JPH01158686A - Storage managing method for optical disk - Google Patents

Abstract

PURPOSE:To restore storing managing information to complete information when the registered storing managing information is incomplete by including a registration identification mark for identifying the information when the storing managing information to an optical disk is completely normally registered and erased. CONSTITUTION:The entire optical disk system is controlled by a system control part 1 to edit and process a picture read by a scanner 2 and read the picture registered to the optical disk 5 with a prescribed resolution. A magnetic disk device 6 stores a fault restoring file or the like consisting of managing information representing the recording information of a data file in the disk. The volume label VL to which a volume name for identifying the disk 5 is registered is set to the leading part of the storing area of the disk 5 and a managing information area MR and a data filing area DR are set to a succeeding registering area. The identification mark IDM of the area MR is stored in the leading part of the idle area of the managing information FM of this area MR to register the complete managing information by the mark IDM.

Description

[Detailed description of the invention] [Technical field] The present invention relates to a storage management method for optical discs.

[Prior Art] In recent years, optical disk devices that use disk-shaped optical disks as storage media have been put into practical use, and image data filing devices that handle large amounts of data,
Alternatively, it is applied to large-capacity auxiliary storage devices in electronic computer systems.

The surface of this optical disk has a track pitch of 1 to 2 μm.
m recording tracks are formed, and the surface condition (for example, reflectance) of the recording tracks is changed in accordance with the data to be recorded.

Data is recorded. Furthermore, in many cases, when recording data, the surface of the recording track is destroyed, so it is not possible to update recorded data on the same recording track.

Further, data is recorded/reproduced on an optical disk in units of sectors of a predetermined length, and data files are divided into sectors and usually stored in consecutive sectors. By recording data in units of sectors in this way, the degree of freedom in accessing files is increased, and error correction processing for correcting data errors can be performed efficiently.

In order to efficiently access the data recorded in this way, we need to know the file name to identify the file, the search information necessary to search for the file, and the sector numbers (sector addresses) of the multiple sectors that store the file. ) etc. forms storage management information (directory information). Note that the information included in this storage management information is appropriately set by the operating system, file management application program, etc. in the system using the optical disc device.

By the way, as mentioned above, since optical disks cannot be rewritten, storage management information that needs to be frequently rewritten has conventionally been stored in rewritable storage devices other than optical disks, such as fixed magnetic disk devices or flexible disks. It was stored on a magnetic disk (flexible disk) device, etc.

Then, when the optical disc is ejected from the optical disc drive device, the storage management information is registered on the optical disc.

However, with such conventional devices, if a power failure occurs in the system while using an optical disk, the storage management information registered on the optical disk becomes incomplete, and from then on, the data stored on the optical disk cannot be properly stored. This caused the inconvenience of not being able to access it.

[Purpose] The present invention was made in order to eliminate the disadvantages of the prior art, and provides an optical disc that can restore complete storage management information when the storage management information registered on the optical disc is incomplete. The purpose is to provide a memory management method.

[Configuration] The present invention provides that storage management information registered in other non-volatile storage devices is erased when registration to the optical disk is successfully completed, and that the storage management information is the latest storage management information at that time. If the storage management information includes a registered identification mark for identifying the storage management information, and the registration identification mark in the latest storage management information is not up to date when the optical disc is inserted into the optical disc drive, the non-volatile storage device The storage management information registered in the optical disc is restored based on the storage management information registered in the optical disc.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows an optical disc system according to an embodiment of the present invention.

In the figure, a system control section 1 controls the entire optical disc system, and also performs editing processing of images read by a scanner 2, various image processing, image compression processing, etc.

The scanner 2 is for reading images to be registered on an optical disc at a predetermined resolution, and the image buffer 3 serves as a work area etc. when editing images.

The optical disk device 4 is for recording/reproducing data on the optical disk 5, and the magnetic disk device 6 stores a failure recovery file etc. consisting of directory information (management information) indicating the recording status of data files on the optical disk 5. It is for remembering.

The operation display device 7 performs various operations for the operator to use this optical disk system, and
This is for displaying processing results. The operation display device 7 is also used to interact with the operating system and file management application programs executed by the system control unit l.

Here, for example, a plurality of such optical disk systems are installed and used in the same office, and therefore, the optical disk 5 may be transferred to another optical disk system for use.

In such a case, the management information stored in the magnetic disk device 6 is appropriately recorded on the optical disk 5 so that it can be used in other optical disk systems.

FIG. 2(a) shows the allocation status of storage areas on the optical disc 5. As shown in FIG.

The first part of the storage area of the optical disc 5 is set as a volume label area VL in which the volume name etc. for identifying the optical disc 5 is registered, and the storage area following it is set as
The information is sequentially set in the management information area MR and the data file area DR.

The data file area DR stores image data, etc., and the management information area H stores the data file area DR.
Management information (directory information) for efficiently accessing data files stored in the storage area is stored.

Further, the recording track formed on the optical disc 5 for recording/reproducing data is divided into sectors of a predetermined length, as shown in FIG. 2(b).

One sector includes a synchronizing signal S for synchronizing the reading system of the recording/reproducing head, a sector address A for identifying each sector, and data DT of a predetermined length.
Consisting of Information is stored/reproduced on the optical disc 5 in sector units.

An example of the management information stored in the management information area MR is shown in the same figure (
Shown in c).

This management information FM includes an identification mark IDM for identifying whether it is the latest management information FM at the time it is transferred from the magnetic disk device 6 to the optical disk 5, and file identification information for identifying each data file. PIF, and file map information FMP indicating the storage status of data files in the data file area DR.

The specific contents of this management information FM are appropriately set by the operating system and file management application program executed by the system control unit 1, and may include search information for searching files. be.

As shown in FIG. 3(a), the magnetic disk device 6 includes:
Disaster recovery file F corresponding to each optical disk 5
RCI-FRCQ and directory buffer DR
B is memorized. Note that the magnetic disk device 6 also stores various information required by the system.

The failure recovery file FRC is as shown in the same figure (b).
The volume name added to the optical disc 5 and the management information FM newly created by the system control unit 1 from when the optical disc 5 is loaded into the optical disc device 4 until it is ejected are arranged in chronological order. This is what happens.

The directory buffer DRB has a size corresponding to one sector, which is the minimum recording unit of the optical disc 5, as shown in FIG. This is to temporarily store the management/information FM newly formed by 1 in chronological order.

Then, when the newly created management information FM is accumulated by 1, for example, m111, and the directory buffer DRB becomes full, the system control unit 1 stores the newly created management information FM in the directory buffer DRH.
The management information FM stored in the management information area H of the optical disc 5 is sequentially stored from the beginning of the empty area of the management information area H, and then the contents of the directory buffer DRH are cleared.

Furthermore, at the time when the optical disc 5 is ejected from the optical disc device 4, the system control unit 1 stores all the management information FM remaining in the directory buffer DRB from the beginning of the empty area of the management information area MR of the optical disc 5. The contents of the directory buffer DRB are cleared sequentially, and when the storage is completed normally, the failure recovery file FR corresponding to the optical disk 5 is stored.
Delete C.

Then, when the system control unit 1 stores the management information FM of the magnetic disk device 6 in the optical disk 5 in this way, the system control unit 1 stores the management information FM at the time of ejecting the optical disk 5.
For the latest version of M, the identification mark IDM is ``
For other marks, the identification mark IDM is set to "0".

Therefore, for example, the optical disc 5 is transferred to the optical disc device 4.
When the disc is ejected, all management information F is stored on the optical disc 5.
If M can be stored properly, as shown in FIG.
"become.

On the other hand, if, for example, a power failure occurs while the management information FM is being stored on the optical disc 5, and all the management information FM cannot be properly stored on the optical disc 5,
As shown in (e) of the same figure, the identification mark IDM (
IDM8) becomes rQJ.

Thereby, the system control unit 1 can determine whether the management information FM stored on the optical disc 5 is appropriate.

Furthermore, the failure recovery file FRC stored in the magnetic disk unit N6 is stored in the management information FM when the optical disk 5 is ejected.
is deleted from the magnetic disk device 6 only when the management information FM is completely stored on the optical disk 5, and in other cases, for example, when the power is cut off while the management information FM is being stored on the optical disk 5 as described above. In this case, the magnetic disk device 6
remains.

Therefore, the system control unit 1 refers to the failure recovery file FRC remaining in the magnetic disk device 6 that has the same volume name as the target optical disk 5, and restores the file stored in the optical disk 5. The management information FM can be completely restored.

With the above configuration, when the optical disc 5 is loaded into the optical disc device 4, the system control unit 1 executes the process shown in FIG.
If it is not appropriate, the failure recovery file FRC remaining in the magnetic disk device 6 is referred to and its contents are restored.

That is, first, the volume name of the set optical disk 5 is read, and it is checked whether a failure recovery file FRC having the same volume name is stored in the magnetic disk device 6 (determination 101).

If the result of judgment 101 is YES, the set optical disk 5 does not store normal management information FM, so the contents of the management information area MR of the optical disk 5 are changed based on the contents of the failure recovery file FRC. (processing 102). And that disaster recovery file FRC
Clear the contents and move on to the next process.

If the result of judgment 101 is NO, the failure recovery file F with the volume name of the set optical disk 5 is
Process 103 to newly generate RC in the magnetic disk device 6
), it is checked whether the identification mark IDM of the management information FM immediately before the empty area of the management information area MR of the optical disc 5 is set to rlJ (determination 104).

When the result of this judgment 104 is YES, since appropriate management information FM is stored on the optical disk 5, a registration start process 105 is executed in which all of the management information FM is read out and expanded to the magnetic disk device 6. Note that this registration start processing 105 includes processing for initializing the internal states of the system and system processing section 1 so that the optical disc 5 can be used.

When the result of determination 104 is No, the failure occurred in the optical disk 5 while it was being used in another optical disk system, and this optical disk system cannot recover from the failure, so the system control unit 1 The operator is notified of this via the operation display device 7 (process 106).

In this way, when using the optical disc 5, the management information area MR of the optical disc 5 is restored to an appropriate state, so even if a failure occurred while using the optical disc 5 last time, can access the optical disc 5.

From now on, whenever the optical disk 5 is accessed and its contents are updated, the management information FM is newly generated in the magnetic disk device 6, and as mentioned above, the management information FM is stored in the failure recovery file FRC in chronological order. is stored in
Further, the data is stored on the optical disc 5 after being temporarily stored in the directory buffer DRB.

Then, when ejecting the optical disc 5, 1. - The management information FM stored in the heli-buffer DRB of the first helibuffer is stored on the optical disk 5, and the identification mark If3M of the latest management information FM is "1".
is set to Further, the identification mark IDM of the other management information FM is set to "0" as described above.

The other functions of this optical disc system are as follows:
Since it is not directly related to the present invention, the explanation will be omitted.

As described above, according to this embodiment, even if a failure such as a power outage occurs during use, the contents of the management information stored on the optical disk can be restored to an appropriate state, so that the optical disk can be used after that. Appropriate access.

In the above-described embodiment, the present invention was applied to the optical disc system shown in FIG. 1, but the present invention can also be applied to optical disc systems having other configurations.

[Effects] As explained above, according to the present invention, storage management information registered in other nonvolatile storage devices.

The storage management information includes a registration identification mark to identify that it is the latest storage management information at that time, and is erased when the registration on the optical disc is successfully completed.
When an optical disc is installed in the optical disc parking device, if the registration identification mark of the latest storage management information is not in the latest state, the optical disc is Since the registered storage management information is restored, if the storage management information registered on the optical disc is incomplete.

The storage management information can be completely restored, and from then on,
To obtain the effect of appropriately accessing an optical disk.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an optical disc system according to an embodiment of the present invention, FIG. 2(a) is a signal arrangement diagram showing an example of allocation of storage areas of an optical disc, and FIG. 2(b) shows an example of sector configuration. Fig. 3 (C) is a signal arrangement diagram showing an example of management information; Fig. 3 (a) is a signal arrangement diagram illustrating part of the storage contents of a magnetic disk device; Fig. 3 (b) is a signal arrangement diagram illustrating a part of the storage contents of the magnetic disk device; A signal allocation diagram showing an example of a recovery file, (c) a signal allocation diagram showing an example of a directory buffer, (d) of the same figure.
is a schematic diagram illustrating the identification mark in a normal case, and the same figure (e
) is a schematic diagram illustrating an example of an identification mark when a failure occurs, and FIG. 4 is a flowchart 1- showing an example of processing by the system control unit. Figure 1 Figure 2 (a) (b) Figure 3

Claims (1)

[Claims] Storage management information for an optical disc that is formed from the time the optical disc is inserted into the optical disc drive until it is ejected is stored in another nonvolatile storage device, and the storage is stored in that nonvolatile storage device when the optical disc is ejected. When management information is registered in the storage management information area of the optical disk and the registration is successfully completed, the storage management information stored in the nonvolatile storage device is erased, and the storage management information is stored in the storage management information. It includes a registration identification mark to identify whether the optical disc is the latest one at the time of ejection, and when the optical disc is loaded into the optical disc drive device, the latest storage management information registered in the storage management information area of the optical disc is displayed. When the registration identification mark is not set to the latest state, it is determined that the storage management information stored on the optical disc is defective, and when the storage management information is stored on the nonvolatile storage device, A storage management method for an optical disc, comprising restoring storage management information stored on the optical disc using the contents.