JPH1116284A - Record medium and recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a record medium and a recording device capable of recognizing the sector size of the record medium without using a recording/ reproducing circuit which each corresponds to its sector size. SOLUTION: Data included in one sector of an optical disk for 512B, an optical disk for 2KB, and an optical disk for 32KB are divided into respective units for each 512B. Each unit is added with an ECC common to each disk. And the first unit of each sector of each disk is recorded with a reference and a header common to each disk. The first unit of the control information region of each disk is recorded with disk information. When a disk is loaded, the recording/reproducing device reads the unit in which this disk information is recorded to judge which one of the optical disk for 512B, the optical disk for 2KB, and the optical disk for 32KB is loaded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium capable of recording data in a plurality of sector sizes and a recording apparatus for recording data on the recording medium.

[0002]

2. Description of the Related Art Conventionally, recording media capable of recording and reproduction, such as a magnetic disk, an optical disk, and a magneto-optical disk, have been known. In such a recording medium capable of recording and reproduction,
A sector size, which is a unit for writing and reading data, is specified. For example, as this sector size, 512B (Byte) / Sector, 2K
B / Sector, 16KB / Sector, 32KB
/ Sector.

[0003]

By the way, even if the recording media are of the same type and have the same physical format, if the sector sizes of the recorded data are different,
Unless the recording / reproducing device has a recording circuit and a reproducing circuit dedicated to the sector size, the data cannot be read.

For example, even if the physical format is the same for a magneto-optical disk, the data format of the magneto-optical disk is 2 KB / Sector and 32 KB.
/ Sector size may exist.
In such a case, in a recording / reproducing apparatus having only a 32 KB / Sector recording / reproducing circuit, 2 KB / Sector is used.
Data cannot be read from the magneto-optical disk recorded by Sector. Therefore, 32 KB / Sect
Since a recording / reproducing apparatus having only a recording / reproducing circuit of or cannot recognize a magneto-optical disk recorded at 2 KB / Sector, it is erroneously determined that the magneto-optical disk is a virgin disk, and processing such as initialization is performed. Was sometimes done. On the contrary, 2KB / Secto
Since a recording / reproducing apparatus having only a recording / reproducing circuit of r cannot recognize a magneto-optical disk recorded at 32 KB / Sector, it is erroneously determined that the magneto-optical disk is a virgin disk, and processing such as initialization is performed. Was sometimes done.

According to the present invention, even if the recording media have different sector sizes, the recording / reproducing apparatus does not have a recording / reproducing circuit corresponding to each sector size, and can recognize the suc- tor size of these recording media. It is an object to provide a recording medium and a recording device.

[0006]

In order to solve the above-mentioned problems, a recording medium according to the present invention comprises one of a plurality of recording media on which data having a common physical format and different sector sizes are recorded. A recording medium on which data is recorded in a sector size, wherein a management information area having a common size is provided for each sector size in which management information is recorded.

In this recording medium, a management information area having a common size is provided for each sector size in which the management information is recorded.

A recording apparatus according to the present invention is a recording apparatus for recording data with at least one sector size on a plurality of recording media on which data having a common physical format and different sector sizes are recorded. Management information recording means for recording management information of a common size for each sector size is provided.

This recording apparatus records management information having a common size for each sector size.

[0010]

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

According to an embodiment of the present invention, a sector size, which is a unit for writing and reading data, is 512 B / s.
Sector's magneto-optical disk (hereinafter referred to as 512B optical disk) and a sector size of 2 KB / Sect.
A magneto-optical disk (hereinafter referred to as a 2 KB optical disk) and a 32 KB / Sector magneto-optical disk (hereinafter referred to as a 32 KB optical disk) will be described.

As shown in FIG. 1A, in an optical disk for 512B according to an embodiment of the present invention, a sector area in which data of one sector is recorded is divided into a plurality of segments. In the 2 KB optical disc according to the embodiment of the present invention, as shown in FIG. 1B, a sector area in which one sector of data is recorded is divided into a plurality of segments. Also, 32 KB according to the embodiment of the present invention.
In the optical disc for use, as shown in FIG. 1C, a sector area in which data of one sector is recorded is divided into a plurality of segments. Each sector area of each of these disks is
For example, it is divided into segments by clock marks multiplexed on wobbles and the like and prepits used for sample servo. Each segment of the 512B optical disk, the 2KB optical disk, and the 32KB optical disk has the same size.
The sector area of the optical disc for 32 KB and the optical disc for 32 KB is an integral multiple of this segment.

As shown in FIG. 2, data recorded in the sector area of each disk includes Reference and Hea.
der, main data and their error correction codes (E
CC) etc. are recorded as one sector. Where R
The reference and the header are, for example, a synchronization code and a data address code, or data used for controlling laser power.

The data recorded as one sector is recorded on the track of the optical disk as shown in FIG.
It is recorded as a data stream divided by the unit. Specifically, in the case of the 512B optical disk, FIG.
As shown in (a), data for one sector to which ECC is added is recorded as one unit. Also, 2K
In the optical disk for B, as shown in FIG. 3B, data of one sector is divided into four units, and
CC is added and recorded. That is, in the 2 KB optical disc, data for one sector is divided into units of 512 B and recorded. Also, as shown in FIG. 3B, a 32 KB optical disc has six sectors of data.
It is divided into four units, and ECC is added to each unit and recorded. That is, in the 32 KB optical disk, data for one sector is divided into units of 512 B and recorded.

In each disk, the first unit of one sector data includes the above-mentioned Reference and Header. This Reference and H
The header is common to the 512B optical disk, the 2KB optical disk, and the 32KB optical disk. The ECC added to each unit is generated by the same error correction method. That is, the same encoding and decoding circuit can decode or encode the ECC added to each disk unit.

This unit is recorded in an area which is an integral multiple of the above-mentioned segment, and has a size which is 1 / integral of the data size of one sector in each sector format. Not exclusively. As a result, a unit having a common size can be formed by the 512B optical disk, the 2KB optical disk, and the 32KB optical disk.

Also, the EC added to each unit
In addition to C, 2nd ECC of one unit or more units can be added to each sector data. Specifically, the optical disk for 512B is shown in FIG.
As shown in (1), one unit of 2nd ECC is added to one sector of data. Also, as shown in FIG. 4B, the 2 KB optical disc is composed of four units of data of one sector, and 2n for these four units.
One more dECC is added. In addition, 32KB
As shown in FIG. 4 (c), the optical disc comprises 64 data of one sector, and a plurality of 2nd ECCs are added to the 64 units. Note that this 2
The ndECC does not need to be generated by the same error correction method on each disk. That is, the same encoding and decoding circuit may not be able to decode or encode the ECC added to each disk unit. As described above, the correction capability can be improved by adding the second ECC. Further, since the redundancy is increased by the second ECC, it may be added only to a portion where important information is recorded due to the correction capability.

[0018] Such an optical disk for 512B, 2 KB
As shown in FIG. 5, a data management area is provided at the head of the medium, for example, at the inner circumference of the disk, and at the end of the medium, for example, at the outer circumference of the disk. Each of these disks is provided with a data recording area in an area between the inner and outer management areas.

In the inner and outer management areas, for example, first to fourth defect management areas (DMAs) are provided. The data recording area is divided into zones, for example, divided into n zones from zone 1 to zone n.

The first to fourth DMAs each record the same information. Even if any of the first to fourth DMAs cannot be read due to a scratch on the disk, a writing error, or the like, the same information is recorded in another location to complement each other. . Also, each DMA
The physical position on the disc is defined in advance at a predetermined position. For example, it is defined that a DMA is recorded at a common position in each of an optical disk for 512B, an optical disk for 2KB, and an optical disk for 32KB. As shown in FIG. 6, each such DMA includes a PDL (Primary Defect L) which is a list of defective sectors and their replacement sectors.
ist) and SDL (Secondly Defect List)
A disk information area is provided at the beginning. This disk information area is data composed of one unit. Therefore, for example, in the case of an optical disk for 512B,
The disk information area is data composed of one sector.

Specific data recorded in such a disc information area includes, for example, as shown in FIG. 7, the disc type, physical information, unit size, data unit ECC type, and second ECC unit. ECC
Type, type of zone n (here, n is an integer from 1 to n), sector size of zone n,
For example, the type of the second ECC of the zone n.

The type and physical information of the disc are, for example, 64
It indicates whether the disc is recorded as byte data and is recordable or is a read-only disc.
The unit size is recorded as, for example, 4-byte data, and indicates the data size of the unit described above. The data size of this unit is not limited to 512 bytes. The ECC type of the data unit is recorded as, for example, 2-byte data, and is added to each unit.
It shows the type of coding of CC. The ECC type of the 2nd ECC unit is, for example, recorded as 2-byte data, and added to the end of the above-described plurality of units, and
It shows the type of ECC encoding. The type of the zone n is recorded, for example, as 2-byte data, and indicates whether each zone is recordable, read-only, or recording is prohibited. The sector size of the zone n is recorded, for example, as 2-byte data,
It shows the size of the sector in each zone. That is, when data is recorded in a different sector size for each zone, the sector size of each zone is determined based on this information. The type of the 2nd ECC of the zone n is, for example, 2-byte data recorded, and indicates the type of encoding of the 2nd ECC for each zone. For a portion where the predetermined information is not recorded, the reserve (R
In this case, the data recorded in one unit is adjusted.

As described above, the 512B optical disk, 2
It is specified that a DMA is recorded at a common position in each of the KB optical disc and the 32 KB optical disc, and a disc information area is provided at the head of the DMA. In this disc information area, information is recorded in units of a unit having a data size common to the 512B optical disc, the 2KB optical disc, and the 32KB optical disc. Therefore, an EC with an unsupported sector size
Even a recording / reproducing apparatus having a C circuit can read the data in the disk management information area and recognize the sector size of the disk.

Next, an optical disk recording / reproducing apparatus 10 for recording / reproducing data on / from each of such disks includes, for example, an optical pickup 11, a magnetic head 12, a recording / reproducing section 13 as shown in FIG. , An encoder / decoder 14 and a host computer 15.

The optical pickup 11 has a laser diode, an objective lens and the like, and irradiates a laser beam to the optical disc D to obtain a reproduced signal. The magnetic head 12 is an optical disk D
A modulation magnetic field is applied when data is recorded on the recording medium. The recording / reproducing unit 13 performs processing such as binarization and demodulation on the reproduced signal from the optical pickup 11 and supplies the reproduced signal to the encoder / decoder 14. Further, the recording / reproducing unit 13 controls the magnetic head 12 and performs servo control of the optical pickup 11. The encoder / decoder 14 includes an ECC circuit for 512 B / Sector, an ECC circuit for 2 KB / Sector,
Alternatively, an ECC circuit for 32 KB / Sector or all of them are used to perform an error correction process or the like. The encoder / decoder 14 and the host computer 15 transmit data by SCSI.

Such an optical disk recording / reproducing apparatus 10
Has an ECC encoding and decoding circuit in which the recording / reproducing unit 13 is added in the above-described unit. Thus, the optical disk recording / reproducing apparatus 10 can reproduce the respective disk management information areas of the 512B optical disk, the 2KB optical disk, and the 32KB optical disk.
That is, since the physical position of the DMA is defined for each disk, the recording / reproducing apparatus 10 for the optical disk can read the head unit of the DMA when the disk is inserted, and can read the 512B optical disk. Any type of disc, that is, a 2 KB optical disc and a 32 KB optical disc, can be recognized.

Accordingly, the optical disk recording / reproducing apparatus 10
However, for example, even if only a 2 KB / sector ECC circuit is provided in order to reduce cost, 512
When an optical disk for B or an optical disk for 32 KB is inserted, these disks can be recognized.

As an embodiment of the present invention, 512
Although the description has been made using three disks: the optical disk for B, the optical disk for 2KB, and the optical disk for 32KB,
The present invention is not limited to these three disks, but can be applied to a magneto-optical disk having another sector size. Also,
The present invention is not limited to a magneto-optical disk, but may be any recording medium that records data in predetermined write and read units.
Can be applied.

[0029]

According to the recording medium of the present invention, a management information area having a common size is provided for each sector size in which the management information is recorded. The data in the area can be read, and the sector size of the disk can be recognized.

The recording apparatus according to the present invention includes management information recording means for recording management information having a common size for each sector size. Can be read, and the sector size of the disk can be recognized.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a sector as a unit for writing and reading data on a magneto-optical disk to which the present invention is applied.

FIG. 2 is a diagram illustrating data recorded in a sector of the magneto-optical disk.

FIG. 3 is a diagram illustrating units constituting sectors of the magneto-optical disk.

FIG. 4 is a diagram illustrating units constituting sectors of the magneto-optical disk.

FIG. 5 is a diagram illustrating a recording area of the magneto-optical disk.

FIG. 6 is a diagram illustrating a defect management area of the magneto-optical disk.

FIG. 7 is a diagram for explaining a disk information area of a defect management area of the magneto-optical disk.

FIG. 8 is a block diagram of a recording / reproducing apparatus to which the present invention is applied.

[Explanation of symbols]

10 recording / reproducing device, 13 recording / reproducing unit, 14 encoder / decoder

Claims (6)

[Claims] 1. A plurality of recording media in which data having a common physical format and different sector sizes are recorded.
1. A recording medium on which data is recorded with a sector size of, wherein a management information area having a common size is provided for each sector size on which management information is recorded. 2. The recording medium according to claim 1, wherein the management information area has a size that is a fraction of an integer of each sector size. 3. The management information area, wherein an error correction code for the management information is recorded together with the management information, and a second error correction code is further recorded outside the management information area. Item 2. The recording medium according to Item 1. 4. A recording apparatus for recording data with at least one sector size on a plurality of recording media on which data having a common physical format and different sector sizes are recorded. A recording device comprising management information recording means for recording size management information. 5. The recording apparatus according to claim 4, wherein the management information recording means records the management information in a size that is a fraction of an integer of each sector size. 6. The management information recording means records an error correction code for the management information together with the management information in a common size for each sector size, and further stores a second outside of the management information and the error correction code. The recording device according to claim 4, wherein the recording device records an error correction code.