JPH11185449A - Disc recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid disagreement between disc management information stored in a management information memory and disc management memory stored in a disc. SOLUTION: A disc identifying means 22 which detects disc identification information data, a management information detecting means 7 which detects disc management information data, a management information memory means 38 in which a plurality of disc management information data are stored in relation to the respective disc identification information data and a control means 39 which judges whether the disc management information data which are to be referred to are stored in the management information memory means 38 or not in accordance with the detected disc identification information data and, if they are, makes reference to them and, if they are not, reads the management information data in a disc 1 and makes reference to them and stores them in the memory means 38 additionally and, further, if the disc management information data are changed, changes the management information data stored in the memory means 38 and writes the disc management after change into the disc 1 are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording / reproducing apparatus for recording / reproducing data on / from a disk medium such as a magneto-optical disk, and more particularly, to reducing a waiting time when recording / reproducing data. The present invention relates to a disk recording / reproducing apparatus capable of performing the above-mentioned operations.

[0002]

2. Description of the Related Art In a conventional disk recording / reproducing apparatus of this type, a plurality of tracks are formed in a radial direction of a disk, and recording / reproducing is performed in sector units in which a track is divided into a plurality of blocks. . When performing random access, which is a feature of the disk, in order to perform recording and playback of distant sectors, an access time such as a seek involving movement of the pickup head to another track and a rotation wait between sectors on the same track is required. Become.

[0003] In particular, when performing a seek, a large amount of time is required for mechanical movement, and frequent seeks cause a reduction in the data write / read speed of the entire disk recording / reproducing apparatus.

In recent disk recording / reproducing apparatuses, many techniques using a cache memory have been studied as a technique for increasing the access speed when performing recording / reproducing. The basic idea of this technology is to store the data read from the disk during playback in the cache memory, and then read the data from the cache memory without reading from the disk the next time the same sector is read. This eliminates the need for access time.

[0005] Further, when writing, once writing to the cache memory is performed, and then when the same sector is written, it is only necessary to overwrite the cache memory. To reduce unnecessary access.

In particular, since the information management section on the disk is frequently referred to, an apparatus has been proposed which has a cache memory for the management information section separately from the data storage section and improves the read / write speed of the management information section. (Japanese Unexamined Patent Publication No. 8-3146)
No. 39).

FIG. 11 shows a disk recording / reproducing apparatus having a memory means for storing such disk management information.
And FIG. Here, FIG. 11 is a block diagram showing a circuit configuration of a conventional disk recording / reproducing apparatus, and FIG. 12 is an explanatory diagram showing the contents of a conventional disk.

First, FIG. 12 shows the inner circumference of the disk, or
An example of the type of sector contents with respect to sector addresses sequentially numbered for each sector from the outer periphery is shown. The sector contents of the disk include a disk management area for managing data contents of the disk and a data area in which data is recorded. The disk management area is a file containing defect management information indicating the state of a defective portion of the disk, a volume indicating how the disk is divided and used, a directory for handling data as a file, a file name and other management information. It consists of entries and the like. on the other hand,
The data area includes video management data, video data, text data, code data, and the like.

In the block diagram shown in FIG. 11, a disk 1 is rotated by a spindle motor 2 controlled by a servo control circuit 6. The read head / write head 3 is controlled by a servo control circuit 6 and seeks to a target track on the disk 1. In the case of reproduction, a signal reproduced from the disk 1 is output to a reproduction signal processing circuit 4, and digital data Detection is performed. In the case of recording, digital data is converted into a signal for recording by the recording signal processing circuit 10 and recorded on the disk 1.

The disc management information area of the digital data detected by the reproduction signal processing circuit 4 is detected by the management information detection circuit 7 and output to the management information memory 8 and the control circuit 9. On the other hand, the data area is output by the reproduction data output circuit 5. The management information memory 8 stores the read disk management information during reproduction and outputs the stored disk management information to the control circuit 9 in accordance with an instruction from the control circuit 9. At the time of recording, the disc management information is changed according to the instruction of the control circuit 9 and output to the recording signal processing circuit 10. The recording signal processing circuit 10 inputs disk management information from the management information memory 8 and data to be recorded in the data area from the recording data input circuit 11 and outputs the data to the read / write head 3.

The operation of the above configuration will be described. When the disc 1 is inserted, the control circuit 9 instructs the servo control circuit 6 on the sector in which the defect management information is stored in order to recognize the defect information of the disc 1. The read / write head 3 is sought to the target sector position, and the read signal is input to the control circuit 9 and stored in the management information memory 8 at the same time.

At the time of reproduction, the control circuit 9 instructs the servo control circuit 6 on the sector storing the volume information of the disk management area in order to find the sector address where the data to be reproduced is recorded. The read / write head 3 is sought to the target sector position, and the read signal is input to the control circuit 9 and stored in the management information memory 8 at the same time.

The control circuit 9 recognizes the sector in which the information of the file entry is stored from the input volume information, and instructs the servo control circuit 6. Similarly, the read signal is input to the control circuit 9 and stored in the management information memory 8 at the same time. If necessary, the control circuit 9 reads a sector in which information of a plurality of file entries is stored until file information indicating target data is found. The sector in which the target data is recorded is instructed to the servo control circuit 6 based on the found file information, the data is read, and the read data is output from the reproduction data output circuit 5. The output data is subjected to data cache processing in some cases.

Next, when there is a request for reproducing other data, the control circuit 9 reads the volume information and the file entry information already stored in the management information memory 8 and finds the file information for reading the data. Here, if necessary, information of another file entry is read from the disk 1 and information is added to the management information memory 8. The sector in which the target data is recorded is instructed to the servo control circuit 6 based on the found file information, the data is read, and the read data is output from the reproduction data output circuit 5.

As described above, the reading of each sector of the disk management information from the disk 1 is performed only once when the sector is not stored in the management information memory 8, and the subsequent reading is performed from the management information memory 8. Therefore, it is possible to shorten the access time by reading the frequently needed disk management information.

On the other hand, at the time of recording, the control circuit 9 obtains the sector position where the recording data is to be written from the management information memory 8, instructs the servo control circuit 6, and transmits the data from the recording data input circuit 11 through the recording signal processing circuit 10. Disc 1
Write to. In addition, the control circuit 9 corrects the information of the file entry stored in the management information memory 8 which is changed by the recording of the data.

Next, when there is a request for recording other data, the data is similarly written on the disk 1, and
The file entry information stored in the management information memory 8 is corrected.

The information of the corrected file entry in the management information memory 8 indicates that when the corrected portion exceeds a certain number,
Alternatively, when the disc 1 is ejected, the data is read from the management information memory 8 and written to the target sector through the recording signal processing circuit 10 according to the instruction of the control circuit 9. Similarly, writing is performed also on the portions where the defect management information and the volume information have been changed.

As described above, the disk management information at the time of data recording is not written to the disk 1 each time, but only the contents stored in the management information memory 8 need be corrected. The access time by writing the disc management information can be shortened.

However, in the above-described disc recording / reproducing apparatus, when the disc 1 is ejected and replaced, the contents of the management information memory 8 become invalid, and when the disc 1 is inserted, even if the same disc is inserted, the disc management information is not stored again. It was necessary to read data and store it in the management information memory 8.

As a method for solving this problem, there is provided a means for identifying a disk and a memory means for storing management information of a plurality of disks, and when reading a disk that has been reproduced once, the management information is stored in the memory means. There has been proposed a disk reproducing apparatus for shortening an access time by reading from a disk (Japanese Patent Laid-Open No. 9-82035).

A disc reproducing apparatus having such a disc identifying means and a memory means for storing management information of a plurality of discs will be described with reference to FIGS. Here, FIG. 13 is a block diagram showing a circuit configuration of a conventional disk reproducing device, FIG. 14 is an explanatory diagram showing the contents of a conventional disk, and FIG. 15 is an explanatory diagram showing the contents of a management information memory in the conventional disk reproducing device. It is.

First, FIG. 14 shows the inner circumference of the disk, or
An example of the type of sector contents with respect to sector addresses sequentially numbered for each sector from the outer periphery is shown. The sector contents of the disk include a disk identification number for distinguishing each disk, a disk management area for managing data contents of the disk, and a data area in which data is recorded.

In the block diagram shown in FIG. 13, the disk 1 is rotated by a spindle motor 2 controlled by a servo control circuit 6. The read head 21 is controlled by the servo control circuit 6, seeks a target track on the disk 1, outputs a signal reproduced from the disk 1 to the reproduction signal processing circuit 4, and detects digital data.

The disc management information of the digital data detected by the reproduction signal processing circuit 4 is transmitted to the management information detection circuit 7
Detected by the management information memory 28 and the control circuit 2
9 is output. The disk identification information is detected by the disk identification circuit 22 and output to the control circuit 29. On the other hand, the data area is output by the reproduction data output circuit 5. The management information memory 28 has a function of storing disk management information of a plurality of disks.
According to the instruction of No. 9, the read disk management information is stored in association with the disk identification number as shown in FIG.

The operation of the above configuration will be described. When the disc 1 is inserted, the control circuit 29 controls the servo control circuit 6
To read the disk identification number. The reproduction signal of the disk identification number read by the read head 21 is converted into digital data by the reproduction signal processing circuit 4, and the disk identification number is detected by the disk identification circuit 22. The detected disk identification number is input to the control circuit 29. The control circuit 29 reads data from the management information memory 28 and determines whether there is disk management information corresponding to the detected disk identification number.

At the time of data reproduction, if disk management information such as volume and file entry does not exist in the management information memory 28, the control circuit 29 instructs the servo control circuit 6 to read the disk management information. The read and detected disk management information is in accordance with an instruction from the control circuit 29,
The information is stored in the management information memory 28 in association with the disk identification number.

When the disk management information exists in the management information memory 28, the control circuit 29 reads out the disk management information associated with the corresponding disk identification number from the management information memory 28, and determines the sector in which the target data is recorded. Refer to and read data.

As a result, even when the disc 1 is ejected, the disc management information is stored in the management information memory 28. Therefore, when a previously reproduced disc is inserted, the disc is discriminated by the disc identification number. By reading the disk management information from the management information memory 28,
It is not necessary to read out the disk management information from the disk 1 again, so that the number of accesses to the disk 1 at the time of data reproduction can be reduced and the speed up to reading out the target data can be realized.

[0030]

However, by storing the above-mentioned conventional disk management information of a plurality of disks,
The technology for increasing the read speed at the time of reproduction targets a reproduction-only disk and presupposes that the contents of the disk cannot be rewritten.

For this reason, when data is recorded on a recordable / reproducible disc, the disc management information is rewritten accordingly, and in the prior art, the disc management information stored in the management information memory and the disc management information are rewritten. There is a problem that the disc management information does not coincide with the disc management information and the reproduction process cannot be performed correctly.

In the case of a recordable / reproducible disc, there is a possibility that rewriting is performed by another recording / reproducing apparatus. There is a problem that the disc management information stored in the memory does not match the disc management information in the disc, so that the reproduction process cannot be performed correctly.

The present invention has been made in view of the above points, and even in a recording / reproducing apparatus in which rewriting is performed, disk management information stored in a management information memory and disk management information in a disk are The object of the present invention is to provide a disk recording / reproducing apparatus capable of preventing occurrence of discrepancies in data, reducing the number of times of access to the disk during data recording / reproduction, and realizing high speed until reading out target data. And

[0034]

According to a first aspect of the present invention, there is provided a disk recording / reproducing apparatus for detecting disk identification information for identifying a disk medium, and the disk identification information is recorded on the disk medium. Management information detection means for detecting disk management information; management information memory means for storing a plurality of disk management information in association with each disk identification information; and reference information based on the disk identification information detected by the disk identification means. Discriminating means for discriminating whether or not disk management information requiring reference is stored in the management information memory means; and, when disk management information requiring reference is stored in the management information memory means, When the disk management information is not stored in the management information memory means, the disk management information is referred to. Reference means for reading and referencing the disk management information recorded on the disk medium, and adding the disk management information to the management information memory means when the disk management information requiring reference is not stored in the management information memory means. Means for storing, and when the disk management information is changed, means for changing the disk management information stored in the management information memory means and writing the changed disk management information to a disk medium. Things.

Thus, when the disk management information that needs to be referred to is stored in the management information memory means, the disk management information can be read from the disk by referring to the disk management information in the management information memory means. It is possible to reduce the number of accesses to the disk and to realize a high speed until recording and reproducing the target data.

When the disk management information which needs to be referred to is not stored in the management information memory means, the disk management information is additionally stored in the management information memory means. , It becomes unnecessary to access the disc, and it is possible to realize high-speed recording and reproduction processing.

Further, even when the disk management information is rewritten, the rewritten disk management information is stored in the management information memory means in association with the disk identification information. It is possible to prevent inconsistency with the disc management information in the disc and realize a normal reproduction operation.

A disk recording / reproducing apparatus according to a second aspect of the present invention includes a disk identification unit for detecting disk identification information for identifying a disk medium and a disk management information recorded on the disk medium. Management information detection means, management information memory means for storing a plurality of disk management information in association with each disk identification information, disk update identification means for detecting update information indicating an update of the disk management information, and said disk identification means Discriminating means for discriminating whether or not disk management information requiring reference is stored in the management information memory means based on the disk identification information detected by When the disk management information is not updated, the management information memory means Reference means for referring to the stored disk management information and reading and referring to the disk management information recorded on the disk medium when the disk management information is not stored in the management information memory means or when the disk management information is updated. A means for additionally storing the disk management information in the management information memory means when the disk management information requiring reference is not stored in the management information memory means; and a means for storing the disk management information when the disk management information is updated. Means for correcting the disk management information stored in the information memory means; and, when the disk management information is changed, changing the disk management information stored in the management information memory means and changing the disk management information. Means for writing information and update information of disk management information to a disk medium. It is.

Thus, even if the disc management information is rewritten by another disc recording / reproducing apparatus, the disc management information is recognized by the update information, the disc management information is read from the disc and referred to, and stored in the management information memory means. Since the disc management information stored in the disc is corrected, discrepancy between disc management information stored in the management information memory means and disc management information in the disc can be prevented, and a normal reproduction operation can be realized.

A disk recording / reproducing apparatus according to a third aspect of the present invention includes a disk identification unit for detecting disk identification information for identifying a disk medium and a disk management information recorded on the disk medium. Management information detection means, management information memory means for storing a plurality of disc management information in association with each disc identification information, transmission means for notifying the disc management information to another disc recording / playback device, and other disc recording / playback Receiving means for receiving disk management information from the device, based on the disk identification information detected by the disk identification means,
Determining means for determining whether the disk management information requiring reference is stored in the management information memory means; and determining whether the disk management information requiring reference is stored in the management information memory means. Reference means for referring to the disk management information stored in the memory means, and when not stored in the management information memory means, for reading and referring to the disk management information recorded on the disk medium; When the management information is not stored in the management information memory means, the disk management information is additionally stored in the management information memory means, and the disk management information and the disk identification information are output by the transmission means in association with each other. When the information is changed, the disk management information stored in the management information memory means is changed. The information is changed, the changed disk management information is written to the disk medium, and the disk management information is associated with the disk identification information, output by the transmission unit, and the disk management information received by the reception unit. Means for additionally storing the disk management information in the management information memory means or for correcting the disk management information stored in the management information memory means.

Thus, when the disk management information requiring reference is not stored in the management information memory means or when the disk management information is changed, the disk management information and the disk identification information are output from the transmission means in association with each other. When the receiving means receives the information of addition / modification of the disc management information, the content of the management information memory means is added / modified based on the disc management information. The disk management information stored in the management information memory means can always be matched with the disk management information in the disk.

Therefore, even when a disk is inserted into any disk recording / reproducing apparatus, by reading the disk management information from the management information memory means, access to the disk becomes unnecessary, and the speed of the recording / reproducing process can be increased. It becomes possible.

According to a fourth aspect of the present invention, there is provided a disk recording / reproducing apparatus according to any one of the first to third aspects, wherein the management information memory means corresponds to the disk management information. The data is stored including a part of the data area.

Thus, for example, by storing frequently referenced data in the management information memory means, it is possible to reduce the time required for access by an application that frequently accesses the same data.

According to a fifth aspect of the present invention, there is provided a disk recording / reproducing apparatus according to any one of the first to fourth aspects, wherein the disc identification means is recorded in a recording / reproducing area of a disk medium. It reproduces and detects a non-rewritable disc-specific number.

As a result, the disc identification information is not erroneously rewritten, so that the disc can be surely distinguished, and the disc management information stored in the management information memory means is prevented from being inconsistent. High-speed recording / reproducing processing of the data area can be realized.

According to a sixth aspect of the present invention, there is provided a disk recording / reproducing apparatus according to any one of the first to fourth aspects, wherein the disc identification means is added to a portion other than the recording / reproducing area of the disk medium. It reads and detects the unique number of the disc.

As a result, the disc identification information is a disc-specific number added to the area other than the recording / reproducing area of the disk medium. Therefore, when detecting the disc identifying information, it is necessary to read from the recording / reproducing area of the disc. Can be eliminated, and the access time due to seek or the like can be eliminated.

According to a seventh aspect of the present invention, there is provided the disk recording / reproducing apparatus according to the first to sixth aspects, wherein the management information memory means is a nonvolatile memory. It is.

As a result, even when the power supply to the apparatus is stopped, the contents stored in the management information memory means are retained, so that it is possible to read out from the management information memory means after the power is restored. The time required for access in data recording and reproduction can be reduced.

[0051]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a disk recording / reproducing apparatus according to the present invention will be described below with reference to FIGS. 1 and 2.
The description is omitted. Here, FIG. 1 is a block diagram showing a schematic configuration of the disk recording / reproducing apparatus of the present embodiment, and FIG. 2 is an explanatory diagram showing storage contents of a management information memory in the disk recording / reproducing apparatus of the present embodiment.

As shown in FIG. 1, the disk recording / reproducing apparatus according to the present embodiment, when the disk management information is changed at the time of recording based on the disk identification information detected by the disk identification circuit 22, By correcting the contents of the disk management information stored in the memory 38 and writing the changed disk management information to the disk 1, the disk management information stored in the management information memory 38 and the disk in the disk 1 are read. It is possible to prevent inconsistency with management information.

In FIG. 1, when the disk 1 is inserted, the control circuit 39 instructs the servo control circuit 6 to read the disk identification number. Read / write head 3
The disk identification number thus read is detected by the disk identification circuit 22 and input to the control circuit 39. The control circuit 39 reads data from the management information memory 38,
It is determined whether there is disk management information corresponding to the detected disk identification number.

When the corresponding disk management information exists in the management information memory 38, the control circuit 39 reads the disk management information from the management information memory 38. On the other hand, if the corresponding disk management information does not exist in the management information memory 38, the control circuit 39 instructs the servo control circuit 6 to read the disk management information. Read / write head 3
The read disk management information is detected by the management information detection circuit 7 and in accordance with an instruction from the control circuit 38, the disk management information shown in FIG.
As shown in the figure, the information is stored in the management information memory 38 together with the disk identification number.

Thus, the reading of the disc management information at the time of the subsequent data recording / reproduction is performed in the management information memory 3.
8, the access to the disk 1 for reading the disk management information becomes unnecessary.

In the case of recording, the control circuit 39 changes the disc management information corresponding to the disc identification number in the management information memory 38 according to the recorded data. Further, when the disk management information in the management information memory 38 is changed when the disk 1 is ejected, the control circuit 39 instructs the servo control circuit 6 to write the changed disk management information to the sector address. Then, the changed disk management information is output from the management information memory 38 to the read / write head 3 through the recording signal processing circuit 10 and recorded on the disk 1.

As described above, in the disk recording / reproducing apparatus of this embodiment, even when the disk management information is rewritten, the rewritten disk management information is stored in the management information memory 38 in association with the disk identification information. The disc management information stored in the management information memory 38 can be prevented from being inconsistent with the disc management information in the disc 1, and a normal reproduction operation can be realized.

A second embodiment of the disk recording / reproducing apparatus according to the present invention will be described below with reference to FIGS. 3 to 5. The same reference numerals are given to the same parts as those in the conventional example, and the description is omitted. Here, FIG. 3 is a block diagram showing a schematic configuration of the disk recording / reproducing apparatus of this embodiment, FIG. 4 is an explanatory diagram showing the contents of a disk sector used in the disk recording / reproducing apparatus of this embodiment, and FIG. FIG. 4 is an explanatory diagram showing storage contents of a management information memory in the disc recording / reproducing apparatus of FIG.

The disc recording / reproducing apparatus according to the present embodiment adds a disc update identification circuit 41 and a disc update information adding circuit 45 as shown in FIG. 3 and, as shown in FIG. The management information update date and time data is recorded. When the disk 1 is inserted, the disk management information update date and time data is detected by the disk update identification circuit 41, and it is determined whether or not the update has been performed. The disk management information is rewritten by another recording / reproducing apparatus. In this case, the disc management information is read from the disc 1 and stored in the management information memory 48, thereby preventing discrepancies between the disc management information stored in the management information memory 48 and the disc management information in the disc 1. Is possible.

In FIG. 3, when the disk 1 is inserted, the control circuit 49 instructs the servo control circuit 6 to read the disk identification number. Read / write head 3
The read disk identification number is detected by the disk identification circuit 22 and input to the control circuit 49. The control circuit 49 reads data from the management information memory 48,
It is determined whether there is disk management information corresponding to the detected disk identification number.

When the corresponding disk management information does not exist in the management information memory 48, the control circuit 49 instructs the servo control circuit 6 to read the disk management information. The disk management information read by the read / write head 3 is detected by the management information detection circuit 7 and, in accordance with an instruction from the control circuit 49, as shown in FIG. Is stored in the management information memory 48 together with the date and time information.

If the corresponding disk management information exists in the management information memory 48, the control circuit 49 instructs the servo control circuit 6 to read the disk update date and time information. The disk update date and time information read by the read / write head 3 is detected by the disk update identification circuit 41 through the reproduction signal processing circuit 4 and input to the control circuit 49.
The control circuit 49 reads the management information memory update date / time information corresponding to the disk identification number from the management information memory 48, and compares it with the disk update date / time information detected by the disk update identification circuit 41.

If the disk update date and time information detected by the disk update identification circuit 41 is newer, the control circuit 49
Instructs the servo control circuit 6 to read the disk management information. The disc management information read by the read / write head 3 is detected by a management information detection circuit 7,
According to the instruction from the control circuit 49, the old management information memory update date / time information and the disk management information corresponding to the disk identification number are overwritten with the new management information memory update date / time information and the disk management information and stored in the management information memory 48. .

If the management information memory update date and time information read from the management information memory 48 is newer, the management information memory 48 is not updated, and the disk management information is referred to from the management information memory 48. As a result, the disk management information is read from the management information memory 48 at the time of subsequent data recording / reproduction, so that access to the disk 1 for reading the disk management information becomes unnecessary.

In the case of recording, the control circuit 49 changes the disc management information corresponding to the disc identification number in the management information memory 48 according to the recorded data. Further, when the disk management information in the management information memory 48 is changed when the disk 1 is ejected, the control circuit 49 instructs the servo control circuit 6 to write the changed disk management information to the sector address. Then, the changed disk management information is output from the management information memory 48 to the read / write head 3 through the recording signal processing circuit 10 and recorded on the disk 1.

Subsequently, the control circuit 49 controls the servo control circuit 6
To write the disk update date / time information to the sector address. The update date / time information is output from the disk update information adding circuit 45 to the read / write head 3 through the recording signal processing circuit 10 and recorded on the disk 1. Also, the management information memory update date / time information corresponding to the disk identification number in the management information memory 48 is corrected.

As described above, in the disk recording / reproducing apparatus of the present embodiment, even if the disk management information is rewritten by another disk recording / reproducing apparatus, it is recognized by the disk update date / time information, In order to read and refer to the management information and to correct the disk management information stored in the management information memory 48, the disk management information stored in the management information memory 48 is compared with the disk management information in the disk 1. A mismatch can be prevented, and a normal reproduction operation can be realized.

Further, a third embodiment of the disk recording / reproducing apparatus of the present invention will be described below with reference to FIGS. 6 and 7, and the same parts as those in the above-mentioned conventional example will be denoted by the same reference numerals and description thereof will be omitted. Here, FIG. 6 is a block diagram showing a schematic configuration of the disk recording / reproducing apparatus of the present embodiment, and FIG. 7 is an explanatory diagram showing a connection relationship between the disk recording / reproducing apparatus of the present embodiment and another disk recording / reproducing apparatus. .

The disk recording / reproducing apparatus of this embodiment further includes a management information communication input / output circuit 53 as shown in FIG. 6 and, as shown in FIG. , The change of the disc management information is notified to other recording / reproducing apparatuses, and the disc recording / reproducing apparatus which has received the update information stores the management information memory 5
8, it is possible to prevent the disc management information stored in the management information memory 58 from being inconsistent with the disc management information in the disc 1.

In FIG. 6, when the disk 1 is inserted, the control circuit 59 instructs the servo control circuit 6 to read the disk identification number. Read / write head 3
The read disk identification number is detected by the disk identification circuit 22 and input to the control circuit 59. The control circuit 59 reads data from the management information memory 58,
It is determined whether there is disk management information corresponding to the detected disk identification number.

When the corresponding management information does not exist in the management information memory 58, the control circuit 59 instructs the servo control circuit 6 to read the management information. The disk management information read by the read / write head 3 is detected by the management information detection circuit 7 and, in accordance with an instruction from the control circuit 59,
The information is stored in the management information memory 58 together with the disk identification number.

The control circuit 59 outputs a disk identification number and disk management information to another disk recording / reproducing device through the management information communication input / output circuit 53. here,
As a method of connecting to another disk recording / reproducing device, a method of connecting between the two devices is also conceivable. However, as shown in FIG. Information can be notified to the device at the same time.

In FIG. 6, for example, data is output from the disk recording / reproducing apparatus A to the disk recording / reproducing apparatuses B and C. In the received disk recording / reproducing apparatuses B and C, the disk identification number and the disk management information are input from the management information communication input / output circuit 53, and are stored in the management information memory 58 by the control circuit 59.

Thus, the management information memory 5 of each of the disk recording / reproducing apparatuses A, B, and C connected via the network
8 are equal. Thereafter, even when the disk 1 is inserted into another disk recording / reproducing apparatus, the disk management information is read from the management information memory 58, so that access to the disk 1 for reading the disk management information becomes unnecessary.

In the case of recording, the sector address of the data to be recorded is obtained from the disk management information, and the control circuit 59 instructs the servo control circuit 6 to write the recording data to the target sector address. The recording data input from the recording data input circuit 11 is output to the read / write head 3 through the recording signal processing circuit 10 and recorded on the disk 1. Further, the control circuit 59
Changes the disk management information corresponding to the disk identification number in the management information memory 58 in accordance with the recorded data.

When the disc 1 is ejected, the management information memory 58
When there is a change in the disk management information, the control circuit 59 instructs the servo control circuit 6 to write the changed disk management information to the sector address. The disc management information is transferred from the management information memory 58 to the recording signal processing circuit 1.
0 is output to the read / write head 3 and recorded on the disk 1. Further, the control circuit 59 outputs the disc identification number and the changed data of the disc management information to another recording / reproducing apparatus connected via a network or the like through the management information communication input / output circuit 53. The disk recording / reproducing apparatus receives the data from the management information communication input / output circuit 53, and changes the disk management information stored in the management information memory 58 by the control circuit 59.

As described above, in the disk recording / reproducing apparatus of this embodiment, when the disk management information that needs to be referred to is not stored in the management information memory 58 or when the disk management information is changed, The information and the disk identification information are output from the management information communication input / output circuit 53 in association with each other.
When the information of addition / correction of the disk management information is received, the content of the management information memory 58 is added / corrected based on the disk management information. Therefore, the disk management information is rewritten by another disk recording / reproducing device. In this case, the disk management information stored in the management information memory 58 and the disk management information in the disk 1 can always be matched.

Next, according to the first embodiment of the present invention, the access speed of the data part is improved by providing the storage part of the data area in the disk management area of the management information memory 38 according to the present invention. A fourth embodiment of the disc recording / reproducing apparatus will be described below with reference to FIG. 8, but the same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted. Here, FIG. 8 is an explanatory diagram showing the storage contents of the management information memory in the disk recording / reproducing apparatus of the present embodiment.

In the disk recording / reproducing apparatus of this embodiment, the storage management information detection circuit 7 also detects the disk management information of the data which is known to be frequently accessed in advance in the data area. As shown,
The data is stored in the storage area of the data area provided in the disk management area of the management information memory, and the next reading is performed from the management information memory so that the access speed of the data section can be improved.

Thus, for example, by storing frequently referenced data in the management information memory, it is possible to reduce the time required for access by an application that frequently accesses the same data. still,
In the second and third embodiments of the present invention as well, it goes without saying that the management information memories 48 and 58 may be provided with a storage part of the data area to improve the access speed of the data part.

In the first to fourth embodiments of the present invention, the disc identification number is a unique number of a non-rewritable disc recorded in the recording / reproducing area, so that discs can be reliably distinguished. This will be described below with reference to FIG. 9 as a fifth embodiment of the disk recording / reproducing apparatus of the present invention. Here, FIG. 9 is an explanatory diagram showing the contents of a disk sector used in the disk recording / reproducing apparatus of the present embodiment.

In the disk recording / reproducing apparatus of this embodiment, as shown in FIG. 9, the disk identification number is a unique number of a non-rewritable disk recorded in the recording / reproducing area of the disk 1, and reading is possible but writing is possible. Therefore, it is possible to prevent the disc identification information from being erroneously rewritten, and to reliably discriminate the disc. Therefore, it is possible to prevent the disc management information stored in the management information memory from causing inconsistency, and to realize a high-speed recording / reproducing process of the data area.

A sixth embodiment of the disk recording / reproducing apparatus of the present invention will be described below with reference to FIG. 10. The same parts as those of the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Here, FIG. 10 is a block diagram showing a schematic configuration of the disk recording / reproducing apparatus of the present embodiment.

As shown in FIG. 10, the disc recording / reproducing apparatus of this embodiment adds a disc-specific number as disc identification information to the area other than the recording / reproduction area of the disc 1, and assigns the disc-specific number to the disc identification information. The information is detected by the information reading unit 61 and is detected by the disk identification circuit 22 as disk identification information.

As a result, an operation for reading data from the recording / reproducing area of the disk 1 is not required, so that an access time due to seek or the like can be eliminated. here,
As an example of the disc-specific number added to the area other than the recording / reproducing area of the disc 1, bar code information or the like printed on a label on the disc surface can be considered.

In the embodiment of the present invention, since the management information memory is a non-volatile memory, the contents of the management information memory are retained even when the power supply is interrupted. After that, reading from the management information memory can be similarly performed, and the time required for access in data recording and reproduction can be reduced.

[0087]

Since the disk recording / reproducing apparatus according to the first aspect of the present invention has the above-described configuration, when the disk management information that needs to be referred to is stored in the management information memory means, By referring to the disk management information in the management information memory means, it is possible to minimize the reading of the disk management information from the disk, reduce access to the disk, and speed up the recording and reproduction of the target data. Can be realized.

When the disk management information which needs to be referred to is not stored in the management information memory means, this disk management information is additionally stored in the management information memory means. , It becomes unnecessary to access the disc, and it is possible to realize high-speed recording and reproduction processing.

Further, even when the disk management information is rewritten, the rewritten disk management information is stored in the management information memory means in association with the disk identification information. It is possible to prevent inconsistency with the disc management information in the disc and realize a normal reproduction operation.

The disc recording / reproducing apparatus according to the second aspect of the present invention recognizes the disc management information by the update information even if the disc management information is rewritten by another disc recording / reproducing apparatus, and reads the disc management information from the disc. Since the disk management information stored in the management information memory means is read and referenced and the disk management information stored in the management information memory means is corrected, discrepancy between the disk management information stored in the management information memory means and the disk management information in the disk is prevented. , A normal reproduction operation can be realized.

The disk recording / reproducing apparatus according to the third aspect of the present invention provides a disk recording / reproducing apparatus that stores disk management information that is not required to be referred to in the management information memory means or that changes the disk management information. The information and the disc identification information are output from the transmitting means in association with each other. When the receiving means receives the information on addition / modification of the disc management information, the contents of the management information memory means are added based on the disc management information. Since the correction is performed, even when the disk management information is rewritten by another disk recording / reproducing apparatus, the disk management information stored in the management information memory means and the disk management information in the disk can always be matched. .

Therefore, even when a disk is inserted into any disk recording / reproducing apparatus, by reading the disk management information from the management information memory means, access to the disk becomes unnecessary, and the speed of the recording / reproduction processing can be increased. It becomes possible.

In the disk recording / reproducing apparatus according to the present invention, for example, by storing frequently referenced data in the management information memory means, an access by an application which frequently accesses the same data is performed. Can be shortened.

In the disk recording / reproducing apparatus according to the fifth aspect of the present invention, since the disk identification information is not erroneously rewritten, the disk can be surely distinguished and stored in the management information memory means. It is possible to prevent inconsistency from occurring in the disc management information, and to speed up the recording / reproducing processing of the data area.

In the disk recording / reproducing apparatus according to the sixth aspect of the present invention, the disk identification information is a unique number of the disk added to the area other than the recording / reproduction area of the disk medium. In addition, there is no need to read data from the recording / reproducing area of the disk, and access time due to seek or the like can be eliminated.

In the disk recording / reproducing apparatus according to the seventh aspect of the present invention, even when the power supply to the apparatus is stopped, the content stored in the management information memory means is retained.
After the power is restored, reading from the management information memory means can be performed, and the time required for access in data recording and reproduction can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a first embodiment of a disk recording / reproducing apparatus of the present invention.

FIG. 2 is an explanatory diagram showing storage contents of a management information memory in the first embodiment of the disk recording / reproducing apparatus of the present invention.

FIG. 3 is a block diagram showing a schematic configuration of a second embodiment of the disk recording / reproducing apparatus of the present invention.

FIG. 4 is an explanatory diagram showing sector contents of a disk used in a second embodiment of the disk recording / reproducing apparatus of the present invention.

FIG. 5 is an explanatory diagram showing storage contents of a management information memory in a second embodiment of the disk recording / reproducing apparatus of the present invention.

FIG. 6 is a block diagram showing a schematic configuration of a third embodiment of the disk recording / reproducing apparatus of the present invention.

FIG. 7 is an explanatory diagram showing a connection relationship with another disk recording / reproducing device in a third embodiment of the disk recording / reproducing device of the present invention.

FIG. 8 is an explanatory diagram showing storage contents of a management information memory in a fourth embodiment of the disk recording / reproducing apparatus of the present invention.

FIG. 9 is a diagram showing sector contents of a disk used in a disk recording and reproducing apparatus according to a fifth embodiment of the present invention.

FIG. 10 is a block diagram showing a schematic configuration of a sixth embodiment of the disk recording / reproducing apparatus of the present invention.

FIG. 11 is a block diagram showing a circuit configuration of a conventional disk recording / reproducing apparatus.

FIG. 12 is an explanatory diagram showing the contents of a disk used in a conventional disk recording / reproducing device.

FIG. 13 is a block diagram showing a circuit configuration of a conventional disk reproducing apparatus.

FIG. 14 is an explanatory diagram showing the contents of a disc used in a conventional disc reproducing apparatus.

FIG. 15 is an explanatory diagram showing storage contents of a management information memory in a conventional disk reproducing device.

[Explanation of symbols]

 Reference Signs List 1 disc 2 spindle motor 3 read / write head 4 reproduction signal processing circuit 5 reproduction data output circuit 6 servo control circuit 7 management information detection circuit 10 recording signal processing circuit 11 recording data input circuit 22 disk identification circuit 38, 48, 58 management information Memory 39, 49, 59 Control circuit 41 Disk update identification circuit 45 Disk update information addition circuit 53 Management information communication input / output circuit 61 Disk identification information reading unit

Claims (7)

[Claims] 1. A disk recording / reproducing apparatus for recording / reproducing data on / from a disk medium, comprising: disk identification means for detecting disk identification information for identifying the disk medium; and disk management information recorded on the disk medium. Management information detecting means for detecting a plurality of disk management information in association with each disk identification information, and a management information memory means for storing a plurality of disk management information in association with each disk identification information. Discriminating means for discriminating whether or not disk management information to be referred to is stored in the management information memory means; Refers to the disk management information stored in the Reference means for reading and referring to disk management information recorded on a disk medium; and when disk management information requiring reference is not stored in the management information memory means, the disk management information is stored in the management information memory means. Means for additionally storing, and means for, when the disk management information is changed, changing the disk management information stored in the management information memory means and writing the changed disk management information to a disk medium. A disk recording / reproducing apparatus characterized by the above-mentioned. 2. A disk recording / reproducing apparatus for recording / reproducing data on / from a disk medium, comprising: disk identification means for detecting disk identification information for identifying the disk medium; and disk management information recorded on the disk medium. Management information detecting means for detecting the disc management information; management information memory means for storing a plurality of disc management information in association with each disc identification information; disc update discriminating means for detecting update information indicating an update of the disc management information; Determining means for determining whether or not disk management information requiring reference is stored in the management information memory means based on the disk identification information detected by the disk identification means; When the disk management information stored in the management information memory means has not been updated When the disc management information is not stored in the management information memory means or when the disc management information is updated, the disc management information recorded on the disc medium is referred to by referring to the disc management information stored in the management information memory means. Means for reading and referencing the disk management information; means for additionally storing the disk management information in the management information memory means when the disk management information requiring reference is not stored in the management information memory means; Means for correcting the disk management information stored in the management information memory means when updated, and changing the disk management information stored in the management information memory means when the disk management information is changed. Write the changed disk management information and the updated information of the disk management information to the disk medium. Disk recording and reproducing apparatus characterized in that a free section. 3. A disk recording / reproducing apparatus for recording / reproducing data on / from a disk medium, comprising: disk identification means for detecting disk identification information for identifying the disk medium; and disk management information recorded on the disk medium. Management information detecting means for detecting the disc management information; management information memory means for storing a plurality of disc management information in association with each disc identification information; transmitting means for notifying the disc management information to another disc recording / reproducing device; Receiving means for receiving the disc management information from the disc recording / reproducing device; and, based on the disc identification information detected by the disc identification means, whether disc management information requiring reference is stored in the management information memory means. Discrimination means for discriminating disk management information that needs to be referred to is stored in a management information memory When the information is stored in the column, the disk management information stored in the management information memory is referred to. When the information is not stored in the management information memory, the disk management information recorded in the disk medium is read and referred to. When the disk management information that requires reference is not stored in the management information memory, the disk management information is additionally stored in the management information memory, and the disk management information is associated with the disk identification information. Means for outputting by the transmitting means, and when the disk management information is changed, the disk management information stored in the management information memory means is changed, and the changed disk management information is written to the disk medium. The disk management information is associated with the disk identification information and output by the transmitting means. Means, based on the disk management information received by the receiving means, for additionally storing the disk management information in the management information memory means, or for correcting the disk management information stored in the management information memory means. A disk recording / reproducing device comprising: 4. The disk recording / reproducing apparatus according to claim 1, wherein said management information memory means stores a part of a corresponding data area in addition to the disk management information. A disk recording / reproducing apparatus characterized by the above-mentioned. 5. The disc recording / reproducing apparatus according to claim 1, wherein said disc identification means reproduces and detects a non-rewritable disc-specific number recorded in a recording / reproducing area of a disc medium. A disk recording / reproducing apparatus characterized in that it is a disk recording / reproducing apparatus. 6. The disc recording / reproducing apparatus according to claim 1, wherein said disc identification means reads and detects a disc-specific number added to a portion other than a recording / reproducing area of a disc medium. A disk recording / reproducing apparatus characterized by the above-mentioned. 7. The disk recording and reproducing apparatus according to claim 1, wherein said management information memory means is a nonvolatile memory.