and the above-mentioned identification code and management information are stored in this external storage device made of a recording medium such as a magnetic bubble memory, a magnetic disk, or a magnetic tape. It is clear that it can be recorded in In addition, since it is sufficient to record only the latest management information, the amount of information is not so large even if the identification code is included. may be provided within the processor 1 to record the information.

FIG. 2 shows the concept of the operation of another embodiment of the present invention. In this embodiment, an identification code is recorded on each optical disc to prevent errors caused by exchanging optical discs. This identification code is transferred and stored in the hard disk 3 in addition to the management information in the above embodiment to confirm the optical disk, and this point is also illustrated in this flowchart. Note that the following circled numbers correspond to the circled numbers in the figure.

When starting up the system or replacing an optical disk, the check process shown in the dotted line and marked ■' in this flowchart is first performed. This process first checks the presence or absence of information recorded on the hard disk, and if management information is recorded, reads the identification code from the optical disk and compares it with the identification code recorded on the node disk. (2) If these match, then the management information recorded on the hard disk also relates to this optical disk, so this check process 1' is ended.

However, as a result of the above comparison (■), if the identification code recorded on the hard disk and the identification code from the optical disk do not match, the management information recorded on the hard disk is the management information of another optical disk. If there is a discrepancy, an error message indicating that the optical disc needs to be replaced will be displayed. If the identification codes match after replacing the optical disc, this check process will be performed as described above.
', reads the management information from the optical disk, records this management information together with the identification code on the hard disk (2), and completes the start process (2).

If there are no records left on the hard disk when starting up or replacing the optical disk as described above, it is normal, and the identification code and management information are read from the optical disk, recorded on the hard disk using ■ and ■, and the check process including ■' is started. Finish the process■ and wait for a processing request■
do.

The write/read process when there is a request to read or write to an optical disk from the processor is shown as ■.This process reads the identification code from the optical disk and compares it with the identification code recorded on the hard disk. ] to check whether the correct optical disc is set, and if these identification codes do not match, an error message 0 is displayed instructing the optical disc to be replaced,
If these identification codes match, it is determined whether the write/read request is for writing/reading data on the optical disk or for writing/reading management information, and depending on the result of this judgment, write/read 0
, (2), the writing/reading process (2) is completed, and the processing request waiting state (3) is entered again.

When a termination request arrives from the processor while in the standby state for this processing request, termination processing (■) is performed, and this process involves reading the identification code from the optical disk (■) and recording on the hard disk in the same way as in the write/read processing (■) above. The optical disc is checked by comparing the identification codes that are currently being used and by displaying an error message if the comparison results do not match.If a match is confirmed, the management information for the future disc recorded on the hard disk is transferred to the optical disc device. ■ to write to an optical disc.

When this writing is completed, the identification code and management information recorded on the hard disk are erased and all processing is completed.

In the above embodiments, a hard disk is used as a recording medium for recording management information, but information written in such a recording medium takes into consideration the possibility of a power cut or system down. Writable recording media that can be maintained even under such conditions, such as EP
It is desirable to use a nonvolatile memory such as ROM, a magnetic bubble memory, or a magnetic recording medium such as a magnetic disk or magnetic tape d).

〔effect〕

According to the present invention, since the management information of the optical disc is not written on the optical disc one by one, the recording area for management information can be reduced, and therefore the data recording area can be increased, so the recording capacity of the optical disc can be increased. It can be used effectively, and it becomes possible to record a large amount of data such as image data.

Furthermore, if the hard disk or magnetic disk of the processor system is used as a recording medium for management information according to the present invention, the processor system can obtain the necessary information by accessing these disks, so from the processor system's perspective, it is an optical disk. It is sufficient to perform the same processing as if the data were recorded on this hard disk or magnetic disk, thus achieving the special effect that the optical disk can be used as a disk under the control of the disk operating system of the processor system. be able to.

[Brief explanation of the drawing]

FIG. 1 is a principle embodiment of the present invention, and FIG. 2 is a flowchart showing the concept of operation of the embodiment of the present invention. Hara 1A A small amount of money) γ What matter 1 Figure

Claims (6)

[Claims] (1) A recorded information management method for an optical disc, characterized in that management information for managing the contents of data information recorded on an optical disc is recorded on another rewritable recording medium. (2) Management information for managing the content of data information recorded on an optical disc is recorded on the optical disc, this management information is transcribed onto another rewritable recording medium, and the management information transcribed onto this other recording medium is managed. A recorded information management method for an optical disc, characterized in that data information recorded on the optical disc is manipulated using the information, and management information updated by this manipulation is transferred to the optical disc. (3) The recorded information management system for an optical disc according to any one of claims 1 to 2, wherein the other recording medium is a semiconductor nonvolatile memory. (4) The recorded information management system for an optical disk according to any one of claims 1 to 2, wherein the other recording medium is a magnetic bubble memory. (5) The recorded information management system for an optical disk according to any one of claims 1 to 2, wherein the other recording medium is a magnetic disk. (6) The recorded information management system for an optical disk according to any one of claims 1 to 2, wherein the other recording medium is a magnetic tape.