JPH07169197A - Access method for disk shaped recording medium - Google Patents

Abstract

PURPOSE:To access at a high speed to disks having different formats with one driver without changing hard configuration and software by obtaining physical address based on deffective information provided on serial logic address. CONSTITUTION:An optical disk 22 is accessed with a modified CAV. Starting tracks of respective zones, sector numbers the number of sectors and information of DSS positions are recorded in inner and outer circumferenced of an user area Ar 3 with an equal interval by eliminating deffects in the process of producing. At the time of access, a first transformation table is made based on a disk information and deffective information are read-in. Next, a second transformation table is made and when access is prevent from a host 11, a driving part 20 allows a pickup 21 to access to the corresponding position of a target physical address via a servo controller 19 by obtaining a serial logic by reffering to the second transformation table and by obtaining a physical address by reffering to the first transformation table.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc-shaped recording medium access method suitable for application to, for example, an optical disc drive.

[0002]

2. Description of the Related Art Conventionally, for example, an optical disc (MO or WO
Etc., a drive for recording data and reproducing the recorded data has been proposed and has been widely used as a means for holding computer data and audio / visual data.

As a format of such an optical disc, a conventional optical disc is a CAV (Constant).
A so-called zone CAV method is known in which the optical disc is driven by Linear Velocity) and the optical disc is divided into a plurality of zones in the radial direction to record and reproduce data at a clock rate different for each zone.

The applicant of the present invention relates to this zone CAV system,
The proposal has been made earlier (see Japanese Patent Laid-Open No. 5-54540).

The optical disk medium used in the zone CAV method as described above has a lower error rate than the magnetic disk medium. Therefore, ECC (Error Correction Cod), which is stronger than the magnetic disk, is used.
While using e), two types of processing algorithms have been proposed for bad sectors.

One is SSA (Sector Slip).
ing Algorithm) and the other is LR
A (Linear Replacement Algo)
rithm).

SSA is a method of designating and using a sector next to a defective sector as a replacement sector, that is, a sector in place of the defective sector when the disc is initialized at the time of manufacturing the disc. Therefore, the data transfer rate does not almost slow down when writing or reading the data block. Even if the replacement sector cannot be accessed at the first access, it can be accessed when the disk makes one rotation. The SSA information, that is, which sector is a replacement sector of which sector, is generated when the disc is initialized at the time of manufacturing, and is recorded at a predetermined position of the disc.

On the other hand, the LRA is defective, for example, when data is actually written to a disk, the data is read out, and verification is performed to confirm whether the read data and the written data match. This is a method of designating and using a replacement sector of a defective sector in a track defined as a replacement sector area for the sector.
Information of LRA, that is, information such as which sector is a replacement sector of which sector, etc.
It is also recorded during initialization when the disc is used.

The information of SSA and LRA is recorded in a predetermined area of the optical disc. Specifically, an optical disc may have a DDS (Disk Definition S
structure), PDL (Primary Def)
ect List), SDL (Secondary D)
The information "effect list" is recorded.
The DDS is data indicating the data structure of the optical disk, and includes PDL start address data and SDL start address data. Also, PDL
Is information about the sector that has been replaced by the SSA, and SDL is information about the sector that has been replaced by the LRA. Where DDS, SSA and LRA
The information will be collectively referred to as defect information.

These pieces of defect information are located near the innermost circumference and at two locations near the outermost circumference of the optical disc at the time of initialization at the time of manufacturing, when a defective sector is newly detected, or at the time of initialization after manufacturing. It is recorded at a total of 4 places, 2 places on the part.

Then, at the time of recording this defect information, verification is performed at the same time, and if all of the above four locations are defective sectors, this disk is regarded as a defective disk.

Next, an example of a conventional optical disc format will be described with reference to FIGS.

As shown in FIG. 16, the physical sector 0 of the physical track 0 in the physical track Ta1 at the beginning is
DDS # 0, PDL # 0 is recorded in physical sector 1, and SDL # 0 is recorded in physical sector 2. Further, the physical sector 12 of the physical track 1 has DDS # 1 and physical sector 1
3 is recorded in PDL # 1, and physical sector 14 is recorded in SDL # 1.

In the physical track Ta2 of the final portion, the physical sector 0 of the physical track 9998 has a DDS.
# 2, PDL # 2 is recorded in the physical sector 1, and SDL # 2 is recorded in the physical sector 2. Further, DDS # 3 is recorded in the physical sector 12 of the physical track 9999, PDL # 3 is recorded in the physical sector 13, and SDL # 3 is recorded in the physical sector 14.

Here, the track and the sector are referred to as a physical track and a physical sector, respectively, which directly represent the physical position on the optical disk. Where D
DS # 1 to DDS # 3 are information meaning the same, but have different values from DDS # 0 to DDS # 3. This is because the DDS # 0 to DDS # 3 also include information indicating the recording positions of the corresponding PDL # 0 to PDL # 3 and SDL # 0 to SDL # 3, respectively. That is,
This is because, for example, PDL # 0 and PDL # 1 are recorded at different positions.

The same applies to PDL and SDL. Furthermore, although this defect information is recorded at four locations,
This is because if such information is recorded in only one place, the disc cannot be used when the information becomes unreadable.

FIG. 17 is an explanatory diagram showing an example of the above-mentioned PDL. As shown in FIG. 17, the PDL is given to each of the defects # 1 to #n corresponding to the defects # 1 to #n. It is a table composed of a track number (3 bytes) and a physical sector number (1 byte). Here, the physical track number is the physical track number of the defects # 1 to #n, and the physical sector number is the defect # 1 to #n.
Indicates the physical sector number of #n.

FIG. 18 is an explanatory diagram showing an example of the above-mentioned SDL. As shown in FIG. 18, the SDL is given to each of the defects # 1 to #n corresponding to the defects # 1 to #n. A table composed of a track number (3 bytes) and a physical sector number (1 byte), a physical track number (3 bytes) and a physical sector number (1 byte) of a replacement sector given for each defect # 1 to #n. is there.

Next, the operation of the conventional optical disk drive will be described with reference to the flowchart of FIG.

First, in step S1, the host computer outputs a logical address. Then, the process proceeds to step S2. The optical disc drive reads the defect information recorded on the optical disc at the time of disc-in or power-on to generate a conversion table. On the other hand, the address data output from the host computer is supplied to the CPU.

In step S2, a physical address is obtained from the address data based on the conversion table. Then, the process proceeds to step S3. The CPU calculates the physical address for the optical disk based on the logical address supplied from the host computer and the conversion table. Here, this conversion table is for directly converting a logical address from the host computer into a physical address.

In step S3, a physical address is given to the optical disk drive. Then, this processing routine ends. The CPU supplies the physical address obtained in step S2 to the servo controller. The servo controller moves the pickup via the drive unit based on the physical address supplied from the CPU, and causes the pickup to start read and write operations. In the case of reading, the digital data obtained by the pickup is supplied to the host computer.

[0023]

By the way, zone CA
Various applications have been filed regarding the V system, but no implementation has been made yet. Here, when considering the realization of a zone CAV type optical disc device, it is necessary to perform processing on a defective sector as in the conventional case. That is, the address requested by the host computer must be converted into an address on the plate surface of the optical disk, that is, a physical address, in consideration of the defective sector and the number of sectors of one track which is changed for each zone.

Therefore, if the address requested from the host computer is directly converted into the physical address as in the conventional case, the calculation becomes very complicated. Therefore, it is very difficult to program, and a processor with high processing power is required to perform the calculation. Furthermore, if a processor with low processing capability is used, there is a problem that the processing time becomes long.

By the way, when the data to be handled is data requiring a large capacity medium such as audio / visual, there is a demand to increase the capacity without changing the diameter of the optical disk. However, at the present time, even if the capacity could be increased, the compatibility could not be achieved, and there was a problem that a dedicated drive had to be developed.

If the CAV method is adopted and defect information is recorded at two locations near the outermost circumference of the optical disc and two locations near the innermost circumference, a total of four locations will be damaged. There is a high possibility that the defect information recorded near the outermost periphery cannot be read.
Further, the closer to the innermost part of the optical disc, the higher the recording density, so the yield near the innermost part is poor,
As a result, there is a high possibility that the defect information recorded near the innermost circumference cannot be read. That is, there is a problem that the probability that the optical disc will be a defective disc is very high.

Further, an optical disc which has become a defective disc is generally discarded in many cases, which is not preferable from the viewpoint of carefully using resources.

The present invention has been made in consideration of the above points, and provides an access method for a disc-shaped recording medium for easily converting a request address from a host computer into a physical address even in a zone CAV type optical disc apparatus. It is a proposal.

Further, the present invention intends to propose a method for accessing a disc-shaped recording medium which enables the optical disc to be used without being defective even when none of the defect information recorded at four locations on the optical disc can be reproduced. To do.

[0030]

According to a first aspect of the present invention, there is provided a first step of recording defect information on a disc-shaped recording medium, and recording of the defect information at a predetermined physical position on the disc-shaped recording medium. A second step of recording disc information including physical recording position information and representing a physical data structure, a third step of reading the disc information from the disc-shaped recording medium, and the read disc information. Based on the first logical address data, the first table for converting between the second logical address data in which the address corresponding to the defective position is removed and the physical address data. And a fifth step of reading the defect information based on the physical recording position information included in the read disk information, and the defect. A sixth step of generating a second table for converting between the second logical address data and the first logical address data based on the report; Step of converting the logical address data into the second logical address data based on the second table, and the second logical address data from the physical table based on the first table. A disc-shaped recording medium access method comprising: an eighth step of converting to address data; and a ninth step of accessing the disc-shaped recording medium based on the physical address data.

The second invention is the same as the first invention,
A disk-shaped recording provided between the sixth step and the seventh step, which step includes a step of giving an offset corresponding to a predetermined physical position where the defect information is recorded to a request address supplied from the outside. It is a medium access method.

A third invention is the same as the first invention,
The recording format of the disc-shaped recording medium is zone C
This is an access method for a disc-shaped recording medium that is an AV system.

A fourth invention is the same as the first invention,
When the unit area of the disk-shaped recording medium becomes defective, the defect information is a first defect area process that uses a unit area adjacent to the unit area as a unit area instead of the defective unit area. Defect information according to the method, and when the unit area of the disc-shaped recording medium becomes defective, the unit area in the area dedicated to the replacement of the defective area is replaced with the unit of the defective area. This is an access method for a disc-shaped recording medium, which is composed of defect information by a second defect area processing method used as an area.

A fifth invention is the same as the first invention,
In the first step, it is further checked whether or not the recorded defect information is correctly recorded. If the defect information is not correctly recorded, the defect information is again recorded at a position separated by a predetermined distance from the position where the defect information is recorded. This is a method of accessing a disk-shaped recording medium for recording.

A sixth aspect of the invention is the same as the fifth aspect of the invention.
In the first step, when the recorded defect information is not correctly recorded, the disc-shaped recording for recording the information indicating that the defect information is invalid for the defect information that is not correctly recorded. It is a medium access method.

According to a seventh aspect of the present invention, there is provided a disk-shaped recording medium in which defect information based on the first logical address and disk information representing a physical data structure including recording position information of the defect information are recorded. First to read the disc information
And the step of removing the address corresponding to the defective position based on the read disk information.
Second step of generating a first table for converting between the logical address data of the above and the physical address data, and the physical recording position information included in the read disk information. Based on the defect information, a third step of reading the defect information, and a second step of converting between the second logical address data and the first logical address data based on the defect information. A fourth step of generating a table, a fifth step of converting the first logical address data into the second logical address data based on the second table, and a second logical Sixth step of converting the physical address data into the physical address data based on the first table, and accessing the disc-shaped recording medium based on the physical address data. 7 is a disc-shaped recording medium access method comprising the steps of.

An eighth invention is the above-mentioned seventh invention, wherein
A disc-shaped recording provided between the fourth step and the fifth step with a step of giving an offset corresponding to a predetermined physical position where the defect information is recorded to a request address supplied from the outside. It is a medium access method.

The ninth invention is the same as the seventh invention,
The recording format of the disc-shaped recording medium is zone C
This is an access method for a disc-shaped recording medium that is an AV system.

In a tenth aspect based on the seventh aspect, the defect information indicates that, when a unit area of the disc-shaped recording medium becomes defective, a unit area adjacent to the unit area becomes defective. Defect information by the first defect area processing method used as a unit area instead of the unit area, and when the unit area of the disk-shaped recording medium becomes defective, it is provided exclusively for replacement of the defective area. And a defect information by a second defect area processing method in which a unit area in an existing area is used as a unit area instead of a defective area.

[0040]

According to the above-described first invention, the defect information is recorded on the disc-shaped recording medium in the first step, and the defect information is recorded at a predetermined physical position on the disc-shaped recording medium in the second step. The disc information representing the physical data structure including the physical recording position information of the defect information is recorded, the disc information is read from the disc-shaped recording medium in the third step, and read in the fourth step. A first for converting between the second logical address data and the physical address data in which the address corresponding to the defective position is removed compared to the first logical address data based on the disk information. No. 1 table is generated, and in the fifth step, the defect information is obtained based on the physical recording position information included in the read disc information. In the sixth step of reading, a second table for converting between the second logical address data and the first logical address data is generated based on the defect information, In the seventh step, the first logical address data is converted into the second logical address data based on the second table, and in the eighth step, the second logical address data is converted. The physical address data is converted based on the first table, and in the ninth step, the disc-shaped recording medium is accessed based on the physical address data. Thereby, the second logical address data is obtained from the first logical address data including the defect information based on the second table with respect to the request address supplied from the outside, and the second logical address data is obtained. Based on the first table, physical address data can be obtained, and the physical address data can access the disc-shaped recording medium at high speed.

According to the above-mentioned second invention, in the first invention, in the step between the sixth step and the seventh step, the defect information is added to the request address supplied from the outside. The offset corresponding to the predetermined physical position recorded in is given. As a result, high-speed access can be performed except for the recording portion of the defect information.

According to the third aspect of the invention described above, in the first aspect of the invention, the disc-shaped recording medium whose recording format is the zone CAV method is accessed. As a result, the processing at the time of accessing the zone CAV type disc-shaped recording medium can be simplified.

According to the above-mentioned fourth invention, in the above-mentioned first invention, when the unit area of the disk-shaped recording medium becomes defective by using the defect information by the first defect area processing method, The unit area adjacent to the unit area is used as a unit area instead of the defective unit area, and the defect information is used by the second defect area processing method to make the unit area of the disc-shaped recording medium defective. In this case, the unit area in the area provided exclusively for replacing the defective area is used as a unit area instead of the defective area. by this,
Defect processing using the first defective area processing method or the second defective area processing method can be performed based on the defect information generated according to the generation time of the defective area and the like.

According to the above-mentioned fifth invention, in the above-mentioned first invention, in the above-mentioned first step,
It is checked whether the recorded defect information is correctly recorded. If it is not correctly recorded, the defect information is recorded again at a position apart from the position where the defect information was recorded by a predetermined distance. As a result, the defect information can be recorded reliably and accurately.

According to the sixth invention described above, in the fifth invention, in the first step, further,
When the recorded defect information is not correctly recorded, information indicating that the defect information is invalid is recorded with respect to the defect information that is not correctly recorded. As a result, the defect information that was not correctly recorded at the time of recording is not used at the time of reproduction, and the correct defect information can always be used at the time of reproduction.

According to the seventh invention described above, in the first step, the defect information based on the first logical address, and the disk information representing the physical data structure including the recording position information of the defect information are provided. And the second logical address data from which the address corresponding to the defective position has been removed based on the read disk information in the second step. , A first table for conversion with physical address data is generated, and in the third step, the defect information is based on the physical recording position information included in the read disk information. Read
In a fourth step, generating a second table for converting between the second logical address data and the first logical address data based on the defect information,
In the fifth step, the first logical address data is converted into the second logical address data based on the second table, and in the sixth step, the second logical address data is converted. The physical address data is converted based on the first table, and in the seventh step, the disc-shaped recording medium is accessed based on the physical address data. Thereby, the second logical address data is obtained from the first logical address data including the defect information based on the second table with respect to the request address supplied from the outside, and the second logical address data is obtained. Based on the first table, physical address data can be obtained, and the physical address data can access the disc-shaped recording medium at high speed.

According to the above-mentioned eighth invention, in the above-mentioned seventh invention, in the step provided between the fourth step and the fifth step, the defective address for the request address supplied from the outside is given. An offset corresponding to a predetermined physical position where information is recorded is given. by this,
High-speed access can be performed except for the recording portion of the defect information.

According to the ninth invention described above, in the seventh invention, the disc-shaped recording medium having a recording format of the zone CAV system is accessed. As a result, the processing at the time of accessing the zone CAV type disc-shaped recording medium can be simplified.

According to the tenth invention described above, the seventh invention
In the invention, when the unit area of the disc-shaped recording medium becomes defective by using the defect information by the first defect area processing method, the unit area adjacent to the unit area is treated as a defective unit area. When the unit area of the disk-shaped recording medium becomes defective by using the defect information by the second defective area processing method as a substitute unit area, it is provided exclusively for replacing the defective area. The unit area in the existing area is used as a unit area instead of the defective area. Thereby, the defect processing using the first defect area processing method or the second defect area processing method can be performed based on the defect information generated according to the generation time of the defect area and the like.

[0050]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the disc-shaped recording medium access method of the present invention will be described in detail below with reference to FIG.

[First Embodiment]

As shown in FIG. 1, the host 11 is connected to the optical disk drive 12 via an interface circuit 17. In the optical disk drive 12, a bus 14 including an address, data and control bus is connected to a CPU 13, and a RAM 15 for work, a ROM 16 in which programs and various parameters are stored, an interface circuit 18 and a servo controller 19 are connected to the bus 14. Further, the pickup 21 and the interface circuit 17 are connected to the interface circuit 18, and the drive unit 10 and the pickup 11 are connected to the servo controller 19. In the figure, a spindle motor and a mechanism for moving the pickup 21 in the radial direction of the optical disk 22 are omitted.

Since the interface circuit 23 and the recording position information reading unit 24 are related to the second embodiment, respectively, these will be described later with reference to FIGS.
This will be described in detail with reference to FIG.

Before describing the operation of the optical disc drive 12 shown in FIG. 1, the format of the optical disc 22 applied to the present invention will be sequentially described with reference to FIGS.

FIG. 2 shows an example of the case where the optical disk 22 is divided into several areas in the radial direction. Ar1 is the outermost area of the optical disk, and Ar2 is the so-called minus track area. In addition to the position information indicating the position of the information, an area in which disc information indicating the structure of the optical disc (for example, zone) is recorded a plurality of times, A
r3 indicates a user area in which a logical address described later is set.

FIG. 3 is an explanatory diagram showing an example of the zoning format of the optical disk 22. In this example, physical track 0 to physical track 1999 are set as zone 0, physical tracks 2000 to physical track 3999 are set as zone 1, physical tracks 4000 to physical track 5999 are set as zone 2, and physical track 600 is set.
Zones 0 to 7999 are zone 3, and zones 8000 to 9999 are zone 4. Zone 0 is the outermost circumference of the user area Ar3 of the optical disk 22, and zone 4 is the innermost circumference of the user area Ar3 of the optical disk 22. Then, at the time of recording, digital data is recorded at different clock rates so that the recording density is gradually increased from zone 0 to zone 4.

FIG. 4 shows the area Ar of the optical disk 22.
2 is an explanatory diagram showing an example of disc information recorded on the outer peripheral side of the optical disc 22 further than zone 0. FIG. This disk information includes all sectors from the negative track “−1” track to the “−16” track of the area Ar2 (for example, 16 tracks × 25 sectors = 400 sectors).
The same information is recorded in all sectors across all sectors. This disc information is generated and recorded at the time of manufacturing initialization. Therefore, if one of the 400 sectors cannot be read, the disc is considered defective.

Here, since the disc information is recorded a large number of times as compared with the DDS or the like, it is unlikely to be defective. Further, the minus track of the area Ar2 is different from the physical track # 0 of the physical sector 0 of the physical track # 0 of the user area Ar3 of the optical disc 22, for example.
The value (physical track number) gradually decreases from the physical sector 0 to the track closest to the outer circumference, such that the track numbers are "-1" to "-16". In other words, the physical track number is "-16" from the track on the outer circumference side of the optical disk toward the inner circumference,
"-15", ... "-1", "0", "1", ...
..Physical track number "-" assigned as "n"
From 1 "to" -16 ", the above-mentioned disc information is recorded as a minus track of the area Ar2.

FIG. 4 shows an example of this disc information. In this example, the physical start track number of zone 0 is "0
000 ”, the physical start sector number of zone 0 is“ 0 ”
0 ", the number of physical sectors in zone 0 is" 91 ", the physical start track number in zone 1 is" 2000 ", the physical start sector number in zone 1 is" 00 ", the number of physical sectors in zone 1 is" 00 ", zone 2 Physical start track number is "4000", zone 2 physical start sector number is "00", zone 2 physical sector number is "70", zone 3 physical start track number is "6000", zone 3 physical start The sector number is "00", the number of physical sectors in zone 3 is "60", the physical start track number in zone 4 is "8000", the physical start sector number in zone 4 is "00", and the number of physical sectors in zone 4 is "00". 48 ",
It is shown that.

Further, as shown in FIG. 4, the physical track number and the physical sector number indicating the position of the DDS may be recorded. In FIG. 4, the physical track number of DDS # 0 is "0100", the physical sector number of DDS # 0 is "00", and the physical track number and physical sector number of DDS # 1 are "01" and "13", respectively. And so on.

That is, the physical start track number for each zone, the physical start sector number for each zone, and the number of physical sectors for each zone of the optical disk 22 of the format shown in FIG. 3 are recorded. This is information unique to each type and format of the optical disc.

Here, before explaining the defect information,
The serial logical address will be described. The serial logical address is such that track 0 of the physical address and sector 0 are the address 0, and sector numbers are sequentially added to all the physical sectors following it so as to increase by one. Therefore, in the value of this serial logical address,
Values are also included for sectors that are not actually accessed, such as defective sectors.

Next, defect information will be described based on the serial logical address described above. In this embodiment, DD
S is composed of information of 2 bytes, of which 0th byte and 1st byte are IDs and 3rd byte is information indicating the state of the disc. In this information, PDL and SD are included.
Information indicating the first sector of L is included. Further, information such as MSB and LSB is included in the fourth byte and thereafter.

The PDL includes ID and information indicating the serial logical sector number of the defect sector processed by SSA. Further, the SDL includes information on the ID, the serial logical sector number of the defective sector processed by the LRA, and further the serial logical sector number of the replacement sector of the defective sector. Here, the information amount of PDL and SDL differs depending on the number of defect sectors. Therefore, DDS includes PDL and SDL.
It includes information indicating the first sector of the serial logical sector number.

Further, the PDL indicates information of the sector which is replaced by the SSA by the inspection performed at the time of initialization at the time of manufacturing the disc, and the SDL indicates at the time of reading or writing.
The information of the sector replaced by LRA is shown. This SDL information is updated every time a defect is detected during the read / write operation, and is overwritten in the same area of the disc.

FIG. 5 shows an example of PDL. Here, in the present application, unlike the conventional physical address, the logical defect sector number is recorded by the serial logical address as the PDL. Note that 4 bytes are allocated to the information of one logical defect sector number. In this example, a logical PDL including logical defect sector numbers # 1 to #n is shown.

The SDL will be described with reference to FIG. here,
In the present application, unlike the conventional physical address, as the SDL, the logical defect number and the logical replacement sector number are recorded by the serial logical address as in the PDL. In this example, a logical defect sector number of # 1 and a logical defect sector number of this logical replacement sector number to #n and a logical SDL composed of this logical replacement sector number are shown.

7 and 8 show examples of the first and second conversion tables, respectively, which are composed of logical addresses and physical addresses. When the optical disk 22 is mounted on the optical disk drive 12 shown in FIG.
Generates a first conversion table as shown in FIG. 7 from the disk information described in FIG. 4, recognizes the position of the defect information by referring to the first conversion table, and reads the defect information. Then, the second conversion table shown in FIG. 8 is generated based on the read defect information as the disc information.

The first conversion table is a table for converting a serial logical address into a physical address.
The conversion table is a table for converting a request address from the host computer 11 into a serial logical address for conversion in the first conversion table. However, in reality, the second conversion table is a table for converting an address obtained by offsetting a request address from the host computer 11 by a deviation due to a recording area of defect information into a serial logical address. Further, when the spare area in the LRA is provided for each zone, the offset for that area is also given.

It will be understood by comparing FIG. 3 and FIG. 4 with the first conversion table of FIG. 7. In FIG. 7, the physical address “track 0 / sector 0” is assigned to the serial logical address “0”. The physical address is information obtained from the disc information shown in FIG.
This shows the top address of zone 0 shown in FIG. The physical address “track 2000 / sector 0” is assigned to the serial logical address “182000”. The physical address is information obtained from the disc information shown in FIG. 4, and indicates the head address of zone 1 shown in FIG.

The serial logical address "34200"
The same applies to "0", "48200", and "60200", and the head address of each zone is shown.

The second conversion table shown in FIG. 8 is a logical table created after reading the defect information. The "requested logical address" shown in the diagram of this second conversion table is
As described above, the sector number data and the sector length data supplied from the host computer 11 are generated by giving an area used for the defect information, that is, an offset for three tracks. In addition, when the spare sector in LRA is set in each zone, the offset corresponding to that is also given. Note that this offset does not occur when the replacement sector in LRA is set inside all zones.

Here, referring to FIG. 9, an address conversion method using the conversion tables shown in FIGS. 7 and 8 will be described. In FIG. 9, the logical track does not actually exist and is provided for ease of explanation. That is, FIG. 9 shows mapping of each serial logical sector assuming that the number of sectors in one track is 25 for all zones.

Here, in FIG. 9, the logical sector 200
00 is a defective sector, which has been replaced by SSA. Further, the logical sector 30000 is also a defective sector and is replaced by the LRA. Also, logical track 0 to logical track 2 (the total number of sectors is "7
The defect information described above is recorded in each of the 5 "sector) and the logical tracks 9998 to 10000 (total sector number is" 75 "sectors).

The values of the second conversion table shown in FIG. 8 correspond to the states shown in FIG. The requested logical address “0” of the second conversion table is the serial logical address “7”.
5 ". This is the logical track 0 as described above.
To the logical track 2 for 75 sectors of defect information (DDS # 0, PDL # 0, SDL # 0, DDS #
This is because there is an offset of 3 tracks (= 75 sectors) because it is used as an area of 1, PDL # 1, SDL # 1).

Then, the serial logical address corresponding to the requested logical address "1" is "76", and the address conversion is performed in the same manner, and the requested logical address "1999" is obtained.
The serial logical address corresponding to 9 "is" 20074 "
Becomes

As shown in FIG. 9, since the defect x exists in the serial logical address "20075" corresponding to the request logical address "20000", the request logical address "20000" becomes the serial logical address "20076". It is being replaced by SSA. Therefore, as shown in FIG. 8, in the second conversion table, the serial logical address corresponding to the request logical address “20000” is “20076”.

Further, the serial logical address corresponding to the requested logical address "20001" is "20077", and the address conversion is performed in the same manner, and the serial logical address corresponding to the requested converted address "29999" is "30075". "It becomes.

As shown in FIG. 9, since the defect x exists in the serial logical address "30076", the request logical address "30000" is replaced with the serial logical address "249900" by the LRA. Therefore, in the second conversion table, the serial logical address corresponding to the requested logical address “30000” is set to “249900”.

In this case, since the next sector becomes the address next to the defect sector again due to the replacement processing by LRA, the next requested logical address "300" is obtained.
Serial logical address “30077” corresponding to 01 ”
Are stored as a table.

After that, since there is no defective sector, there is no data in the table, but the serial logical address corresponding to the request logical address "30002" is "3."
0078 ", and subsequent values are sequentially set.

The defect information (DDS # 2, PDL # 2, SDL # 2, DDS # 3, DDS # 2, PDL # 2, SDL # 2, DDS # 3,
PDL # 3, SDL # 3) are recorded.

These first and second conversion tables are used as follows. That is, the sector number data and the sector length data supplied from the host 11 are offset by 3 tracks (75 sectors) in the logical track according to the defect information to obtain the requested logical address, and the requested logical address is set to the first logical address. The conversion table 2 converts the serial logical address into the serial logical address, the first conversion table converts the serial logical address into the physical address, and the physical address is used for access. Therefore, the serial logical address of the second conversion table corresponds to the serial logical address of the first conversion table.

Next, with reference to FIGS. 10 and 11, a method of recording the defect information on another sector of the optical disk 22 when the sector for recording the defect information on the optical disk 22 is a defective sector will be described. To do. In FIG.
The vertical direction represents a logical track similar to that shown in FIG. Further, FIG. 11 shows the logical track n + shown in FIG.
0-n + 2 and logical tracks m + 0-m + 2.

In FIG. 10, DA1 indicates the first logical track of the defect information recording area at two locations on the outer peripheral side of the disk, and DB1 indicates the beginning of the defect information recording area at the two inner peripheral side of the disk. Shows the logical track of. DA2-DAn and DB2-DBn are
This is an area used as a replacement area when DA1 and DB1 are defective areas.

That is, this defect information recording area DA
1 or DB1 is a defective area, D
The defect information is recorded in A2 or DB2. Furthermore, DA2
Or, if DB2 is also a defective area, DA3 respectively
Alternatively, defect information is sequentially recorded such that defect information is recorded in DB3.

At this time, the interval I between DA1 and DA2
1, the interval I2 between DA2 and DA3, the interval I4 between DB1 and DB2, and the interval I3 between DB2 and DB3 are equal.
This is because it is sufficient to reproduce the DA2s at equal intervals when reproducing, for example, when the DA1 is a defective area. Since FIG. 10 is based on the serial logical address, the physical intervals on the plate surface of the optical disk are also equal intervals. In addition, it is preferable to overwrite a peculiar ID with respect to the defective area in order to ensure that the area cannot be reproduced.

The defect information also includes SDL information,
Its value is to be updated. Therefore, the defect information is 4
If the number of records is larger than the number of locations, it is necessary to overwrite all locations every time the defect information is updated. Therefore, the time required for updating increases and the recording area for recording user data decreases. Therefore, the defect information is recorded at an appropriate number of four.

[Modification] The above areas DA1 and DB1
If defect information cannot be accurately recorded in all four areas of the areas DA1 and DB1 as a case where defect information is recorded in areas other than the above, defect information is accurately recorded in three of the four areas of the areas DA1 and DB1. When it is not possible to record, when defect information cannot be accurately recorded in two of the four areas of the areas DA1 and DB1, the areas DA1 and DB1 are recorded.
Of the four locations, four selection methods can be adopted when defect information cannot be accurately recorded at one location.

Specifically, assuming that the defect information is recorded from the logical track n, the defect information is recorded using three tracks, so that as shown in FIG. 10, the logical tracks n + 0, n + 1, and n + 2 are recorded. The defect information will be recorded. Similarly, if the defect information is recorded from the logical track m, the defect information is recorded using 3 tracks, so that the defect information is recorded in the logical tracks m + 0, m + 1, and m + 2.

In any case, each area DA1 and DB1,
Defect information is recorded on predetermined tracks of DA2 and DB2 and DAn and DBn in a format as shown in FIG.

At the time of reproduction, the area D is initially displayed.
The defect information is read from A1 and DB1. If the defect information at four locations cannot be read here, the defect information is read from the areas DA2 and DB2, and the areas DAn-1 and DBn-1 (neither is shown in FIG. 4 are shown in this order). Read the defect information.

In this example, in order to prevent the defect information reproduced from the defective area from being used as normal data by mistake, when the defect information is recorded in another area, the defective information is defective. The area is overwritten with an unusual ID such as "FF".

Next, the operation of checking the defective sector and recording the defect information before shipment of the optical disc 22 shown in FIG. 1 will be described with reference to the flowchart shown in FIG. Although this operation may use the optical disk drive 12 shown in FIG. 1, a dedicated device for only checking defect information may be used.

In step S10, the disk is checked. That is, initialization at the time of manufacture is started, and it is checked whether or not there is a defective sector on the disk. This is performed, for example, by recording and reading predetermined data, and checking whether the recorded data matches the read data. At this time, the address of the defective sector is once held in the memory such as the RAM 15. Then, the process proceeds to step S11.

In step S11, defect information is recorded.
That is, the defect information is recorded at four positions, that is, two positions at the outermost position and two positions at the innermost position of the user area Ar3 of the optical disc 22. Here, since the SDL is a list of defective sectors detected after shipment, it is not recorded in this step, and only DDS and PDL are recorded. However, the SDL may also be recorded as a specific value. Then, the process proceeds to step S12.

In step S12, "0" is substituted for n. Then, the process proceeds to step S13. Where n
Is the ID for each recording position of the four defect information
Is.

In step S13, the defect information with ID "n" is read. That is, of the defect information recorded in step S11, the defect information whose ID is "n" is read. Then, the process proceeds to step S14.

In step S14, the read data is held. That is, the defect information read in step S13 is RA
Hold in M15 etc. Then, the process proceeds to step S15.

In step S15, it is determined whether or not it is OK,
If "YES", the process proceeds to step 16, and if "NO", the process proceeds to step S17. Here, "OK" is to determine whether the written defect information and the defect information held in step S14 match, and to determine whether the results match.

In step S16, the variable n is added to the current value by "1". Then, the process proceeds to step S19.

In step S17, a different ID is written. That is, as described above, “OK” in step S15.
Therefore, in order to make sure that the defect information recorded here cannot be used, a peculiar value such as "FF" is written as the ID. Then, the process proceeds to step S18.

In step S18, the defect information is written at a position "I" apart from the predetermined interval. That is, the defect information is newly written at a position "I" apart from the recording position of the defect information where the written defect information and the read defect information do not match.
Then, the process proceeds to step S13 again.

In step S19, it is determined whether n ≧ 4. That is, in this example, the case where the defect information is correctly written at four locations is explained. In this case, n is 4
It is necessary to judge whether or not it is above. And "Y
If "ES", this routine is ended, and if "NO", the process proceeds to step S13 again.

Next, the optical disc drive 1 shown in FIG.
The operation at the time of access 2 will be described with reference to the flowchart shown in FIG.

As described above, the disk information shown in FIG. 4 is recorded in the area Ar1 of the optical disk for each manufactured disk due to the initialization at the time of manufacturing the optical disk and the process described with reference to FIG. The defect information is recorded by.

First, in step S20, the optical disk 2
It is detected whether or not 2 is attached. And step S
In step 21, the disc information is read. Then, the first conversion table is generated based on the disk information read in step S22 and stored in the RAM 15. Then, in step S23, the defect information is read based on the disc information and the like.

Then, the process proceeds to step S24, and step S
At 23, it is determined whether or not the defect information can be read correctly. This is done, for example, by checking the matching of the IDs. If the defect information cannot be read correctly, the process proceeds to step S26, and a position separated by a predetermined interval "I" is searched. Then, in step S23, the defect information is read again, and this loop is repeated until it can be read correctly. And step S
If a positive result is obtained in 24, the process proceeds to step S25, a second conversion table is generated based on the defect information obtained in step S23, and this is stored in the RAM 15. Then, in step S27, the host computer 1
1 to interface circuits 17 and 18 and bus 1
It is detected that the read command or the write command including the sector number data and the sector length data is supplied to the CPU 13 via 4.

Then, in step S28, the requested logical address is obtained based on the sector number data and the sector length data and the offset amount due to the defect information, etc., and the requested logical address is converted into a serial logical address using the second conversion table. Convert. Then, in step S29, the serial logical address is converted into a physical address using the first conversion table. This physical address is supplied to the servo controller 19 in step S30, the drive unit 20 is controlled by the servo controller 19, and the position indicated by the physical address is accessed.

As described above, in this example, the optical disk 22 is zoned and accessed by the modified CAV, and at the time of manufacturing the optical disk 22, the start track number, sector number, sector The disk information including the start track number, sector number, sector number, and DDS position information of each zone excluding the number and the defective area is recorded. Further, defect information is recorded at two locations inside and outside the user area Ar3 of the optical disk 22, respectively. Moreover, a plurality of data are recorded at equal intervals, and at the time of access, a first conversion table is generated based on the disc information, and defect information can be read based on this first conversion table. , The second conversion table is generated, and when there is access from the host 11, Give the serial logical addresses from the request logical address by referring to the second conversion table, then, first
A physical address is obtained from the serial logical address by referring to the conversion table, this physical address is given to the drive unit 20 via the servo controller 19, and the pickup 21 is moved by the drive unit 20 so as to correspond to the target physical address. In the case of an optical disk that is zoned, the speed can be further increased, and even if the format or capacity such as the storage capacity of the optical disk is different, the software and hardware configuration of the optical disk drive 12 can be changed. Needless to say, various media can be supported, and compatibility of media can be achieved.

That is, according to this example, the physical format of the disk depends on the disk itself, and it is not necessary to fix the capacity. Further, it becomes possible to increase the yield in the production of media. In other words, as described above, even if the medium is a defective medium at the present stage, it can be shipped as a medium (for example, about 1 sector) having a capacity slightly smaller than that of a non-defective medium. It is possible to provide low-cost media to consumers, and it is possible to obtain very favorable results from the viewpoint of using resources carefully.

[Second Embodiment]

Next, with reference to FIGS. 14 and 15, when the sector for recording the defect information on the optical disk 22 is a defective sector, another method for recording the defect information on another sector of the optical disk 22. Will be described.

FIG. 14 is a block diagram showing a state in which the optical disk 22 shown in FIG. 1 is housed in a cartridge 30. In FIG. 14, 31 is a window portion, 34 to 38 are holes, and
33 is a bar code printed on the sticker 32, and 40 is a memory. In actual use, the above-mentioned hole 34
~ 38, the barcode 33 or the memory 40 will be used, but for convenience of description, these are shown together with one cartridge 30.

The bar code 33 printed on the sticker 32,
Each of the holes 34 to 38 or the memory 40 holds information indicating at which position defect information is recorded at the time of initialization during manufacturing.

Here, the holes 34 to 38 formed in the disc cartridge 30 shown in FIG. 14, the bar code 33 printed on the sticker 32 attached to the disc cartridge 30, and the usage method of the memory 40 will be described with reference to FIG. The case where the maximum value of DAn and DBn in the figure is set to "6" will be described with reference to FIG.

First, a method of using the holes 34 to 38 formed in the disc cartridge 30 will be described. In this example, the maximum value of DAn and DBn is "6". First,
DA1 and DB when performing disk certification
When defect information is recorded in DA2 and DB2 because 1 cannot be used, among the holes 34 to 38 shown in FIG.
When only the hole 34 is formed and the defect information is recorded in DA3 and DB3 because DA2 and DB2 cannot be used, only the hole 35 is formed among the holes 34 to 38 shown in FIG. The same applies to DA3 to DA6 and DB3 to DB6.

That is, the hole 34 is set to DA1 and DB1.
Hole 35 for DA2 and DB2, hole 36 for D
A3 and DB3, hole 37 for DA4 and DA5,
The holes 38 are used for DA5 and DB5. When the disc cartridge 30 thus constructed is inserted into the optical disc drive 12 shown in FIG. 1, the optical disc drive 12 reads the hole information by the reading unit 24 and the interface circuit 23 shown in FIG. Recognize the recording position of information. In this case, the reading unit 24 serves as a light emitter and a light receiver.

When the presence of holes is represented as "0" and the absence thereof is represented as "1", for example, if the maximum value of DAn and DBn is "8", the maximum number of holes is three. Individual pieces (for example, holes 34, 35 and 36) may be used. That is, two pieces of information are obtained with and without holes, and since there are three holes, information of the cube of 2 (= 8) can be obtained.

Next, a case will be described in which the bar code 33 is printed on the sticker 32, the bar code 33 is printed, and the sticker 32 is attached to the disk cartridge 33. In this case, for example, when the defect information is recorded in DA2 and DB2 when DA1 and DB1 cannot be used, the information "1" is converted into a bar code, and the bar code 33 is printed on the sticker 32.
When the defect information is recorded in the DA3 and the DB3 when the DB2 cannot be used, the information of "2" is converted into a bar code, and the bar code 33 is printed on the sticker 32.

That is, the information "1" indicated by the bar code 33
For DA1 and DB1, information "2" indicated by barcode 33 for DA2 and DB2, information "3" indicated for barcode 33 for DA3 and DB3, information "4" indicated by barcode 33 for DA4 and DB4 , The information “4” indicated by the bar code 33 is for DA5 and DB5, ... The information “n” indicated by the bar code 33 is for DAn and DBn.
When the disc cartridge 30 thus constructed is inserted into the optical disc drive 12 shown in FIG. 1, the optical disc drive 12 reads the information of the bar code 33 by the reading section 24 and the interface circuit 23 shown in FIG. 1, and based on the information. And recognize the recording position of the defect information. In this case, the reading unit 24 becomes a bar code reader.

In the above example, the bar code 33
The case where the label 32 is printed on the sticker 32 and the sticker 32 having the bar code 33 printed thereon is attached to the disk cartridge 30 has been described. However, the bar code 33 may be printed directly on the disk cartridge 30, for example.

Next, the case of using the memory 40 will be described. In this case, the memory 40 is required to be a non-volatile memory such as a flash memory or a RAM with a battery backup. At the time of initialization at the time of manufacturing, the defect information is recorded on the optical disk 22 and its address data is written in the memory 40. And
When the optical disc 22 is inserted into the optical disc drive 12, the optical disc drive 12 uses the reading unit 24 and the interface circuit 23 shown in FIG.
The address data stored in is read and the recording position of the defect information is recognized based on the read address data. In this case, the reading unit 24 becomes a reading circuit.

Since the memory 40 needs only about 3 bits as the information to be stored as described for the holes 34 to 38, it may have a small capacity.

As described with reference to FIG. 4, in addition to the above method, it is also possible to record the information indicating the position of the DDS on the minus track after the first disk certifying in the manufacturing initialization.

Next, taking the case of using the memory 40 as an example, the operation at the time of manufacturing the optical disk 22 will be described with reference to the flowchart shown in FIG.

In step S30, the disc is checked. That is, initialization at the time of manufacture is started, and it is checked whether or not there is a defective sector on the disk. Then, the process proceeds to step S31.

In step S31, defect information is recorded.
Then, the process proceeds to step S32.

In step S32, "0" is substituted for n. Then, the process proceeds to step S33.

In step S33, the defect information whose ID is "0" is read. Then, the process proceeds to step S34.

In step S34, the read data is held. That is, the defect information read in step S33 is held in the memory or the like. Then, the process proceeds to step S35.

In step S35, it is determined whether or not it is OK,
If "YES", the process proceeds to step 36, and if "NO", the process proceeds to step S38.

In step S36, the variable n is added to the current value by "1". Then, the process proceeds to step S39.

In step S38, the defect information is written at a position apart from "I". Then, the process proceeds to step S33 again.

In step S39, it is determined whether n ≧ 4. If "YES", the process proceeds to step S40, and if "NO", the process proceeds to step S33 again.

In step S40, address data representing the recording position of the defect information is stored in the memory 40. Then, this routine ends.

As described above, in this example,
At the time of manufacturing the optical disc 22, disc information including a start track number, a sector number, a sector number, and DDS position information of each zone is recorded except for defective areas, and defect information is further recorded inside and outside the user area Ar3 of the optical disc 22. A plurality of information is recorded at two locations at equal intervals, and the information indicating the recording position of the defect information is recorded in the disk cartridge 30.
When the optical disk 22 is set in the optical disk drive 12 while being held in the bar code 33, holes 34 to 38, notches, memory 40, etc. provided in the optical disk drive 12, defect information is read based on the information such as the above bar code and the read defect Since the conversion table is generated based on the information and the disk information, the speed can be further increased in the case of the zoning optical disk, and even if the format or capacity of the optical disk is different, the optical disk drive It is possible to deal with various media without changing the software and hardware configurations of 12, and compatibility of media can be achieved.

The present invention is not limited to the above-mentioned embodiment, but various modifications can be made.

[0139]

According to the above-mentioned first invention, the defect information is recorded on the disk-shaped recording medium in the first step, and the predetermined physical position of the disk-shaped recording medium is recorded in the second step. Disk information representing the physical data structure including the physical recording position information of the defect information is recorded on the disk, the disk information is read from the disk-shaped recording medium in the third step, and read in the fourth step. To convert between the second logical address data and the physical address data, in which the address corresponding to the defective position is removed based on the above-mentioned disc information, which is different from the first logical address data. In the fifth step, and based on the physical recording position information included in the read disc information, Information is read out, and in a sixth step, a second table for converting between the second logical address data and the first logical address data is generated based on the defect information. Then, in the seventh step, the first logical address data is converted into the second logical address data based on the second table, and in the eighth step, the second logical address is converted. Since the data is converted into the physical address data based on the first table and the disk-shaped recording medium is accessed based on the physical address data in the ninth step, it is supplied from the outside. The second logical address data from the first logical address data including the defect information based on the second table for the request address Optical address data is obtained based on the logical address data based on the first table, and the disk-shaped recording medium can be accessed at high speed by the physical address data, whereby an optical disk using a zone CAV optical disk. An optical disk that can realize high-speed data access by easily converting a request address from a host computer into a physical address in an apparatus and can record more data in a limited area without changing the format of the optical disk, and There is an effect that it is possible to obtain a device that can use an optical disk, and further to effectively use an optical disk having a defective area without discarding it.

According to the second invention described above, the first
In the invention of claim 1, in the step between the sixth step and the seventh step, an offset corresponding to a predetermined physical position in which the defect information is recorded is given to a request address supplied from the outside. Therefore, it is possible to perform high-speed access except for the recording portion of the defect information, which has the effect that the requested data can be accessed at high speed and the access speed can be improved.

According to the third aspect of the invention described above, in the first aspect of the invention, the disc-shaped recording medium having the recording format of the zone CAV system is accessed. It is possible to simplify the processing at the time of accessing the medium, which makes it easy to convert the request address from the host computer into the physical address even when using the zone CAV type disc-shaped recording medium. The calculation processing can be simplified and the access speed can be improved.

According to the above-mentioned fourth invention, in the above-mentioned first invention, when the unit area of the disk-shaped recording medium becomes defective by using the defect information by the first defect area processing method, The unit area adjacent to the unit area is used as a unit area instead of the defective unit area, and the defect information is used by the second defect area processing method to make the unit area of the disc-shaped recording medium defective. In this case, the unit area in the area provided exclusively for replacing the defective area is used as a unit area instead of the defective area.
The defect processing using the first defect area processing method or the second defect area processing method can be performed based on the defect information generated according to the generation time of the defective area, etc. Even if the recording medium has a defective area, the disc-shaped recording medium can be effectively used without being discarded.

According to the above-mentioned fifth invention, in the above-mentioned first invention, in the above-mentioned first step, further,
It is checked whether the recorded defect information is recorded correctly, and when it is not recorded correctly, the defect information is recorded again at a position separated by a predetermined distance from the position where the defect information is recorded. Can be recorded reliably and accurately, and by doing so, the processing based on the defect information can be reliably and accurately performed, so that the reliably and accurately requested data can be reproduced. is there.

According to the sixth invention described above, in the fifth invention, in the first step, further,
When the recorded defect information is not recorded correctly, the information indicating that the defect information is invalid is recorded with respect to the defect information that is not recorded correctly, so it was not recorded correctly at the time of recording. The defect information is not used at the time of reproduction, and the correct defect information can always be used at the time of reproduction. By doing so, the processing based on the defect information can be performed reliably and accurately, so that the request can be made reliably and accurately. It is possible to reproduce the generated data, and it is possible to prevent a defect such as reproducing data having an address different from the request address due to the incorrect use of defect information that should not be used.

According to the seventh invention described above, in the first step, the defect information based on the first logical address, and the disk information representing the physical data structure including the recording position information of the defect information are provided. And the second logical address data from which the address corresponding to the defective position has been removed based on the read disk information in the second step. , A first table for conversion with physical address data is generated, and in the third step, the defect information is based on the physical recording position information included in the read disk information. Read
In a fourth step, generating a second table for converting between the second logical address data and the first logical address data based on the defect information,
In the fifth step, the first logical address data is converted into the second logical address data based on the second table, and in the sixth step, the second logical address data is converted. Since the physical address data is converted based on the first table and the disk-shaped recording medium is accessed based on the physical address data in the seventh step, a request supplied from the outside For the address, the second logical address data is obtained from the first logical address data including the defect information based on the second table, and the second logical address data is physically based on the first table. Since the physical address data is obtained and the disk-shaped recording medium can be accessed at high speed by this physical address data, zone C Even in an optical disc device using a V type optical disc, high-speed data access can be realized by easily converting a request address from a host computer into a physical address, and more data can be obtained in a limited area without changing the optical disc format. There is an effect that the optical disk capable of recording the data can be used without changing the hardware configuration of the device.

According to the eighth invention described above, in the seventh invention, in the step provided between the fourth step and the fifth step, the defective address for the request address supplied from the outside is defective. Since it is designed to give an offset for a predetermined physical position where information is recorded,
It is possible to perform high-speed access except for the portion where the defect information is recorded, and this has the effect that requested data can be accessed at high speed and the access speed can be improved.

According to the ninth invention described above, in the seventh invention, since the disc-shaped recording medium whose recording format is the zone CAV system is accessed, the disc-shaped recording of the zone CAV system is performed. It is possible to simplify the processing at the time of accessing the medium, which makes it easy to convert the request address from the host computer into the physical address even when using the zone CAV type disc-shaped recording medium. The calculation processing can be simplified and the access speed can be improved.

According to the tenth invention described above, the seventh invention
In the invention, when the unit area of the disc-shaped recording medium becomes defective by using the defect information by the first defect area processing method, the unit area adjacent to the unit area is treated as a defective unit area. When the unit area of the disk-shaped recording medium becomes defective by using the defect information by the second defective area processing method as a substitute unit area, it is provided exclusively for replacing the defective area. Since the unit area in the existing area is used as a unit area instead of the defective area, the first defect area processing method based on the defect information generated according to the generation time of the defective area and the like. Alternatively, it is possible to perform a defect treatment using the second defect area treatment method described above, and thereby, even if a defect area is generated in the disc-shaped recording medium, There is an effect that can be effectively used without discarding a recording medium.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an example of an optical disk drive to which an embodiment of an access method for a disk-shaped recording medium of the present invention is applied.

2 is an explanatory diagram showing an example of a format of an optical disc used in the optical disc drive shown in FIG. 1. FIG.

FIG. 3 is an explanatory view showing an image of a physical track in the case of zoning for explaining an embodiment of an access method of a disc-shaped recording medium of the present invention.

FIG. 4 is an explanatory diagram showing an example of disc information used for explaining an embodiment of an access method of a disc-shaped recording medium of the present invention.

FIG. 5 is an explanatory diagram showing an example of a PDL for explaining an embodiment of an access method for a disc-shaped recording medium of the present invention.

FIG. 6 is an explanatory diagram showing an example of an SDL used for explaining an embodiment of an access method for a disc-shaped recording medium of the present invention.

FIG. 7 is an explanatory diagram showing an example of a first conversion table used for explaining an embodiment of an access method for a disc-shaped recording medium of the present invention.

FIG. 8 is an explanatory diagram showing an example of a second conversion table used for explaining an embodiment of an access method for a disc-shaped recording medium of the present invention.

FIG. 9 is defect information in a logical track used for explaining an embodiment of an access method for a disc-shaped recording medium of the present invention;
It is explanatory drawing for demonstrating the state of a defect.

FIG. 10 is an explanatory diagram showing a configuration of a logical track used for explaining an embodiment of an access method of a disc-shaped recording medium of the present invention.

FIG. 11 is an explanatory diagram showing the position of defect information in a logical track for explaining an embodiment of an access method for a disc-shaped recording medium of the present invention.

FIG. 12 is a flow chart for explaining an operation at the time of manufacturing for explaining an embodiment of an access method for a disk-shaped recording medium of the present invention.

FIG. 13 is a flow chart for explaining an operation at the time of access of the embodiment of the access method for the disc-shaped recording medium of the present invention.

FIG. 14 is a configuration diagram showing some examples of disc cartridges used for explaining a second embodiment of the disc-shaped recording medium access method of the present invention.

FIG. 15 is a flowchart for explaining an operation at the time of manufacturing, which is used for explaining the second embodiment of the access method for the disc-shaped recording medium of the present invention.

FIG. 16 is an explanatory diagram for explaining a recording position of defect information for explaining an example of a conventional disc-shaped recording medium access method.

FIG. 17 is an explanatory diagram showing an example of a PDL for explaining an example of a conventional disc-shaped recording medium access method.

FIG. 18 is an explanatory diagram showing an example of an SDL used for explaining an example of a conventional disc-shaped recording medium access method.

FIG. 19 is a flowchart for explaining the operation of the optical disc drive, which is used for explaining an example of a conventional disc-shaped recording medium access method.

[Explanation of symbols]

 11 host 12 optical disk drive 22 optical disk 30 disk cartridge 33 bar code 34, 35, 36, 37, 38 hole 40 memory

Claims (10)

[Claims] 1. A first step of recording defect information on a disk-shaped recording medium, and physical data including physical recording position information of the defect information at a predetermined physical position of the disk-shaped recording medium. A second step of recording disc information representing a structure, a third step of reading the disc information from the disc-shaped recording medium, and a first logical address data based on the read disc information. A fourth step of generating a first table for converting between the second logical address data and the physical address data in which the address corresponding to the defective position is removed in comparison with The fifth step of reading the defect information based on the physical recording position information included in the issued disc information, and the second theory based on the defect information. Second step for generating a second table for converting between the first logical address data and the first logical address data; and the first logical address data for the second table. A seventh step of converting the second logical address data based on the above, and an eighth step of converting the second logical address data into the physical address data based on the first table, A ninth step of accessing the disc-shaped recording medium based on the physical address data, the method for accessing the disc-shaped recording medium. 2. A step of giving an offset corresponding to a predetermined physical position where the defect information is recorded to a request address supplied from the outside between the sixth step and the seventh step. The method for accessing a disk-shaped recording medium according to claim 1, wherein the method is provided. 3. The method for accessing a disc-shaped recording medium according to claim 1, wherein the recording format of the disc-shaped recording medium is a zone CAV method. 4. The defect information is such that, when a unit area of the disc-shaped recording medium becomes defective, a unit area adjacent to the unit area is used as a unit area instead of the defective unit area. When the defect information according to the defect area processing method of 1 and the unit area of the disk-shaped recording medium becomes defective, the unit area in the area provided exclusively for replacing the defective area becomes defective. 2. The disc-shaped recording medium access method according to claim 1, wherein the access information is comprised of defect information obtained by a second defect area processing method used as a unit area instead of an area. 5. In the first step, further,
It is checked whether the recorded defect information is recorded correctly, and when it is not recorded correctly, the defect information is recorded again at a position apart from the position where the defect information is recorded by a predetermined distance. 1. A method for accessing a disc-shaped recording medium according to 1. 6. In the first step, further comprising:
6. The disk shape according to claim 5, wherein when the recorded defect information is not correctly recorded, information indicating that the defect information is invalid is recorded with respect to the defect information which is not correctly recorded. How to access the recording medium. 7. The disc information is recorded from a disc-shaped recording medium on which defect information based on a first logical address and disc information representing a physical data structure including recording position information of the defect information are recorded. To convert between the first step of reading and the second logical address data in which the address corresponding to the defective position is removed based on the read disk information, and the physical address data. A second step of generating the first table of the above, a third step of reading the defect information based on the physical recording position information included in the read disc information, and a third step of reading the defect information. And a fourth step of generating a second table for converting between the second logical address data and the first logical address data; A fifth step of converting the logical address data into the second logical address data based on the second table; and the physical step of converting the second logical address data into the second logical address data based on the first table. Disc-shaped recording medium access method comprising a sixth step of converting the disc-shaped recording medium into physical address data, and a seventh step of accessing the disc-shaped recording medium based on the physical address data. 8. A step of giving an offset corresponding to a predetermined physical position in which the defect information is recorded to a request address supplied from the outside between the fourth step and the fifth step. The method for accessing a disk-shaped recording medium according to claim 7, wherein the method is provided. 9. The method for accessing a disk-shaped recording medium according to claim 7, wherein the recording format of the disk-shaped recording medium is a zone CAV method. 10. The defect information is such that, when a unit area of the disk-shaped recording medium becomes defective, a unit area adjacent to the unit area is used as a unit area instead of the defective unit area. When the defect information according to the defect area processing method of 1 and the unit area of the disk-shaped recording medium becomes defective, the unit area in the area provided exclusively for replacing the defective area becomes defective. 8. The disc-shaped recording medium access method according to claim 7, wherein the disc-shaped recording medium is constituted by defect information by a second defect area processing method used as a unit area instead of an area.