JPH0554547A - Optical disk and its data writing method - Google Patents

Abstract

PURPOSE:To effectively use the remaining recording blocks even though alternate regions of certain blocks of an optical disk are all used up. CONSTITUTION:The recording region of an optical disk are divided into plural blocks in which a data region 1 and an alternate region 2 are coexisting and a block information region 3 is provided ahead of them. And when one block of the alternate region 2 is all used up, the information, which indicates all sectors that block alternate region are used up, is recorded. By that information, a discrimination is made to know whether each block makes alternate processing or not during a data recording and no error stop is executed even though a recording capacity of a certain block of alternate region 2 is lost and an effective use of other block recording region is made.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk for writing various data and a method for writing data on the optical disk.

[0002]

2. Description of the Related Art Various systems such as a filing system which uses an optical disk as an information recording medium have been developed. However, in such a device, if the recording surface of the optical disk has a large or a large number of defects, At the time of verifying after recording data, each sector is determined to be an abnormal sector and data is recorded in the alternative area. When recording data in the alternative area, if a recording medium in which the data area 1 and the alternative area 2 are completely separated is used as shown in FIG. It takes time and the time for the rotation of the optical disk to stabilize, which leads to a delay in access time.

Therefore, as shown in FIG. 5B, an optical disk management system in which a data area 1 and an alternative area 2 coexist for each block of the optical disk (for example, Japanese Patent Laid-Open No. 2-1).
(See Japanese Patent No. 79971) or as shown in (c) of FIG. 5, an alternative area 2 of a disk-shaped information recording medium such as an optical disk is arranged in the center of the block to replace the stable time of the rotation speed and the data area 1. A disk-shaped information recording medium (for example, see Japanese Patent Laid-Open No. Hei 2-162575) has been proposed that reduces the time required to move to the area 2 and realizes high-speed access.

[0004]

However, in the above-described optical disc management system and disc-shaped information recording medium,
As shown in the flow chart of FIG. 6, data is recorded in an arbitrary sector of the data area 1 for verification, and if recording is OK, next data is recorded in the data area 1. If the recording is NO, the area is jumped to the alternative area 2, and if the alternative area 2 has a recording capacity, the data is recorded and the verification is performed again. However, if the alternative area 2 does not have the recording capacity, an error stop occurs.

In this way, when the recording capacity is exhausted by using all the alternative areas of one block, the recording medium such as the optical disk is judged to be defective, and even if there are other unrecorded blocks remaining, There was a problem that you could not use. The present invention has been made in view of the above points, and an object thereof is to enable the remaining recording blocks to be effectively used even when all the alternative areas of a certain block of an optical disk have been used.

[0006]

In order to achieve the above object, the present invention divides a recording area into a plurality of blocks in which a data area and an alternative area coexist and is formed at the beginning of the recording area. An optical disc having a block information area for writing information is provided. A data writing method using the optical disc,
A method for writing data on an optical disc is also provided, in which when all the alternative areas of one block are used, information indicating that all sectors of the alternative area of the block have been used is recorded in the block information area.

Further, the recording area of the optical disk is divided into a plurality of blocks in which the data area and the alternative area coexist, and when a defective sector occurs in the data area in any one of the blocks, the sector in the alternative area of the block. In the method of writing data on an optical disk using as a substitute sector, the sector format in each block is composed of an address part, a flag part for writing information on whether or not the sector has been recorded, and a data part. When all are used, it is advisable to write the recorded information in the flag part of all the sectors of the remaining data area in the block and newly write the data from the next block.

[0008]

In the optical disk according to the present invention, the recording area is divided into a plurality of blocks in which the data area and the alternative area coexist, and the alternative area of each block is already used in the block information area provided at the head of the block. Since it is possible to write the block information indicating whether or not there is, it becomes possible to access the alternative area that can be used by the block information.

Further, when the above-mentioned optical disk is used and all the sectors of the alternative area of the block are recorded in the block information area when all the alternative areas of one block are used, one block is used. When a large number of defects are concentrated on the disk, the disk does not become defective and other normal blocks can be used.

Further, the recording area of the optical disk is divided into a plurality of blocks in which the data area and the alternative area coexist, and the sector format in each block is written with an address section and a flag section and a data section for writing information as to whether or not the sector has been recorded. When a defective sector occurs in the data area in any of the blocks, the sector in the alternative area of that block is used as the alternative sector.

Then, when all the alternative areas in one block are used, the recorded information is written in the flag part of all the sectors of the remaining data area in the block, and the data is newly written from the next block. In this case, even if a large number of defects are concentrated in one block, the disk does not become defective and the next normal block can be used.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is an explanatory diagram showing a format of a recording area of an optical disc according to the present invention. The recording areas of this optical disc are a data area 1 and an alternative area 2, respectively.
Is divided into a plurality of blocks coexisting with each other, and a block information area 3 for writing block information is provided at the head of the recording area.

The data area 1 is an area for recording various kinds of data, and the alternative area 2 is a sector at the time of verification after recording the data when the recording area (data area 1) of the optical disk is large or has many defects. It is an alternative sector for recording data by judging each sector as an abnormal sector.
The block information area 3 is the alternative area 2 of each block.
Is an area for writing information indicating whether or not has been used.

Next, the data writing method according to the present invention will be described using the optical disc of the format shown in FIG. FIG. 2 is a flowchart showing the write sequence. First, the block information area 3 of FIG. 1 is read (read) to access a sector of a block which has an unrecorded sector in the data area 1 and which can be replaced, and records data. And the result is verified.
Then, it is determined whether the recording is OK (normal).

If the result of this determination is OK, the process returns to the process of recording the next data in another sector of the same block and verifying. If NO (abnormal), it is determined whether or not there is an unrecorded sector in the alternative area 2. If it is judged, if there is, the previously recorded data is recorded again and the process returns to the verification process. If there is no unrecorded sector in the alternative area 2, information indicating that all the sectors in the alternative area of this block have been used is written (recorded) in the block information area 3 and moved to the next block, and recorded first. The recorded data is recorded again, and the process returns to the verification process.

That is, by reading the block information area 3, there is an unrecorded sector in the data area 1 and an unrecorded sector in the alternative area 2, and an alternative processable block is accessed to record data, If there is a verify or recording error, the operation of the alternative process is repeated. When all the sectors of the alternative area 2 have been used, the used information of all the sectors of the alternative area of this block is written in the block information area 3 to access the next block that can be replaced.

In this way, by reading the information in the block information area, it is possible to know whether or not the alternative area of each block has been used. Blocks can be used without waste.

Next, another embodiment of the optical disk data writing method according to the present invention will be described. FIG. 3 is an explanatory diagram showing the sector format of the recording area (data area and alternative area) of each block of the optical disc. The sector format in this embodiment comprises an address part 4, a flag part 5, a data part 6 and a buffer 7.

The address section 4 is an area for storing position data at the time of access for writing or reading data, and the flag section 5 is an area for writing information as to whether or not the sector has already been recorded. The data section 6 is an area for storing various data.

FIG. 4 is a flow chart of a write sequence showing a process for writing data in the recording area having the sector format shown in FIG. First, as in the case of normal data writing, data is recorded in an arbitrary sector of a data area of an arbitrary block and a verify operation is performed. If the recording is OK, an arbitrary sector recording is performed to record data for the next data. Return to processing.

However, if there is a defective sector in the data area where the data is recorded and the recording becomes NO (abnormal), it is judged whether or not there is an unrecorded sector in the alternative area, and if there is, it is recorded first. The data is recorded again, and the process returns to the verification process. If there is no unrecorded sector in the alternative area, all data recorded information is written in the flag section 2 of each sector of the remaining data area, and access is moved to the next block as an apparent recorded sector, The previously recorded data is recorded again, and the process returns to the verification process.

In this way, when all the alternative areas of a block have been used, the recorded information is written in the flag parts of all the unrecorded sectors of the data area of the block, and the data is recorded again from the next block. Therefore, from the next access, the normal write sequence operation can be performed on the block having the unrecorded sector, and even if a large defect is concentrated on one block, the normal recording sequence is not wasted on the other normal blocks. It can be used effectively.

[0023]

As described above, according to the optical disc and the data writing method thereof according to the present invention, the remaining recording blocks can be effectively used even when the alternative area of a certain block of the optical disc has been used up. it can.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a format of a recording area of an optical disc according to the present invention.

FIG. 2 is a flowchart showing a writing sequence when the data writing method according to the present invention is carried out by using the optical disc of the format shown in FIG.

FIG. 3 is an explanatory diagram showing a sector format of a recording area of an optical disc used in another embodiment of the data writing method according to the present invention.

FIG. 4 is a flowchart of a write sequence showing a process for writing data in the recording area of the optical disc having the sector format shown in FIG. 3 by the data writing method of the present invention.

FIG. 5 is an explanatory diagram showing an example in which a format of a recording area of a conventional optical disc is different.

FIG. 6 is a flowchart showing a process of writing data in a recording area of an optical disc by a conventional data writing method.

[Explanation of symbols]

 1 data area 2 alternative area 3 block information area 4 address section 5 flag section 6 data section 7 buffer

Claims (3)

[Claims] 1. An optical disc characterized in that a recording area is divided into a plurality of blocks in which a data area and an alternative area coexist, and a block information area for writing block information is provided at the head of the recording area. . 2. The data writing method using the optical disc according to claim 1, wherein when all the alternative areas of one block are used, all sectors of the alternative area of the block are used in the block information area. A method for writing data on an optical disk, characterized by recording information. 3. A recording area of an optical disc is divided into a plurality of blocks in which a data area and an alternative area coexist, and when a defective sector occurs in a data area in any one of the blocks, a sector in the alternative area of the block. In the method of writing data on an optical disk using as a substitute sector, the sector format in each block is composed of an address part, a flag part for writing information on whether or not the sector has been recorded, and a data part. A method for writing data on an optical disk, characterized in that when all areas are used up, recorded information is written in the flag part of all sectors of the remaining data area in the block, and data is newly written from the next block.