JPH11327800A - Data copying method for disk recording medium and disk recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a copying time by reading data at a copying party without any seeking or while minimizing seeking. SOLUTION: At the copying party, the data area read out without any seeking or while seeking is minimized. At a copy request from an operation part 3, a control part 4 reproduces a disk in a disk drive A1 to read out the file management information of a file to be copied and temporarily record it in a file management part 8 when the request indicates a read free of seeking. Then the file is read out while its file management information is ignored, namely, without seeking and its data are stored in a memory 9. Then the control part 4 takes the data out of the memory 9 in order according to the file management information recorded in the file management part 8 and transfers them to a disk drive B2. When the request indicates a read with seeking, only nearby tracks are sought.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording method and a disk recording apparatus for a disk recording medium, and more particularly to a block (sector) in which a track for recording data has a predetermined length.
The present invention relates to a data copying method and a disk recording apparatus for a disk recording / reproducing apparatus using a disk recording medium divided into a plurality of pieces.

[0002]

2. Description of the Related Art In recent years, with the advent of large-capacity storage media such as magnetic disks, optical disks, magneto-optical disks, and DVDs (digital video disks), a large amount of data has been recorded and stored in one storage medium. It has become to. Copy operations for transferring all or some data recorded on such a large-capacity storage medium to another storage medium are frequently performed. In the case of such a copying operation, a process of reading data from a copy source disk, a process of transferring the read data to a copy destination, and a process of recording the transferred data on a copy destination disk are required.

[0003]

However, in the conventional data copying method, when data is read from the disk at the copy source, if the data is not continuous, the number of seeks increases and it takes time to read. become.
Seek is an operation in which the optical pickup is moved in the radial direction to search for data when data is not physically continuously recorded on the disk.When data is edited, it is deleted or placed. When the data length to be added or replaced is longer than the data to be replaced, this occurs when an extra data portion is recorded in an empty block portion. When such seek operations increase, the reading time increases, so that the data transfer rate decreases and the copying time increases. In particular, it takes a long time to copy a single large-capacity disk recording medium such as a DVD.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a data recording method and a disk recording device for a disk recording medium capable of shortening a copying time.

[0005]

According to the present invention, in order to achieve the above object, when data recorded on one disk is copied to another disk, no seek occurs at the copy source or the occurrence of a seek does not occur. Data is read at a minimum to reduce the reading time.At the copy destination, the data is rearranged for each scene or file, and the data structure at the copy source is maintained by rewriting the file management information. The data transfer rate is secured to shorten the copying time as a whole.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention relates to a disk recording / reproducing apparatus using a disk recording medium in which an area for recording data is divided into blocks of a predetermined length. When copying data recorded on a disc to another disk, no seek occurs at the copy source or the data is read and transferred to the copy destination while minimizing the occurrence of seek. A data copy method for a disk recording medium characterized by maintaining a data structure at a copy source by replacing or rewriting file management information, wherein no seek occurs at a copy source or the occurrence of a seek is minimized. Because I read the data,
This has the effect of minimizing the reading time and shortening the copying time as a whole.

According to a second aspect of the present invention, there is provided a data copying method according to the first aspect, wherein data is read continuously without seeking at a copy source. Even if data is read continuously without seeking, there is an effect that the reading time can be minimized.

According to a third aspect of the present invention, there is provided a data copy method according to the first aspect, wherein a data is read by performing only a seek on an adjacent track at a copy source. Since the reading is performed only on the track to be read, the reading time can be shortened.

According to the invention described in claim 4 of the present invention, the apparatus itself performs continuous reading without seeking in accordance with the transfer capacity and transfer time, and the case where only the seek to an adjacent track is performed by reading. 2. The data copying method according to claim 1, wherein the data is adaptively controlled, and has an operation of automatically selecting an optimum reading method according to the type of data.

According to a fifth aspect of the present invention, at the copy destination, the recording position of the actual data is sequentially determined based on the file management information transferred from the copy source, and the data is physically continuous. 5. The data copying method according to claim 1, wherein the data recording positions at the copy destination can be physically continuous, so that no seek occurs during reproduction. , Which has the effect of guaranteeing the bit rate.

According to a sixth aspect of the present invention, in the copy destination, after the real data transferred from the copy source are sequentially recorded, the data is transferred from the copy source so that the real data can be read continuously. 5. The data copy method according to claim 1, wherein the received file management information is corrected, and the occurrence of seek during reproduction is suppressed by making the recording positions of data at the copy destination as continuous as possible. Therefore, the bit rate can be guaranteed.

According to a seventh aspect of the present invention, there is provided a disk recording apparatus using a disk recording medium in which a track for recording data is divided into blocks of a predetermined length. A disk drive and a copy destination disk drive, and a control unit that controls reading and transfer of data between the copy source disk drive and the copy destination disk drive. Data is read and transferred to the copy destination with no occurrence or minimization of seek, and control is performed so that the data structure at the copy source is maintained by rearranging each file or rewriting the file management information at the copy destination And seek occurs at the copy source. No or since the occurrence of seek to read the data with minimal, it is possible to minimize the read time, an effect that can generally reduce the copy time.

According to an eighth aspect of the present invention, in the disk recording apparatus according to the seventh aspect, the control unit controls so as to read only data by performing only seek on an adjacent track at a copy source. Since the data recording positions at the copy destination can be physically continuous, there is an effect that no seek occurs during reproduction and the bit rate can be guaranteed.

According to a ninth aspect of the present invention, in the disk recording apparatus according to the seventh or eighth aspect, the control unit determines that data to be copied is more than a predetermined value on the disk recording medium at the copy source. When the data is divided into tracks, the data is controlled so as to be read continuously without seeking data.
Since the data is continuously read without seeking even for the data for one sheet, there is an effect that the reading time can be minimized.

An embodiment of the present invention will be described below with reference to the drawings. (Embodiment) FIG. 1 shows the configuration of a disk recording / reproducing apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a first disk drive, and 2 denotes a second disk drive, each of which reads and writes data from and on a disk recording medium. Reference numeral 3 denotes an operation unit where the user inputs an instruction such as copying. Reference numeral 4 denotes a control unit composed of a CPU or the like, a system control unit 5 for controlling the entire apparatus, a drive control unit 6 for controlling the disk drives 1 and 2, a memory control unit 7 for controlling a memory, A file management unit 8 for managing the contents of recorded scenes or files is provided. Reference numeral 9 denotes a memory for temporarily storing data when data is copied. Reference numeral 10 denotes a system decoder for separating encoded data read from a disc into a video signal and an audio signal, 11 a video decoder for decoding the encoded video signal, and 12 a D / D for converting the decoded video signal to an analog signal. The A converter 13 is a monitor such as a liquid crystal display for displaying an analog video signal as a visible image. Reference numeral 14 denotes an audio decoder that decodes the encoded audio signal, 15 denotes a D / A converter that converts the decoded audio signal into an analog signal, and 16 denotes a speaker that outputs the analog audio signal as audible sound.

The data structure on a disk in such a disk recording and reproducing apparatus will be described. As shown in FIG. 2, a spiral or concentric track is composed of a plurality of fixed-length blocks called sectors 21, of which a portion usable by a user includes a user area 22 and a replacement area 23. It is. Data is recorded in the user area 22, and the replacement area 23 is an area for recording in place of a part of the sector 21 in the user area 22 when a part of the sector 21 is defective and data cannot be recorded in that part. . Each sector 21 is divided into position management information 24 indicating the number of the sector and a data area 25 in which data is actually recorded. There may be a case where the data area 25 is located first, and the position management information 24 follows. In addition, in the case of a video signal, an additional information area for recording the date and time of shooting may be provided.

A file is constituted by a group of such sectors on which data is recorded. One of the methods of managing the connection order of the sectors constituting the file is used in an OS (operation system) such as a personal computer. There is a FAT (File AllocationTable) method. This is, for example, as shown in FIG.
2 and the FAT 33 constitute the file management information 31, which is recorded in the first sector of the file. The file management table 32 records the file name and the first cluster (sector) of the file name.
Indicates the cluster number (sector number) in the data area
And a content column indicating which clusters are connected to each other.

When reading the file data on the disk, first, the file management table 32 of the file management information 31 is searched to check the existence of the file to be accessed, and if the file exists, the FAT 33 is read. FAT
From 33, connection information or free space information of the clusters constituting the file can be obtained. Therefore, the contents of the file recorded in the data area 25 are read out in the order specified by the FAT 33. When copying file data to a disk, first, free information that can record a specified file is obtained from the FAT 33. Next, the data is sequentially recorded in the empty area, and the connection state of the data is recorded in the FAT 33. Further, the recorded file name, attribute, and leading cluster are also recorded in the file management table 32. In this way, the continuity of data is ensured for the first time by the file management information 31, and even if data is recorded scattered around, it can be reproduced as one continuous data.

Next, a copy operation in the disk recording / reproducing apparatus will be described with reference to FIGS. First, when a copy request is received from the operation unit 3 (step S1), the control unit 4 determines whether the request is read without seek (step S2). In the case of the read without seek, the disk is subsequently reproduced by the disk drive A1, the file management information of the file to be copied is read, and it is temporarily recorded in the file management unit 8 (step S3). Next, disk drive A
According to 1, the file is read ignoring the file management information, that is, without seeking, and the data is stored in the memory 9 (step S4). Next, the control unit 4
Based on the file management information recorded in the file management unit 8, data is sequentially taken out from the memory 9 and transferred to the disk drive B2 (step S5). In the disk drive B2, the transferred data is recorded in the order specified by the file management information, and the control unit 4 writes the connection order in the FAT of the file management information (step S).
6).

As described above, when reading without seeking at the copy source, high-speed reading and high-speed transfer can be performed. By correctly rearranging data when recording on the disc at the copy destination, the data can be read at the copy destination. , All the data are physically and logically continuous, and the reproducibility of the data can be secured.

On the other hand, in the case of reading with seek in step S2, first, as shown in FIG.
1 to read the disc, read the file management information of the file to be copied, and temporarily record it in the file management unit 8 (step S7). Next, the disk drive A1 refers to the file management information to perform a seek only for a seek to an adjacent track, reads a file, and stores the data in the memory 9 (step S8). Next, the read data is sequentially read from the memory 9 and transferred to the disk drive B2 (step S9). In the disk drive B2, the transferred data is sequentially recorded, and the control unit 4 determines the new connection order due to the seek in the FA of the file management information.
T, and seek information over two or more tracks is searched from the file management information.
The file management information is corrected by adding it to T (step S10).

As described above, at the copy source, only the seek to the adjacent track is performed, so that the seek is performed.
The reading time and the transfer time can be reduced, and the continuity of the data at the time of reproduction can be secured by correcting the file management information based on the changed connection order at the copy destination.

In the above-described embodiment, the user selects the case where no seek is performed and the case where the seek is performed. However, the apparatus itself may adaptively determine from the transfer capacity, the read transfer time, and the like. Good. For example, when copying one DVD disk, it is faster to read without seeking and rearranging later, so if the user instructs all copying, select the no seek mode. I do. Even when copying some files in the disk, if the number of seeks is equal to or more than a predetermined number when the file management information is read, the no-seek mode is selected.

Further, in the above embodiment, the case where one disk recording / reproducing apparatus is provided with two disk drives has been described, but one disk recording / reproducing apparatus has one disk drive.
Of course, the present invention can be similarly applied to a case in which one disk drive is provided and data is copied between different disk recording / reproducing apparatuses.

[0025]

According to the present invention, as is apparent from the above embodiment, when data recorded on one disc is copied to another disc, no seek occurs at the copy source or the occurrence of seek is minimized. By reading the data with the minimum possible, the reading time is shortened, and at the copy destination,
Sort that data by scene or file,
Since the data structure at the copy source is maintained by rewriting the file management information, there is an effect that the data transfer rate can be secured and the entire copy time can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a disk recording / reproducing apparatus to which a data copy method according to an embodiment of the present invention is applied;

FIG. 2 is a schematic diagram showing a data structure on a disk according to the embodiment;

FIG. 3 is a schematic diagram showing file management information according to the embodiment;

FIG. 4 is a flowchart showing an operation in the case of reading without seek in the embodiment.

FIG. 5 is a flowchart showing an operation in the case of reading with seek according to the embodiment;

[Explanation of symbols]

 1 disk A 2 disk B 3 operation unit 4 control unit 5 system control unit 6 drive control unit 7 memory control unit 8 file management unit 9 memory 10 system decoder 11 video decoder 12 D / A converter 13 monitor 14 audio decoder 15 D / A Converter 16 speaker

Claims (9)

[Claims] In a disk recording / reproducing apparatus using a disk recording medium in which a track for recording data is divided into blocks of a predetermined length, when data recorded on one disk is copied to another disk In the copy source, data is read and transferred to the copy destination with no seek or minimizing the occurrence of seek at the copy source. A data copy method for a disk recording medium, characterized by maintaining the following. 2. The data copy method according to claim 1, wherein the data is read continuously without seeking at the copy source. 3. The data copy method according to claim 1, wherein at a copy source, data is read by performing only seek on an adjacent track. 4. The apparatus according to claim 1, wherein the apparatus adaptively controls the case where the reading is continuously performed without seeking according to the transfer capacity and the transfer time and the case where only the seek is performed on the adjacent track. The data copy method according to claim 1. 5. A copy destination, wherein recording positions of actual data are sequentially determined based on file management information transferred from a copy source, and data is recorded so as to be physically continuous. Item 5. The data copy method according to item 1, 2, or 4. 6. A method according to claim 1, wherein the copy destination sequentially records the actual data transferred from the copy source, and then modifies the file management information transferred from the copy source so that the actual data can be read continuously. Claim 1.
Or the data copying method described in 3 or 4. 7. A disk recording apparatus using a disk recording medium in which a track for recording data is divided into blocks of a predetermined length, a copy source disk drive, a copy destination disk drive, and a copy source disk drive. A control unit that controls reading and transferring of data between the disk drive and the copy destination disk drive, and the control unit does not generate a seek at the copy source or minimizes the occurrence of a seek to transfer data. A disk recording apparatus which reads and transfers the data to a copy destination, and controls so as to maintain the data structure at the copy source by rearranging each file or rewriting the file management information at the copy destination. 8. The disk recording apparatus according to claim 7, wherein the control unit controls to read data by performing only seek on an adjacent track at a copy source. 9. The control section controls the data to be read continuously without seeking when the data to be copied is divided into tracks separated from a predetermined value on a disk recording medium at the copy source. 9. The disk recording device according to claim 7, wherein