JP2002352565A - Disk recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent any fear that disk reproduction is interrupted when it takes a long time to perform an access since the deterioration of a processing speed occurs due to the access accompanying the reproduction of a disk in which data are distributed and recorded. SOLUTION: This disk recording/reproducing device is provided with a cache means for storing recorded data to be recorded in a disk, and when it is decided that the recorded data are physically discontinuously distributed and recorded due to the presence of an already recording area where the recorded data are already recorded in the middle of a vacant area on a disk, the recorded data from the already recording area are read from the disk, and stored in the cache means, and the recording order of the data stored in the cache means in the disk by file units is edited, and the data recording is physically continuously operated from the writing start position on the disk by the file units in this edited order. Thus, it is possible to suppress the generation of any access in the same file when reproducing the disk by preventing the same file from being distributed or recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cache memory for storing write data transmitted from a host,
The present invention relates to a disk recording / reproducing apparatus for recording data recorded on a disk by encoding data stored in the cache means, and particularly to a rewritable disk recording / reproducing apparatus for recording data on a disk in a file format.

[0002]

2. Description of the Related Art As a rewritable disk recording / reproducing apparatus, a CD-RW drive is used in the CD system,
In the VD system, a DVD-RW drive or DVD-R
An AM drive is known, and these disc recording / reproducing apparatuses adopt UDF (Universal Disk Format) as a file format so that data recorded on a disc can be handled as a file of a personal computer.

Therefore, these disk recording / reproducing apparatuses record data on a disk in a file format defined by the file format.

By the way, in such a disk recording / reproducing apparatus which records data on a disk in a file format, a file once recorded on the disk is erased to form an empty area on the disk.

[0005] Therefore, in the disk recording / reproducing apparatus, data can be distributed and recorded in the empty areas dispersedly provided on the disk so as not to waste this empty area.

[0006]

By the way, when a distributed-recorded disk is reproduced, the processing speed is reduced due to the access, and if the access takes time, the reproduction of the disk is interrupted.

In a disk recording / reproducing apparatus,
Until the data requested to be recorded on the disk has been processed, the next data cannot be received. During this period, the host computer cannot perform the next processing. If the requested data cannot be transmitted early, the waiting period for data transmission of the personal computer increases, which is inefficient.

[0008]

According to the present invention, there is provided a cache means for storing recording data to be recorded on a disk, and a physical area is determined by the existence of a recorded area in which recording data is already recorded in the middle of an empty area on the disk. When it is determined that the recording data is recorded in a discontinuous manner, the recording data is read from the recorded area from the disk and stored in the cache unit, and the data stored in the cache unit is stored in file units. To edit the order of recording on the disk, and perform data recording physically continuously from the write start position on the disk in file units in the editing order. This prevents the same file from being divided and recorded, thereby suppressing the occurrence of access in the same file during reproduction.

[0009]

FIG. 1 is a block diagram showing an embodiment of a disk recording / reproducing apparatus according to the present invention.

In FIG. 1, 1 is a personal computer 2 on the host side.
An interface 3 for controlling the transfer of data to and from the PC 3, encodes the data input from the personal computer 2 to create recording data in a form to be recorded on the disk, and decodes the recording data read from the disk to generate a file. A data processing circuit 4 for reproducing data temporarily stores data input / output via the interface 1, and a buffer RAM 5 used for data processing by the data processing circuit 3, and a disk drive 5 for driving the disk A disk drive unit including a unit 6 and a head unit 7 for driving and controlling an optical head for writing and reading data to and from the disk; 8, a system control circuit for controlling the entire system related to recording and reproduction of the disk; Data temporarily stored in the buffer RAM 4 when recording Hard to be cached means for storing and transfer (hereinafter, HD) hard disk drive with a recording medium (hereinafter, HD drive)
It is.

The system control circuit 8 includes a buffer RA
RAM control means 10 for controlling writing and reading of data to and from M4, HD drive control means 11 for controlling writing and reading of data to and from the HD of the HD drive 9, and data stored in the HD of the HD drive 9 File editing means 12 for editing the order of recording on the disk in units.

In the disk recording / reproducing apparatus configured as described above, when a command of a disk write request is input from the personal computer 2 to the system control circuit 8 via the interface 1, the system control circuit 8 causes each circuit and mechanical parts Is controlled to a recording state in which recording is performed on a disk.

In this recording state, the interface 1
The file data of the write request sent from the personal computer 2 via the RAM is temporarily stored in the buffer RAM 4, the data is added with an error detection code and an error correction code by the data processing circuit 3, and the data is subjected to modulation processing according to the disk medium. Then, a synchronization signal is added to the encoded data and the encoded data is encoded into recording data to be recorded on a disk. This recorded data is HD
After being stored in the HD of the drive 9 and being edited as necessary to find the writing position of the disk, it is supplied to the disk drive unit 5 and recorded on the disk.

When the file data is recorded on the disk in this manner, file information of the data recorded on the disk is generated in association with the physical address on the disk, and all the data of the file requested to be written are generated. Is recorded on the disc, its file information is also written to a predetermined part of the volume descriptor area of the disc.

FIG. 2 is a flowchart showing the main processing of the present invention which is executed under the control of the system control circuit 8 when recording a disc.

Referring to FIG. 2, the processing at the time of disk recording will be described in detail.

When there is a recording request from the personal computer 2 to the disk (step a), the data of the recording request file received via the interface 1 is encoded by the data processing circuit 3 and recorded on the disk. After that, the recording data is supplied to the HD drive 9 and sequentially stored in the HD (step b).

Next, it is determined whether or not the data reception of the recording request file has been completed (step c). If the data reception has not been completed, the data reception is continued. End of data reception by PC2
(Step d).

Here, the end of the data reception is reported at the time when the recording data is stored in the HD of the HD drive 9, not at the time when the recording on the disk is actually completed. Since the recording speed is orders of magnitude higher than the recording speed, the speed at which the personal computer 2 transitions to the next process is increased, and the waiting period for data transmission of the personal computer 2 is reduced.

When the data reception is completed, the HD drive 9
It is confirmed that the recording data to be recorded on the disk is stored in the HD (step e), and if the recording data to be recorded on the disk is confirmed, the recording area of the recording data on the disk is set. (Step f).

Based on the setting of the recording area on the disk, it is determined whether or not it is necessary to distribute and record the data in the free areas distributed on the disk (step g), and as shown in FIG. As described above, when there is recorded data in which recorded data is already recorded in the middle of an unrecorded free area on a disc, and it is determined that distributed recording is necessary, the data amount of the recorded data is reduced to an HD drive. It is confirmed whether or not the remaining amount of the HD 9 is within the remaining amount (step h).

If the data amount of the recorded data is the HD drive 9
When it is confirmed that the remaining data is within the remaining amount of the HD, the recorded data is read from the disk, and the read recorded data is stored in the HD of the HD drive 9 (step i) and stored in the HD. The recorded data is edited in chronological order in file units (step j).

On the other hand, when it is determined that distributed recording is not necessary, and when the data amount of the recorded area is
If the amount is larger than the remaining amount of D, the recorded data in the middle of the free space on the disk is not stored in the HD of the HD drive 9, but the recorded data stored in the HD is edited in file order in chronological order. (Step j).

When the editing of the recording data stored in the HD is executed, it is then determined whether or not it is the recording execution timing for actually recording the recording data on the disk (step k). Then, H
The recording data stored in the HD of the D drive 9 is recorded on the disk (step 1).

For this reason, the recording data corresponding to the data of the recording request file transmitted from the personal computer 2 is recorded on the disk in chronological order. In particular, in the situation where the recorded data exists on the disk and the distributed recording is required. In this case, the recorded data is downloaded to the HD of the HD drive 9 so that the recorded data is recorded from the beginning of the empty area as shown in FIG. The recording data (files 1, 2, 3,...) Corresponding to the data of the recording request file from the server is recorded physically continuously on the disk without being dispersedly recorded.

If it is not the time to execute recording on the disk in the process of step k, the flow returns to step a, and the computer 2 waits for a request for recording on the disk.
When there is a request for recording from the personal computer 2 to the disk again, the processing after step b is repeated.
The data is additionally stored in the HD of the drive 9 and recorded on the disk.

Here, the recording execution timing on the disk in the process of step k means that when the HD of the HD drive 9 is full, when the recorded disk is ejected, the system power is shut off. And when the data of the recording request file to be continuously recorded is transmitted from the personal computer 2 and a write request to the disc is made.

[0028]

As described above, according to the present invention, when recorded data exists in the middle of an empty area on a disk and distributed recording is required, the recorded data is transferred to the cache means. The recorded data is recorded from the beginning of the free area, and the recorded data corresponding to the data of the recording request file is recorded continuously and continuously on the disk without being dispersedly recorded. Thus, it is possible to suppress the occurrence of access within the same file during disc playback.

When the recording data corresponding to the data of the recording request file is stored in the cache means, the data requesting recording on the disk can be transmitted from the host side. The host can work efficiently.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a disk recording / reproducing apparatus according to the present invention.

FIG. 2 is a flowchart showing main processing of the present invention executed under control of a system control circuit 8 during recording on a disc.

FIG. 3 is an explanatory diagram for explaining an original state on a disk and a state in which recording is physically continuously performed when recorded data exists in the middle of an empty area on the disk and distributed recording is required. is there.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Interface 2 Personal computer 3 Data processing circuit 5 Disk drive part 8 System control circuit 9 Hard disk drive

Claims (4)

[Claims] 1. An encoding process for writing data transmitted from a host side for recording on a disk to recording data in a form for recording on a disk, and recording the recording data on the disk, and rewritable in a file format. In the disk recording / reproducing apparatus, a cache unit for storing recording data to be recorded on the disk is provided, and the recording data is physically discontinuous due to the existence of the already recorded area where the recording data is already recorded in the middle of the empty area on the disk. When it is determined that the data is distributed and recorded, the recording data is read from the recorded area from the disk and stored in the cache unit, and the order of recording the data stored in the cache unit on the disk in file units is determined. Edit, and physically continue from the writing start position on the disc in file units in this editing order. A disk recording / reproducing apparatus characterized in that data recording is performed by performing data recording. 2. The disk recording / reproducing apparatus according to claim 1, wherein the order in which data stored in said cache means is recorded on a disk which is edited in file units is a time-series order. 3. When it is determined that the data amount of the recorded data in the recorded area is larger than the data amount that can be recorded in the cache means, the recorded data in the recorded area is reproduced from the disc and the cache means 2. The disk recording / reproducing apparatus according to claim 1, wherein a storing process is omitted. 4. The disk recording and reproducing apparatus according to claim 1, wherein a hard disk is used as said cache means.