JPS6211928A - Storage control system for optical disk - Google Patents

Abstract

PURPOSE:To improve the storage control performance of an optical disk by storing both the document information and the retrieval information in the most outer side of the storage area of the optical disk with the related picture information stored in the inner side area of the disk respectively and including the picture retrieval information to the first retrieval information. CONSTITUTION:A prescribed range at the most outer side of an optical disk 1 is defined as a code information recording area AC where both the document information and the discrimination information are stored. While the inner area of the disk 1 is used as a picture storage area AI where the picture information related with the document information. A recording track equivalent to a single circumference of the disk 1 is divided into eight sectors. Each of these sectors consists of the header information HD used for discrimination of sectors and the data DT of the prescribed length. The data DT on the area AC is available in two types of information, i.e., the retrieving document information Fkd consisting of the retrieval information for discrimination of the document information and a part or the whole of the document information and the document information DTc. The information Fkd has a style as shown in the diagram.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a storage management system for optical discs that allows highly reliable and efficient access to optical discs.

[Prior Art] In recent years, optical disk devices that use optical disks in which an optical storage medium is formed as a disc-L have been put into practical use, and are used as image data filing devices that handle large amounts of data or as large-scale applications in electronic computer systems. It is applied to capacity auxiliary storage devices, etc.

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

Furthermore, in many cases, optical discs are not rewritable and recorded data cannot be updated.

Generally, one file is stored in a continuous storage area on an optical disc, but in reality, the file is divided into sectors of a predetermined bit, and data is recorded in units of sectors. By recording data sector by sector 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, storage management information consisting of the file name, file length, sector number (sector address) of the first sector that stores the file, sector address of the last sector, etc. (directory information).

By the way, as mentioned above, since rewriting is not possible on optical discs, storage management information that is frequently rewritten has conventionally been stored in rewritable storage means other than optical discs,
For example, it was stored in a fixed magnetic disk device or a flexible magnetic disk device.

However, if the storage management information of the optical disc is stored in a separate device in this way, the storage management of the information is poor.
There was a problem in that managing the storage management information required time and effort.

[Purpose] The present invention was made in order to solve the problems of the prior art described above, and its purpose is to provide an optical disk storage management method that can improve the information storage management performance of an optical disk device. There is.

[Configuration] In order to achieve this object, the present invention stores document information and search information for this document information from the outermost side of the storage area on an optical disk, and stores the above-mentioned document information in the inner area of the storage area. Store relevant image information. By including search information for searching image information in the search information, documents can be appropriately managed. Furthermore, since the search information and document information are integrally stored in a continuous storage area, the optical disc can be used efficiently.

Hereinafter, one embodiment of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 shows an example of an optical disc 1. As shown, the optical disc 1 is made of a donut-shaped optical storage material with a spindle hole 2 formed in its center, and the innermost part is a drive It extends into the non-storage area 3 for protection from the chucking mechanism of the device (as shown). In addition,
A label for identifying the optical disc 1 may be attached to this non-storage area 3.

In addition, a predetermined range (for example, a radius of about 1710) from the outermost side of the storage area is set as a code information recording area AC for storing document information and identification information, and the inside area is set as a code information recording area AC for storing document information and identification information. It is set as an image storage area AT for storing image information such as related images, such as drawings added to a document.

The optical disc 1 is driven at a constant angular velocity, and the recording tracks for recording data are arranged spirally or concentrically at a predetermined pitch, and the recording track corresponding to one circumference is divided into eight sectors. It is being

As shown in FIG. 2, one sector has header information H consisting of a sector address, etc. for identifying the sector.
1'l, and a predetermined length (for example, 4 bytes (=10
24. It consists of data DT (byte - 8 bits)).

Further, header information +10 is previously formed on the recording track, and storage and reproduction of data DT is executed while referring to this header information HD.

Now, the data DT in the code storage area AC is.

Search information for identifying document information, search document information Fkd consisting of all or part of the document information, and document information D.
There are two types of Tc, among which search document information Fkd is the third type.
It has the format shown in the figure (,).

In other words, the 1st byte (=8 bits) of the data DT is
Identification information ID is set to indicate the type of information stored in this data DT, and next to it is search information DTk, which consists of a document number, document name, etc., and is referred to when searching for a document. , a sector address ADi indicating the first sector storing image information to be added to the document indicated by this search information DTk, and image size information SZi indicating the length of the image information follow in sequence,
After that, document data DTc, which is the content of the document, is arranged.

The identification information ID also includes, for example, a search document flag F1, which indicates that the stored information is the search document information Fkd shown in FIG.
The document flag F2, which indicates that the stored information is document information DTc, and the image flag F3, which indicates that the stored information is image information DTj, are sequentially set to the first and second bits. and the third bit is set.

In this case, the 4th to 8th bits are invalid information, and if the sector is determined to be a bad sector, a predetermined pattern is written in the identification information TD. Its contents are destroyed. This determination of a bad sector is performed by reading the stored data, comparing the read data with the original data, and determining that the sector is a bad sector if the two are not equal.

By the way, the document data DTc is long and the search document information Fk
If it cannot be stored in d, the other parts should be stored in Figure 3 (c
), the length of the data DT that is one byte shorter than the length of the data DT is sequentially stored in the data DT in consecutive sectors of the search document information Fkd. Note that "double identification information T[" is added to the beginning of this data DTc, and a file end signal EOF is added to the final end of the document information rlTc.
is added to indicate the end of the document.

Further, the storage format of the image information DTi is the signal format shown in FIG. 3(C), similarly to the document information DTc.

However, in this case, the file end signal EOF is not added to the final end of the image information DTi. Note that the end of this image information DTj is determined by counting the length of the image information DTi by the above-mentioned image size information SZj.

FIG. 4 shows an example of an optical disk storage device that uses the optical disk 1 as a storage medium.

In the figure, 11 is a motor that rotates the optical disc 1;
12 is a motor drive unit that drives the motor 11; 13 is an optical pickup consisting of a semiconductor laser, an optical system, a drive system, etc.; 14 is a drive unit that positions and focuses the optical pickup 13 on a recording track; 15 is an optical pickup 13 The servo control section 16 controls the drive section 14 based on the tracking error signal and the focusing error signal output from the optical pickup 13, and the servo control section 16 outputs a recording signal to the optical pickup 13, and inputs and reads out a read signal output from the optical pickup 13. A read/write control unit 17 that discriminates data controls the motor drive unit 12, servo control unit 15, and read/write control unit 16, executes format processing of stored data as described above, and further communicates with the host device 20. It is a controller that exchanges data.

This host device 20 generates document information and image information to be stored on the optical disk 1, and is, for example, an electronic computer system such as a Japanese word processor device.

With the above configuration, when the host device 20 notifies that data will be stored, the controller] 7 first
1, the optical disc 1 is rotated at a constant angular velocity, and the optical pickup 13 is positioned at the innermost side of the storage area of the optical disc 1. After the optical pickup 13 is positioned at the innermost side of the storage area of the optical disc 1, the optical pickup 13 is sequentially moved outward while reading data output from the read/write controller 16. The signal is monitored to determine the first sector of the free area, and the sector address is detected and stored as the first sector address for storing image information.

If an image is added to the document to be stored, the host device 20 notifies the controller 1 of the length of the image.
7 stores the length information.

Thereafter, the host device 20 first sequentially sends the document number, document name, and document information DTc of the document to be stored to the controller 1.
Transfer to 7. After the transfer of the document information DTc is completed, if an image is added to the document, the image information DTi is transferred to the controller 17.

The controller 17 searches for the first sector of the free space in the code information storage area AC, and sets the identification information ID with the search document flag F1 turned on in the first byte of the data in that sector.
After recording, the document number and document name transferred from the host device 20 are recorded in the search information DTk, - the first sector address for image information storage stored as described above is recorded in the sector address ADi, Then, the document information r]Tc transferred from the host device 20 is stored starting from the area immediately following it.

Also, this document information DTc is data D of one sector.
If the remaining document information DTc cannot be stored in T, the remaining document information DTc is sequentially stored in subsequent sectors. In this case, the identification information TD with the document flag F2 turned on is stored in the first byte of the data DT.

When the storage of the document information DTc is finished in this way,
The controller 17 moves the optical pickup 13 to the sector stored at the sector address ADi, and then sequentially stores the image information DTi transferred from the host device 20 from that sector. Note that this image information DTi
The identification information ID with the image flag F3 turned on is stored in the first byte of the data DT of the sector storing the image.

In addition, when storing search document information, document information, and image information in the respective selected sectors as described above, a bad sector detection process is executed for each sector, and sectors determined to be bad are marked with their identification. A predetermined pattern is written in the information TI), and the information stored in that sector is stored in the next sector. Also, controller 1
Data exchange between 7 and the host device 20 is performed according to a predetermined procedure, and for example, if it is detected that an error has occurred in the input data itself, a request is made to resend the same data. It may also include processing.

Further, when reading a document stored on the optical disk l, first, the host device 20 notifies the controller 17 that the document is to be read, and then the document number to be read is notified.

Thereby, the controller 17 once positions the optical pickup 13 at the sector corresponding to the document number of the document to be read, and reads out the data DT of that sector. At that time, if the document flag F2 of the identification information ID is on, the reading of that sector is interrupted, the process moves to the following sector, and the sector where the search document flag F1 of the identification information II) is on is read. Explore. Then, if you find a sector where the search document flag Fl of the identification information ID is on,
The document number is determined from the search information r)Tk of the data DT and compared with the input document number.

As a result of the comparison, if the document numbers match, the search information D
It responds to the host device 20 with the document name of Tk, and also sends the sector address ADi and image size information SZi.
is stored, the document information DTc is read out, and it is transferred to the host device 20.

If the file end signal HOF is not detected when all the document information DTc in the first sector is read, the remaining part of the document information DTc is stored in the subsequent sector, so The contents of the data DT are read and sequentially transferred to the host device 20.

When the reading of the document information DTc is finished in this way, the controller 17 positions the optical pickup 13 at the sector address ADi, if the sector address ADi corresponding to the document is stored, and reads the image size information. The image information DTi corresponding to SZi is read out and transferred to the host device 20.

As described above, data is stored on the optical disc 1, and the stored data is read out.

In the above-described embodiment, the optical disk 1 was driven using a constant angular velocity, but the present invention can be similarly applied to an optical disk whose driving method is a constant linear velocity.

In addition, the track configuration and sector configuration of an optical disk are
It is not limited to the embodiments described above.

[Effect] As explained above, according to the present invention, document information and search information for this document information are stored in the optical disc from the outermost side of the storage area, and the above-mentioned document information is stored in the inner area of the storage area. memorize relevant image information, and
Since the above-mentioned search information includes search information for searching image information, there is an advantage that the storage management of information in the optical disk device can be improved. Additionally, since the search information and document information are stored integrally in a continuous area, the optical disc has the advantage of being more efficient than storing search information alone, which is generally much shorter than the sector length. .

[Brief explanation of drawings]

FIG. 1 is a plan view showing an optical disc according to an embodiment of the present invention, FIG. 2 is a signal arrangement diagram showing an example of the data recording format in a sector, and FIG. 3(a) shows an example of search document information. Figure (1)) is a signal layout diagram showing an example of identification information, Figure (c) is a signal layout diagram showing the storage format of document information and image information, and Figure 4 is a signal layout diagram showing an example of identification information. 1 is a block diagram illustrating an optical disk storage device according to an embodiment; FIG. l...Optical disk, AC...Code information storage area,
AT: Image information storage area.

Claims (1)

[Claims] A code information recording area for recording document information and search information for searching this document information is set in a predetermined range from the outermost area of the storage area of the optical disc, and the other recording areas are related to the document information. The above search information and the above document information are recorded integrally in a continuous recording area, and the above search information is set as index information for searching the above image information. What is claimed is: 1. A storage management method for an optical disc, comprising: