JP2000298936A - Information processor and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an information recording and reproducing device and a recording medium which prevent a hindrance caused by not using a logical address zone even in the case that access to a zone is inhibited with respect to the recording medium which has the recording area divided into plural zones each of which consists of a user area for data recording and a spare area which is used for substitution processing at the time of the occurrence of a defect in a sector of the user area. SOLUTION: A DDS(disk definition structure) 50 is held in a storage part of the information recording and reproducing device, and zone address conversion information is provided for each zone. This information is conversion information to convert a given logical address to a new logical address and is stored as an offset value to be added to the given logical address. When a logical address is given, this offset value is added to calculate a new logical address, and a physical address corresponding to this logical address is calculated. Information of this DDS is recorded in the recording medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recording and reproducing information on and from a recording medium, and to a recording medium such as a magneto-optical disk.

[0002]

2. Description of the Related Art In a recording medium such as a magneto-optical disk, a recording / reproducing position of a sector or the like can be identified by an address generally called a physical address. When a host computer such as a personal computer specifies the sector, an address called a logical address that does not depend on the physical structure of the disk is used. There is a one-to-one correspondence between the logical address and the physical address.

That is, when a certain host computer attempts to access a certain sector on a certain disk, the host computer notifies the drive of the disk by the logical address. Then the drive
This logical address is converted into a physical address, and a desired sector is accessed using the physical address.

Here, the following magneto-optical disks exist as recording media. That is, the recording area is composed of a plurality of zones, and each zone includes a user area and a spare area. The user area includes a plurality of sectors and is an area for recording data. The spare area is an area composed of sectors for replacing the sector when a defect occurs in the sector of the user area. The spare area is used for recording data in place of a defect when a certain sector in the user area is defective. When performing this alternative processing, DDS (Disk Definit
SDL (Secondary D) existing in the ion structure area
The information that replaces the physical address of the defective sector with the physical address of the replacement sector is recorded in the efect list. In other words, when a logical address indicating a defective sector is issued from the host computer, the drive searches the DDS area, converts the logical address into a physical address of an alternative sector, and Access a physical address. The above method is a so-called linear replacement method. However, there is also a slipping replacement method in which, when a defect is detected in a sector, a physical address is slipped to perform processing.

[0005]

Here, in a state where all the spare areas in a certain zone have been recorded and cannot be used,
When a defective sector occurs in that zone, a spare area of another zone may be used. But,
If defects are concentrated in a certain zone and a spare area in another zone is used, access efficiency will be degraded. Therefore, when all the spare areas in a certain zone are already recorded and cannot be used, access to the zone is prohibited to improve access efficiency.

However, if access to a certain zone is prohibited, the logical address space of the sector belonging to that zone becomes unavailable to the host computer, which may hinder the operation of the application executed on the host computer. .

Accordingly, the present invention provides a recording / reproducing apparatus and a recording medium which can prevent a problem caused by the inability to use a logical address space even when access to a certain zone on the recording medium is prohibited. The purpose is to:

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and firstly, an information processing apparatus for recording and / or reproducing information on a recording medium. And a conversion information generating unit that generates conversion information for converting a given logical address into a new logical address. In the information processing apparatus having the first configuration, the logical address given by the conversion information generated by the conversion information generation unit is converted to a new logical address. As a result, even when the recording position of a certain physical address on the recording medium is made unusable, when accessing with the logical address corresponding to the physical address, the physical address corresponding to the logical address is converted to a new logical address. Is calculated, it is possible to prevent the logical address from becoming inaccessible.

[0009] Second, an information processing apparatus for recording and / or reproducing information on and from a recording medium, wherein a correspondence between a logical address and a physical address for accessing a predetermined position on the recording medium is provided. A storage unit that stores address correspondence information that is information indicating the following: a conversion information generation unit that generates conversion information for converting a given logical address to a new logical address; And a control unit for performing conversion to a new logical address in accordance with the conversion information and calculating a physical address in accordance with the new logical address and the correspondence information.

In the information processing apparatus having the second configuration, the conversion information generating section generates conversion information for converting a given logical address to a new logical address. Then, since the storage unit stores the correspondence information indicating the correspondence between the logical address and the physical address for accessing the predetermined position of the recording medium, the control unit stores the new logical address. The physical address is calculated according to the above and the correspondence information. Thereby, even if the recording position of a certain physical address on the recording medium is disabled,
When accessing with a logical address corresponding to the physical address, the physical address is converted to a new logical address and the physical address corresponding to the logical address is calculated, so that it is possible to prevent the logical address from becoming inaccessible.

Thirdly, a recording area of a recording medium is divided into a plurality of zones, and each zone is used as a spare area which is used as a substitute for a data recording data area and a sector in the data area when a defect occurs. And an information processing apparatus for recording and / or reproducing information, wherein address correspondence information which is information indicating correspondence between a logical address and a physical address for accessing a predetermined position of a recording medium, and A storage unit for storing zone correspondence information that is information indicating the correspondence between the logical address and the zone, and a conversion unit that generates conversion information for converting all logical addresses belonging to a certain zone into a new logical address. An information generator,
When a certain logical address is given, a zone corresponding to the logical address is detected by the zone correspondence information, the logical address is converted to a new logical address according to the conversion information, and a new logical address is further converted according to the conversion information. And a control unit that converts the logical address into a logical address and calculates a physical address according to the new logical address and the address correspondence information.

In the information processing apparatus of the third configuration, conversion information for converting all logical addresses belonging to a certain zone into new logical addresses is generated. Then, since the storage unit stores zone correspondence information which is information indicating the correspondence between the logical address and the zone, the control unit, when given a certain logical address, A corresponding zone is detected from the zone correspondence information, and if conversion information has been generated for that zone, the zone is converted to a new logical address according to the conversion information. Then, a physical address is calculated according to the new logical address and the address correspondence information.
Thereby, even when the recording position corresponding to a certain zone on the recording medium is made unusable, when accessing with the logical address corresponding to the zone, the physical address corresponding to the logical address is converted to a new logical address. Is calculated, it is possible to prevent the logical address from becoming inaccessible.

Fourthly, in the third configuration, the storage unit is provided with a conversion information storage area for storing the conversion information for each zone, and the conversion information generation unit is provided with a conversion information generation unit. When the information is generated, the control unit updates predetermined conversion information in the conversion information storage area.

Fifth, in the third or fourth configuration, when the conversion information generation section generates conversion information for a certain zone, the information processing apparatus may store the conversion information in the zone. The data is moved to another zone and recorded. Thereby, the already recorded data can be protected.

Sixth, in any one of the third to fifth configurations, when the conversion information generating unit disables access to a certain zone, the conversion information generating unit generates conversion information for the zone. It is characterized by the following. As a result, even when a certain zone is made inaccessible, it is possible to prevent trouble due to inaccessibility of the logical address space.

[0016] A seventh feature is that, in the sixth configuration, when the spare area of a certain zone has already been recorded, the information processing apparatus makes the zone inaccessible.

Eighth, in any one of the third to seventh structures, the conversion information is an offset value for adding to a value indicating a logical address, and For subsequent zones, the conversion information is updated by adding the offset value.

Ninth, in any one of the first to seventh configurations, the conversion information is an offset value for adding to a value indicating a logical address.

In a tenth aspect, in any of the first to ninth configurations, the information processing apparatus records the conversion information on a recording medium at a predetermined timing. Thereby, the conversion information can be read from the disk and the logical address can be changed according to the conversion information.

An eleventh feature is that, in any one of the first to tenth configurations, the information processing apparatus reads the conversion information recorded on a recording medium at a predetermined timing. I do.

A twelfth aspect is a recording medium for recording information, characterized in that conversion information for converting a given logical address to a new logical address is recorded. Thereby, this conversion information is read,
By changing the logical address in accordance with the conversion information, it is possible to prevent trouble due to inability to access a certain logical address space.

A thirteenth aspect is a recording medium for recording information, in which a recording area is divided into a plurality of zones, and each zone has a defect in a data recording data area and a sector in the data area. And conversion information for converting a given logical address to a new logical address, and converting all logical addresses belonging to a certain zone to a new logical address. The conversion information for performing the conversion is recorded. As a result, by reading out the conversion information and changing the logical address according to the conversion information, it is possible to prevent a trouble due to the inability to access a certain logical address space.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, an information recording / reproducing apparatus A as an information processing apparatus of the present invention includes an input circuit 10, a magnetic head driving circuit 12, a magnetic head 1
4, an optical head 16, a reproduced signal amplifying circuit 18, a low-pass circuit 20, a decoder 22, an ECC / EDC processing circuit 24, a storage unit 28, a storage unit 30, and an output circuit 3.
2, a servo circuit 34, a spindle motor 36, a clock generation circuit 38, and a controller 40.

Here, the input circuit 10 receives the video / audio signal and encodes the video / audio signal into digital data. The input circuit 10 also controls the bit rate at the time of variable length coding. Further, the magnetic head driving circuit 12 drives the magnetic head 14 according to a signal input from the input circuit 10. Magnetic head 14
Is used to record data, and magnetizes the recording film of the disk 5. The optical head 16 is used for recording and reproducing data, and receives the reflected light of the laser light applied to the disk 5. The disk 5 includes a magneto-optical disk.

The reproduction signal amplifying circuit 18 amplifies the signal from the optical head 16. Further, the low-pass circuit 20 integrates the signal amplified by the reproduction signal amplification circuit 18. The decoder 22 is provided with the clock generation circuit 38.
And decodes the signal modulated at the time of recording in synchronization with the clock sent from. The ECC / EDC processing circuit 24
Error correction is performed on the signal decoded by the decoder 22. That is, ECC (Error Correcting Code) processing and EDC (Error Detecting Code) processing are performed.

The storage unit 28 stores information, and in particular, a DMA (Defect Manag) as management information.
ement area) is stored. In this DMA, a DDS 50 is stored. As shown in FIG. 2, the DDS 50 stores zone address translation information and zone management information for each zone following the information of the DDS header. (Primary Defect List) address and SDL (Secondary Defect List) address are stored.

The zone address conversion information is information for converting the correspondence between the physical address and the zone address in units of zones, and uses, for example, an offset value for a logical address. Normally, this offset value is 0. This zone address translation information
This corresponds to the conversion information. Details will be described later.

Also, the zone management information includes "Check for defects in sectors in zone (Certificatio)".
n) "or" Certification "
Information such as "whether processing is being performed" and "whether the zone is available" are recorded.

The address of the PDL is PDL.
Is recorded. Note that the physical address of the defective sector is recorded in this PDL. Also, the correspondence between the physical address of the defective sector and the physical address of the sector in the spare area which has replaced the defective sector is recorded in the address of the SDL.

The correspondence between the physical address and the logical address when the substitution process is not performed is a one-to-one correspondence as shown in FIG. That is, a conversion formula indicating the relationship between the logical address and the physical address is predetermined and stored in the storage unit 28. The conversion formula corresponds to the address correspondence information. The storage unit 28 also stores zone correspondence information indicating the relationship between a certain logical address and the zone to which the logical address belongs.

The storage unit 30 also stores information in the same manner. This storage unit 30 stores video and audio information to be reproduced. The storage units 28 and 30
Is actually constituted by a memory.

The servo circuit 34 rotates the spindle motor 36 at a predetermined number of revolutions in accordance with a signal and a clock sent from the reproduction signal amplifying circuit 18.
The objective lens in the optical head 16 is controlled to perform tracking servo and focus servo.

The controller 40 controls the operation of each section of the information recording / reproducing apparatus A. Particularly, in a predetermined case, the address conversion information in the DDS 50 is generated and further rewritten. Details will be described later.
The controller 40 functions as the conversion information generation unit and the control unit.

The host computer B is connected to the input circuit 10 and the output circuit 32. When the host computer B attempts to access a predetermined address of the disk 5, the information of the logical address is read from the information recording / reproducing apparatus A.
Output to

It is assumed that the information recording / reproducing apparatus A performs slipping replacement as defect management. In other words, when a defect is detected in a sector as a unit for recording and reproduction, the physical address for recording and reproduction is slipped, that is, the next logical address is skipped and the next logical address is given to the sector where the next defect is not detected. is there. The recording area of the disk 5 is divided into a plurality of zones as shown in FIGS. 6 and 7, and each zone is provided with a user area and a spare area.

The operation of the information recording / reproducing apparatus A having the above configuration will be described. First, the disc 5 is loaded into the information recording / reproducing device A
Set to. Then, the DDS 50 is already on the disk 5.
When the information of the DDS 50 is stored, the information of the DDS 50 is read from the optical head 16 and stored in the storage unit 28.

Here, if the above-described substitution processing is not performed, the correspondence between the physical address and the logical address is one-to-one, so that a certain logical address from the host computer B is used for information recording / reproducing. When sent to the device A, the controller 40 detects the corresponding physical address according to the conversion formula of the logical address and the physical address stored in the storage unit 28, and outputs the information of the physical address. That is, when recording is performed, the information of the physical address is sent to the magnetic head drive circuit 12 and the servo circuit 34. The magnetic head drive circuit 12 and the servo circuit 34
A predetermined position on the disk 5 is accessed according to the transmitted information on the physical address. When performing reproduction, information of the physical address is sent to the servo circuit 34.

When a defect is found in a sector to be reproduced during reproduction, address information of the sector is registered in the PDL in a state of a physical address. Then, in the subsequent recording, if the address information of the target sector which is the recording target sector is registered in the PDL, a slip process is performed. That is, recording is not performed on the target sector, and recording can be performed on the next sector as the target sector. That is, if the address information is not registered in the PDL, recording is performed on that sector. The slipping replacement is performed as described above.

In other words, as shown in FIG. 8, if the first sector as the physical address (the first sector is 0) and the fourth sector are defective, the data to be recorded in the first sector is used. Is recorded in the second sector. Also, 4
Data to be recorded in the sixth sector is recorded in the sixth sector. Data to be recorded in the (n-1) th sector is recorded in the first sector of the spare area.

It should be noted that slide information as information for sliding the physical address is written in advance. That is, in the example of FIG. 8, for the physical address of the second sector from the first (first 0) sector, information for sliding one physical address is written, and the fourth and subsequent sectors are written. As for the physical address of the sector, information for sliding two physical addresses is written. Thus, for example, when an instruction to access the logical address of the first sector is issued, the instruction is converted into a physical address according to the above conversion formula indicating the relationship between the logical address and the physical address. A second physical address shifted by one is calculated, and the second physical address is actually output to the servo circuit 34 and the magnetic head drive circuit 12.

During the above processing, all the spare areas of a certain zone may be recorded. The processing in that case will be described below using the flowchart of FIG.

First, it is detected whether or not all the spare areas of a certain zone have been used, that is, recorded. Then, when all the spare areas of a certain zone have been used, the processing after step S11, that is, the processing for disabling the zone is performed.

That is, first, since the zone is made unusable, data recorded in the zone is moved (S11). This is performed by saving the data to another recordable zone in order to protect the recorded data. At this time, a logical address corresponding to the physical address of the movement destination is newly given to the moved data. That is, when trying to access the moved data, the access is performed using the new logical address.

Next, the unusable zone is made unusable (S12). Specifically, since information as to whether or not a zone is available is recorded in the zone management information, this information is made unusable.

Further, the zone address conversion information is updated (S13). That is, a process of updating the offset value which is normally 0 in the zone address conversion information is performed. Specifically, it is performed as follows.

That is, it is assumed that each zone from the 0th zone to the Nth zone is provided in the recording area for a certain disk 5. It is assumed that all the spare areas have been recorded in the zeroth zone and cannot be used. Here, it is assumed that ten logical addresses are assigned to each zone. That is, it is assumed that logical addresses 0 to 9 are given to the 0th zone, and logical addresses 10 to 19 are given to the first zone.

When the 0th zone cannot be used, the controller 40 generates information of a value corresponding to the number of logical addresses of one zone, that is, information of a value of +10 as conversion information. . Then, the controller 40 sets the offset value in the zone address information of the zeroth zone in FIG.
Add 0. That is, the offset value of the zone address information of the 0th zone is +10. Accordingly, +10 is added to the offset value in the zone address conversion information for the zones after the zeroth zone.

In this manner, for example, when an instruction to access the logical address 5 is input from the host computer B, the controller 40
First, the zone to which the logical address belongs is detected according to the zone correspondence information. In this case, the zone to which the logical address 5 belongs is the zeroth zone. And the storage unit 2
8 to read the zone address conversion information for the 0th zone. Then, +1 is added to the zone address conversion information of the 0th zone.
Since the offset value of 0 is stored, the controller 40 adds this offset value +10 to the value 5 of the designated logical address to make +15. Then, the controller 40 inputs the value of +15 into the conversion formula between the logical address and the physical address, and outputs the physical address obtained therefrom. That is, during recording, the signal is output to the magnetic head drive circuit 12 and the servo circuit 34, while during reproduction, the signal is output to the servo circuit 34.

By doing so, the first zone is apparently the zeroth zone, and the logical address space from 0 to 9 can be accessed. In other words, conventionally,
If the zone 0 is disabled, the logical addresses from 0 to 9 cannot be accessed. However, in the case of the present embodiment, access is possible. As described above, when the process of updating the zone address conversion information for the 0th zone is performed, the relationship between the logical address and the physical address becomes as shown in FIG.

When the second zone is disabled in addition to the zeroth zone, the offset value of the zone address translation information is updated for the second and subsequent zones. That is, the offset value is added by +10. That is, when the zone 0 and the zone 2 are disabled, the offset value of the zone address conversion information of the zone 0 and the zone 1 becomes +10, and the zone address conversion from the zone 2 to the zone N is performed. The offset value of the information is +20. Thus, for example, when there is an instruction to access 25 logical addresses,
The zone address conversion information of the zone to which the logical address belongs, that is, the second zone is read, and the stored offset value +20 is added to obtain 45. Then, a physical address corresponding to the 45 logical addresses is calculated and output. Note that the above 5, 15, 2
A logical address such as 5 is actually indicated by information of 1 and 0.

At a predetermined timing, for example, when the disk 5 is removed from the information recording / reproducing apparatus A or when a series of processing is completed, the information of the DDS 50 is written to the management area of the disk 5. Note that this DD
If the information of S50 has been written on the disk 5, the information of the DDS 50 is updated.

In the above description, the case where all the spare areas of a certain zone have been recorded has been described as a trigger for performing the processing of step S11 and the subsequent steps in FIG. 3, but other cases are also possible. For example, the number of defective sectors detected in the zone may be equal to or more than a predetermined number.

In the above description, the case where the spare area becomes full by performing the slipping replacement is taken as an example. However, the case of the linear replacement may be adopted. In other words, as shown in FIG. 9, in the linear replacement, when the first and fourth sectors have defects, a replacement sector for those defective sectors is placed in the spare area.
In this case, the information of the physical address of the defective sector and the information of the physical address of the replacement sector are stored in the SDL in association with each other. Also in this case, the processing is performed as in the flowchart shown in FIG. That is, it is determined whether or not the spare area of each zone is full, and when it is full, the processing from step S11 is performed.

In the above description, video and audio information has been described as an example of information to be recorded and reproduced.
Other information such as image information and document information may be used.

[0055]

According to the information processing apparatus according to the present invention,
The given logical address is converted to a new logical address by the conversion information, and converted to a physical address by the new logical address so that the physical address can be accessed. Can be prevented. In particular, by setting the conversion information for each zone, it is possible to prevent the inconvenience of disabling a certain zone and making the logical address space inaccessible.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram showing a configuration of a DDS.

FIG. 3 is an explanatory diagram showing an operation of the information recording / reproducing device according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a correspondence between a normal logical address and a physical address.

FIG. 5 is an explanatory diagram showing a correspondence between a logical address and a physical address when the zone address conversion information is updated.

FIG. 6 is an explanatory diagram showing a configuration of information recorded on a disc.

FIG. 7 is an explanatory diagram showing a configuration of a recording area on a disc.

FIG. 8 is an explanatory diagram illustrating slipping replacement.

FIG. 9 is an explanatory diagram illustrating a linear replacement.

FIG. 10 is an explanatory diagram illustrating a linear replacement.

[Explanation of symbols]

 A information recording / reproducing device B host computer 12 magnetic head drive circuit 28, 30 storage unit 34 servo circuit 40 controller

Claims (13)

[Claims] 1. An information processing apparatus for recording and / or reproducing information on and from a recording medium, comprising: a conversion information generating unit for generating conversion information for converting a given logical address into a new logical address. An information processing apparatus characterized by the above-mentioned. 2. An information processing apparatus for recording and / or reproducing information on a recording medium, wherein the information is information indicating correspondence between a logical address and a physical address for accessing a predetermined position on the recording medium. A storage unit for storing address correspondence information, a conversion information generation unit for generating conversion information for converting a given logical address to a new logical address, and when a certain logical address is given, a new An information processing apparatus, comprising: a control unit that converts a logical address and calculates a physical address according to the new logical address and the correspondence information. 3. A recording area of a recording medium is divided into a plurality of zones, and each zone is composed of a data area for recording data and a spare area used as a substitute in the case where a defect occurs in a sector in the data area. An information processing apparatus for recording and / or reproducing information, comprising: address correspondence information which is information indicating a correspondence between a logical address and a physical address for accessing a predetermined position on a recording medium; A storage unit that stores zone correspondence information that is information indicating the correspondence with the zone, a conversion information generation unit that generates conversion information for converting all logical addresses belonging to a certain zone into new logical addresses, When a certain logical address is given, a zone corresponding to the logical address is detected based on the zone correspondence information, and the zone is detected in accordance with the conversion information. A control unit that converts a logical address to a new logical address, further converts the logical address to a new logical address according to the conversion information, and calculates a physical address according to the new logical address and the address correspondence information. An information processing apparatus characterized by the above-mentioned. 4. The storage unit is provided with a conversion information storage area for storing the conversion information for each zone, and when the conversion information generation unit generates the conversion information, the control unit is configured to: 4. The information processing apparatus according to claim 3, wherein predetermined conversion information in the conversion information storage area is updated. 5. The information processing apparatus according to claim 1, wherein when the conversion information generation unit generates conversion information for a certain zone, the information processing apparatus performs a process of moving data recorded in the zone to another zone and recording the data. The information processing apparatus according to claim 3, wherein: 6. The information processing apparatus according to claim 3, wherein the conversion information generating unit generates conversion information for a certain zone when the zone is made inaccessible. 7. The information processing apparatus according to claim 6, wherein when the spare area of a certain zone is already recorded, the information processing apparatus makes the zone inaccessible. 8. The method according to claim 1, wherein the conversion information is an offset value for adding a value indicating a logical address, and the conversion information is updated by adding the offset value to a zone after a zone to which access is disabled. Claim 3
Or the information processing device according to 4 or 5 or 6 or 7. 9. The information processing method according to claim 1, wherein said conversion information is an offset value for adding to a value indicating a logical address. apparatus. 10. The information processing apparatus according to claim 1, wherein the information processing apparatus records the conversion information on a recording medium at a predetermined timing. An information processing apparatus according to claim 1. 11. The information processing apparatus according to claim 1, wherein the information processing apparatus reads out the conversion information recorded on a recording medium at a predetermined timing. The information processing device according to 9 or 10. 12. A recording medium for recording information, wherein conversion information for converting a given logical address to a new logical address is recorded. 13. A recording medium for recording information, wherein a recording area is divided into a plurality of zones, and each zone is used in place of a defect in a data recording data area and a sector in the data area. And conversion information for converting a given logical address to a new logical address, the conversion information for converting all logical addresses belonging to a certain zone to a new logical address. Is recorded on the recording medium.