JP2000298949A - Disk system, optical disk system, computer, optical disk device, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To read out data quickly from an optical disk. SOLUTION: Relating to an optical disk device performing defect compensation of a linear exchange system, data substituted in a spare region of an optical disk is previously written in a RAM 37 provided for a computer 2 or a RAM 23 provided for an optical disk device 3 in order to prevent frequent movement of a pickup between a user region and a spare region. When data are read out, it is confirmed whether data are stored in the RAM 23 or 37 or not, when it is stored, data are read out from the RAm 23 or 37 without accessing an optical disk 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an optical disk system and an optical disk apparatus, and more particularly to a technique for quickly reading data recorded on an optical disk.

[0002]

2. Description of the Related Art A disk medium for a DVD-RAM has a user area for recording data and a spare area for replacement. A DVD-RAM device generally employs a linear replacement method in which data is recorded in a user area, and when data cannot be written to the user area due to a defect on a disk surface or the like, data is written to a spare area.

When accessing the spare area, the optical pickup must move between the user area and the spare area. For this reason, if access to the spare area occurs frequently, it takes time to move (seek) the optical pickup, and the access time becomes longer, and the average transfer speed of data between the optical disk device and the computer is reduced.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to enable quick access to data recorded on an optical disk.

[0005]

In order to achieve the above object, a disk system according to a first aspect of the present invention is a disk system for accessing a disk, wherein data is stored in a normal substitute block instead of a defective block. A storage unit that reads and stores the recording data of the substitute block from the recorded disk, a determination unit that determines whether the data instructed to be read is stored in the storage unit, and the determination unit includes: Reading means for reading out the corresponding data from the storage means when it is determined that the data is stored, and reading out the specified data by accessing the disk when it is determined that the data is not stored. Features.

When a substitute block on a disk is accessed, a pickup (optical head or the like) must move between a normal recording area (user area) and a substitute area (spare area). Long travel time and long access time. However, according to this configuration, since the data of the replacement block is stored in the storage means, it is not necessary to access the disk to read the data of the replacement block, and high-speed data access is possible.

For example, the disk records defect management information on defective blocks and substitute blocks.
In this case, the storage unit reads, for example, defect management information from the disk, reads and stores data recorded in a substitute block in accordance with the read defect management information, and the determination unit reads in accordance with the defect management information. And generating storage management information for managing the data read into the storage unit, and determining whether data to be read is stored in the storage unit according to the storage management information.

In the case of a DVD or the like, the disc has a read area, and a data area having a user area and a spare area. In this case, the defective block in the user area is replaced with a normal replacement block in the spare area, and defect management information on the defective block and the address of the replacement block is recorded in the read area. For example, the storage unit reads defect management information from a read area, reads and stores data recorded in a substitute block according to the read defect management information, and the determination unit stores the defect management information and the storage unit. Based on the storage location of, the storage management information that associates the address of the data read into the storage means and the storage location in the storage means,
According to the storage management information, it is determined whether or not data is stored in the storage unit.

In order to achieve the above object, a second aspect of the present invention is provided.
An optical disk system according to the aspect of the present invention includes an optical disk device and a processing device connected to the optical disk device, wherein the optical disk device records data by replacing a defective block of the optical disk with a normal substitute block and performs the processing. In response to a request from the device, the data is read and supplied to the processing device. The processing device reads the data recorded in the substitute block via the optical disk device and stores the data in a storage unit in advance, and the optical disk When reading data from, it is determined whether or not the corresponding data is stored in the storage unit in advance, and when it is determined that the data is stored in advance, the corresponding data is read from the storage unit and is not stored. When the discrimination is made, a request is issued to the optical disc device to read the corresponding data. This optical disk system reads out data recorded in a substitute block of an optical disk, stores the data in a storage unit in advance, determines whether the data is stored in the storage unit in advance, and determines that the data is stored in advance. When you do
The corresponding data is read from the storage unit. Therefore, bother,
There is no need to access a substitute block, and high-speed access is possible.

The optical disk device records defect management information on a defective block and a substitute block on an optical disk, for example, and the processing device reads defect management information from the optical disk, for example, and substitutes defect management information in accordance with the read defect management information. The data recorded in the block is read and stored in the storage unit, and storage management information for managing the data read into the storage unit is generated in accordance with the defect management information, and the storage unit is generated in accordance with the storage management information. It is determined whether or not the data to be read is stored in the.

The optical disk has a read area, a data area having a user area and a spare area, and replaces a defective block in the user area with a normal block in the spare area, and manages the defective block and the address of the replacement block. Information is recorded in a read area, and the processing device reads defect management information from the read area via the optical disc device, and reads data recorded in a substitute block according to the read defect management information. Based on the defect management information and the storage position in the storage unit, the storage unit generates storage management information that associates an address of the data read into the storage unit with a storage position, and generates the storage management information in accordance with the storage management information. It may be determined whether or not data is stored in the storage unit.

The data area is associated with a physical address and a logical address, and the read area is associated with a physical address, but is not associated with a logical address. The device issues a predetermined command to issue a logical address to the optical disk device to access a data area and read defect management information from the read area, and the optical disk device is supplied from the processing device. A logical address may be converted to a physical address to access the data area, and the read area may be accessed according to the command to read out defect management information and transfer it to the processing device.

The optical disk stores a plurality of sets of defect management information. The optical disk apparatus reads a plurality of sets of defect management information from the optical disk, selects the latest one, and selects the selected defect management information. May be transferred to the processing device.

In order to achieve the above object, a third aspect of the present invention is provided.
An optical disk system according to the aspect of the present invention is an optical disk system including an optical disk device and a processing device connected to the optical disk device, wherein the optical disk device replaces a defective block of the optical disk with a normal substitute block to perform data replacement. Is read out and the data recorded in the substitute block is read out and stored in the storage unit in advance, and when the data is read out from the optical disk according to the request from the processing device, whether the data is stored in the storage unit in advance. If it is determined that the data is stored in advance, the corresponding data is read from the storage unit and supplied to the processing device, and if it is determined that the data is not stored, the relevant data is read from the optical disc. The processing device supplies the data from the optical disk to the optical disk device. Requesting readout of the data, receives data from the optical disk apparatus, for processing, characterized in that.

The optical disk device records defect management information on, for example, a defective block and a replacement block on an optical disk, and the optical disk device reads defect management information from the optical disk and replaces the defect management information with a replacement block according to the read defect management information. The recorded data is read and stored in the storage unit, storage management information for managing the data read into the storage unit is generated according to the defect management information, and read out to the storage unit according to the storage management information. It is determined whether or not the target data is stored.

In order to achieve the above object, a fourth aspect of the present invention is provided.
The computer according to the aspect of the present invention is a computer that accesses an optical disk on which data is recorded by replacing a defective block with a normal replacement block by a linear replacement system via an optical disk device, and via the optical disk device The data recorded in the substitute block is read and stored in the storage unit in advance, and when reading the data from the optical disk, it is determined whether the data is stored in the storage unit in advance, and the data is stored in advance. When it is determined, the corresponding data is read from the storage unit, and when it is determined that the data is not stored, the corresponding data is read via the optical disk device.

In order to achieve the above object, a fifth aspect of the present invention is provided.
An optical disc device according to the aspect of the present invention is a device that replaces a defective block of an optical disc with a normal substitute block and records data, and a storage unit that reads data recorded in the substitute block and stores the data in a storage unit in advance, When reading data from the optical disc, it is determined whether or not the data is stored in the storage unit in advance, and when it is determined that the data is stored in advance, the data is read from the storage unit and not stored. Means for reading the corresponding data from the optical disk when it is determined that

In order to achieve the above object, the sixth aspect of the present invention is provided.
The computer according to the aspect of the present invention is a computer that accesses a disk on which data is recorded by replacing a defective block with a normal replacement block by a linear replacement method, reads out the data recorded on the replacement block, and stores the data in a storage unit. It is stored in advance, and when reading data from the disk, it is determined whether or not the data is stored in the storage unit in advance, and when it is determined that the data is stored in advance,
The data is read from the storage unit, and when it is determined that the data is not stored, the data is read.

In order to achieve the above object, a recording medium according to a seventh aspect of the present invention is a computer-readable storage medium which stores, in a computer, an optical disk in which data is recorded in a normal replacement block instead of a defective block by a linear replacement method. A function of accessing via an optical disk device; a function of reading data recorded in a substitute block via the optical disk device and pre-storing the data in a storage unit; A function of determining whether or not the data is stored in advance, a function of reading the corresponding data from the storage unit when it is determined that the data is stored in advance, and And a program for realizing the function of reading the corresponding data.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A data processing system according to a first embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the data processing system 1 includes a computer 2 for executing data processing and an optical disk device 3 on which an optical disk 4 is mounted.

As shown in FIG. 2A, the optical disc 4 includes a lead-in area 100 arranged concentrically,
It comprises a lead-out area 101 and a data area 102.

As shown in FIG. 2B, an information recording track 108 is formed concentrically in each area, and a sector 1 is formed.
Data is recorded in units of 07. Data of 16 consecutive sectors is provided with an error correction code and constitutes an error correction block 106. As shown in FIG. 2C, a physical address is fixedly assigned to each position on the optical disk 4.

The data area 102 includes a user area 104 and a spare area 105.

The user area 104 is composed of zones 103 arranged concentrically. Each zone 103 is concentrically arranged and is an area where arbitrary data is written. The spare area 105 is composed of zones 103 arranged concentrically, and is arranged at the innermost peripheral portion of the data area 102. A defect such as a scratch occurs in the user area 104, and data cannot be written to the user area 104. In this case, it is an area in which data is written instead of the user area 104.

When there is no defective sector in the user area 104, all data is stored in the user area 104 in association with the logical address. On the other hand, user area 1
Among the defective sectors (primary defects) detected during formatting, the defective sectors (primary defects) among the defective sectors 04 as shown in FIG.
No data is written, and data is written to the sector at the next consecutive physical address. User area 1
The shortage of 04 is shifted to the spare area 105. Such a defect compensation method for the user area 104 is called a slip replacement method. The physical address of the defective sector that has undergone slip replacement is registered in a first defect list 120, which will be described later, as shown in FIG.

Also, when it is determined at the time of verification that the data error rate is larger than a predetermined value in one error correction block (16 sectors) 106 (secondary defect)
4B, the recording data of the block is recorded in the spare area 105 as schematically shown in FIG. Such a defect compensation method is called a linear replacement method. FIG. 4 (a)
As shown in (1), the physical address of the head sector of the linearly replaced defective block and the physical address of the head sector of the replaced block are registered in a second defect list 121 described later.

The lead-in area 100 is located at the innermost circumference of the optical disk 4 as shown in FIG. 2A, and has a first defect management area 110 and a second defect management area 110 as shown in FIG. A defect management area 111.

The lead-out area 101 is located at the outermost periphery of the optical disc 4 as shown in FIG.
As shown in (c), a third defect management area 112 and a fourth defect management area 113 are provided.

First to fourth defect management areas 110 to 113
Respectively, a first defect list 120, a second defect list 121, and a zone configuration table 122 are recorded.

The first defect list 120 has 7,679 defect registration numbers as shown in relation to FIGS. 3A and 3B, and each defect registration number has a slip-replaced defective sector. Is registered.

As shown in FIGS. 4A and 4B, the second defect list 121 has 3837 defect registration numbers, and each defect registration number has a linearly replaced defect block. The physical address of the first sector of the spare area 105 and the physical address of the first sector of the block in the spare area 105 replaced with the defective block are registered.

As shown in FIG. 5, the zone configuration table 122 includes an update counter 122a, a column 122b for registering the number of zones (35 in FIG. 5) on the optical disk 4, and a logical sector number at the head of each zone 103. Field 122c for recording
Consists of

The update counter 122a indicates that the defect management area 1
In 10 to 113, the update histories of the four defect lists 120 and 121 respectively recorded are recorded. The lists recorded in each of the defect management areas 110 to 113 should have the same contents, but even if they do not completely match, the latest defect list is specified by the update counter.

The optical disk device 3 shown in FIG.
M device, which functions as an external storage device of the computer 2 and accesses (reads / writes) the optical disk 4 in accordance with an instruction from the computer 2.

The optical disk device 3 includes a mounting section 31 including a turntable, and a pickup (optical pickup) 32.
, Servo circuit 33, signal processing circuit 34, CPU
(Central Processing Unit)
35 and ROM (Read Only Memory)
36 and RAM (Random Access Mem)
ory) 37 and an interface 38.

The above-mentioned optical disk 4 is mounted on the mounting section 31, and is rotated by a turntable. The pickup 32 includes a semiconductor laser, an objective lens, and the like.
The optical disk 4 is irradiated with laser light, the reflected light is photoelectrically converted, and the generated signal is supplied to the signal processing circuit 34.
The pickup 32 changes the physical state of the optical disk 4 by irradiating the optical disk 4 with a recording laser, and records the recording data supplied from the signal processing circuit 34 on the optical disk 4.

The servo circuit 33 performs the seek and tracking of the pickup 32 under the control of the CPU 35, and controls the rotation of the turntable of the mounting section 31 and the like. The signal processing circuit 34 restores the encoded data read from the optical disc 4 by the pickup 32, and encodes and compresses the data to be written to the optical disc 4.

The CPU 35 operates in accordance with the control program recorded in the ROM 36, and controls the servo circuit 33
The entire operation of the optical disk device 3 such as control of the signal processing circuit 34 and communication with the computer 2 is controlled. Also,
The CPU 35 also performs processing such as conversion between a logical address and a physical address. The ROM 36 records a control program for controlling the operation of the optical disc device 3.

The RAM 37 functions as a work area for the CPU 35.

The interface 38 has a SCSI (Sm
all Computer System Inter
face) or ATAPI (AT Attachmen)
The interface is an interface such as tPacket Interface, and is connected to an interface 25 provided in the computer 2 via a cable or the like, and transmits a signal.

The computer 2 is composed of a normal personal computer or the like, and has a CPU (Central).
Processing Unit) 21 and ROM (R
read-only memory 22 and RAM (R
random access memory) 23, a hard disk drive (HDD) 24, and an interface 2
5 is provided.

The CPU 21 operates according to the control program recorded in the ROM 22 and the program stored in the RAM 23, and controls the entire operation of the computer 2.
The ROM 22 stores the CPU 21 such as a basic input / output program.
Record a program for controlling the basic operation of.

The RAM 23 functions as a main memory of the CPU 21. Further, the RAM 23 stores the above-described second defect list 121 read from the lead-in area 100 and the lead-out area 101 of the optical disc 4, the defect registration list 123 generated from the zone configuration table 122, and the data of the substitute block. I do. More specifically, a defective block in the user area 104 on the optical disc 4 is replaced by a replacement block on the spare area 105 by the linear replacement. A copy of this alternative block is stored in RAM 23
Placed in The defect registration list 123 includes the logical address of the head sector of the replacement block, the physical address of the head sector of the replacement block, and the R of the block data.
The head address of the storage position on the AM 37 is stored in association with the start address.

The interface 25 is a SCSI or A
It is an interface such as TAPI and transmits signals to and from the interface 38 of the optical disk device 3.

The hard disk device 24 stores programs executed by the CPU 21, data processed by the CPU 21, and the like.

FIG. 7 is a logical block diagram showing a logical configuration of the data processing system according to the first embodiment.
As shown in FIG. 7, the optical disc device 3 is functionally
An access control unit 51, a first address conversion unit 52,
An interface 53 is provided.

The access control unit 51 includes the pickup 3
2, servo circuit 33, signal processing circuit 34, CPU 35,
Reads data from the optical disk 4 in accordance with an instruction from the computer 2,
The data is transferred to the computer 2 via the interface 53. Further, the access control unit 51 writes the data requested to be written by the computer 2 to the optical disc 4.

The first address conversion section 52 performs the first and second defect lists 120 and 12 read from the optical disc 4.
1 and a zone configuration table 122, and converts a logical address for accessing the optical disk 4 received from the computer 2 into a physical address using the defect lists 120 and 121 and the zone configuration table 122.

On the other hand, the computer 2 functionally includes a processing program 62 operating on the operating system 61, a control program 63 for accessing the optical disk 4, and an interface 64.

Operating system (OS) 61
Is stored in the hard disk drive 24 or the like,
3 is executed by the CPU 21 and controls the operation of the entire computer 2. The processing program 62 and the control program 63 are an operating system 61
Works on.

The processing program 62 is application software or the like, is stored in the hard disk device 24 or the like, is read into the RAM 23, is executed on the OS 61 by the CPU 21, and requests data reading, data writing, and the like.

The control program 63 includes a data management unit 65
And controls the operation of the optical disk device 3. For example,
The control program 63 issues a logical address and requests the optical disk device 3 to access the optical disk 4. In addition, the control program 63 determines the first and second defects recorded in the read area (the lead-in area 100 and the lead-out area 101) of the optical disc 4 at a predetermined timing, for example, when the computer 2 is started or idle. The data in the lists 120 and 121 and the data in the zone configuration table 122 are read into the RAM 23 in advance, and the data read into the RAM 23 is registered in the data management unit 65.

The data management unit 65 includes a second address conversion unit 66, and processes data transmitted and received between the optical disk device 3 and the computer 2.

The second address conversion unit 66 calculates the physical address of the first sector of the defective block recorded in the second defect list 121 using the logical sector number recorded in the zone configuration table 122, The converted logical address is registered in the defect registration list 123 as shown in FIG.

The defect registration list 123 has a maximum of 3837 defect registration numbers. One defect registration number includes a logical address of a head sector of a defective block on the optical disk 4 and a physical address of a head sector of a replaced block. The address and the start address (memory address) of the storage position of the block on the RAM 23 are recorded.

Since a logical address is not assigned to the lead-in area 100 and the lead-out area 101 of the optical disk 4, the control program 63
00 and the data recorded in the lead-out area 101 cannot be directly specified by a logical address to request access.

For this reason, the control program 63 issues the data recorded in the lead-in area 100 and the lead-out area 101 to the optical disk device 3 to read out the data, and the access control unit 51 performs the corresponding processing. Transfer to computer 2.

The operation of the data processing system according to the first embodiment of the present invention will be described below with reference to the drawings.

The computer 2 of this data processing system
Is the spare area 10 of the optical disc 4
Block data recorded on the optical disk 4 is read in advance.
Data can be read out without accessing the data.

The operation until the data of the block of the user area 104 replaced with the spare area 105 is read into the computer 2 will be described with reference to the flowcharts of FIGS. FIG. 8 shows the computer 2
FIG. 9 shows the operation of the optical disk device 3.

The control program 63 of the computer 2
Instructs to read defect management information including the defect lists 120 and 121 and the zone configuration table 122 recorded in the lead-in area 100 and the lead-out area 101 of the optical disc 4 at a predetermined timing such as at the time of start-up or at the time of idling. The command X1 to be executed is output to the optical disk device 3 (FIG. 8, step S11). After that, the control program 63
Waits until defect management information is received from the optical disk device 3 (step S12).

Access control unit 51 of optical disk device 3
Starts the processing of FIG. 9 upon receiving the command X1,
First, the optical disk 4 is accessed and the lead-in area 1 is read.
The four defect management information recorded in the defect management areas 110 and 111 of the 00 and the defect management areas 112 and 113 of the lead-out area 101 are read out (step S2).
1, S22).

When detecting that all the defect management information has been transferred to the RAM 37 (step S22, YES), the access control unit 51 determines whether all the four defect management information transferred to the RAM 37 match. (Step S23).

When detecting that all four pieces of defect management information transferred to the RAM 37 match (step S23, YES), the access control unit 51 selects one of the four pieces of defect management information (step S24). Then, the selected defect management information is transferred to the computer 2 (step S2).
5).

On the other hand, the access control unit 51
When it is detected that the four pieces of defect management information that have been transferred do not match (step S23, NO), the latest defect management information is selected from the history recorded in the update counter 122a of the zone configuration table 122 (step S23). S26), and transfers the selected defect management information to the computer 2 (step S25).

The control program 63 includes the access control unit 5
1 receives the defect management information transmitted in step S25, and stores it in the RAM 23 (FIG. 8, step S1).
2, YES).

Next, the control program 63 converts the physical address of the head sector of each defective block registered in the defect list 121 and the physical address of the head sector of the replaced block into logical addresses by the address conversion unit 66. I do. The converted logical address is stored in the defect registration list 12
3 (step S13).

Next, the control program 63 determines whether at least one defective block is registered in the defect registration list 123 (step S14). Here, when the defective block is not registered (step S
14, NO), there is no defective block on the optical disc 4, and no access is made to the substitute block in the first place, so the process ends.

When it is determined that a defective block is registered in the defect registration list 123 (step S14, YE
S), the control program 63 reads the defect registration list 123 in order from the defect registration number 1, specifies the logical address of the first sector of the replacement block, and requests the optical disk device 3 to read one block of data (step S). S15). According to this request, the optical disc device 3
The first address conversion unit 52 converts the logical address into a physical address, and the access control unit 51 reads out the data of the designated alternative block and transfers it to the computer 2.

The control program 63 sequentially records the transferred block data in the RAM 23 (step S1).
6). Further, the address (memory address) of the recording position is registered in a corresponding entry of the defect registration list 123.

The control program 63 compares the number of substitute blocks whose data has been read into the RAM 23 with the upper limit of the number of substitute blocks read by the RAM 23, and determines whether or not the transfer has been completed (step S17). With this upper limit, the number of replaced blocks transferred to the RAM 23 can be substantially limited. Control program 63
When detecting that the number of read alternative blocks is equal to or less than the upper limit (step S17, NO), step S1
Then, a request to read the next one block of data from the optical disk 4 is transferred to the optical disk device 3.

On the other hand, when the control program 63 detects that the number of read and replaced blocks has reached the upper limit (step S17, YES), the control program 63 does not read the data of the selected one block from the optical disc 4, Null data (zero) indicating the last data is registered in the memory address of the defect registration list 123.

Next, a normal data read operation of the computer 2 will be described with reference to the flowchart of FIG. The processing program 62 issues a request to read data recorded (stored) on the optical disc 4 to the OS 61 as necessary, for example, by specifying a logical address.

The control program 63 is started up as needed, and sets the read request and the logical address of the data to be read to the OS.
61 (step S31). The control program 63 determines whether or not the logical address of the data to be read is registered in the defect registration list 123.

When the control program 63 does not detect the logical address of the data to be read out on the defect registration list 123 (step S32, NO), the control program 63 notifies the optical disk device 3 of the logical address, and Request reading (step S33). The address conversion unit 52 converts the logical address of the data requested to be read into a physical address,
Reads data from a position specified by a physical address on the optical disk 4 and transfers the read data to the computer 2. The control program 63 stores the received data in the RAM 23 (Step S34). afterwards,
The processing program 62 accesses the data read on the RAM 23 (Step S35).

On the other hand, when detecting the logical address of the data to be read on the defect registration list 123 (step S32, YES), the control program 63 determines whether or not the memory address of the data to be read is registered in the defect registration list 123. Is determined. That is, the control program 63 determines whether the data to be read is actually stored in the RAM 23 (step S36).

If the control program 63 does not detect the memory address of the data to be read on the defect registration list 123 (step S36, NO), it requests the optical disk device 3 to read the data by designating the logical address (step S36). Step S33).

On the other hand, when the control program 63 detects the memory address of the data to be read out on the defect registration list 123 (step S36, YES), the control program 63 calculates the RAM 2 from the memory address recorded in the defect registration list 123.
3 is read (step S37).

As described above, the data processing apparatus according to this embodiment reads data of a block replaced by a defective block by linear replacement into the RAM 23 in the computer 2 in advance, and records the data in the replacement block. When reading out the stored data, a request for access to the optical disk device 3 is not issued. Therefore, target data can be read at high speed without causing the pickup 32 to seek and access the spare area 105.

In the above description, the logical address of the first sector of the defective block is registered in the defect registration list 123 shown in FIG. 6, but this may be used as the physical address.
In this case, the control program 63 converts the logical address to be accessed into a physical address using the zone configuration table 122 or the like, and determines whether or not the corresponding block data is stored in the RAM 23. In this case, the access instruction to the optical disk device 3 may be performed by designating the logical address of the head sector of the defective block, or by specifying the physical address of the head sector of the replacement block. The optical disk device 3 performs an address conversion as necessary according to an instruction from the computer 2,
The optical disk 4 is accessed.

(Second Embodiment) In the first embodiment, the data of the replacement block registered in the defect registration list 123 is stored in the RAM 2 provided in the computer 2.
Transferred to 3. Therefore, the data of the substitute block is
Occupation of M23 and restriction of the operation of the CPU 21 may affect the operation of the computer 2.
In order to reduce this problem, it is also possible to transfer the data of the substitute block to the RAM 37 provided in the optical disc device 3 and read the data from the RAM 37 as needed.

An optical disk system having such a function will be described below. The hardware configuration of the optical disk system according to this embodiment is the same as the hardware configuration of the system according to the first embodiment shown in FIG.

FIG. 11 shows a functional configuration of the optical disk system according to the second embodiment. Access control unit 51
Reads the data requested by the computer 2 from the optical disk 4 or the RAM 37 and transfers the read data to the computer 2. The access control unit 51
Controls the pickup 32 to write the data requested to be written to the optical disc 4 by the computer 2 to the optical disc 4.

The address conversion unit 52 converts the physical address registered in the second defect list 121 into the defect registration list 12
Register to 4.

As shown in FIGS. 12A and 12B, the defect registration list 124 has a maximum of 3837 defect registration numbers, and one defect registration number includes the number of defective blocks generated on the optical disc 4. The physical address of the first sector, the physical address of the first sector of the block replaced with the defective block, and the memory address of the first sector of the memory block of the RAM 37 replaced with the defective block are recorded.

Hereinafter, the operation of the optical disk system according to the second embodiment of the present invention will be described with reference to the flowchart of FIG. FIG. 13 shows the spare area 105.
RAM provided in the optical disk device 3 for the data of the block
37 is a flowchart illustrating a process of transferring data to an H.37.

At the time of startup or idle, the access control unit 5
1 reads the defect management information from the optical disc 4 and transfers the read defect management information to the RAM 37 (step S).
41, S42). The access control unit 51 repeats the processing until all the defect management information is transferred to the RAM 37.

On the other hand, when detecting that the defect management information has been transferred to the RAM 37, the access control unit 51 determines whether or not all the defect management information read from the defect management areas 110 to 113 match (see FIG. 4). Step S4
3).

When the access control unit 51 detects that all four pieces of defect management information do not match, the access control unit 51 selects the latest defect list 121 from the history of the update counter of the defect management information (step S44), and selects the selected defect. Listing 121
A defect registration list 124 is created (step S4).
6).

On the other hand, if the access control unit 51 detects that all four pieces of defect management information match, it selects one of the four defect lists 121 (step S4).
5) Defect registration list 1 from the selected defect list 121
24 (step S46).

[0092] The access control unit 51 sets the defect registration list 1
24, data of one block is read from the optical disc 4 (step S4).
7) Write the read data block to the RAM 37 (step S48). The write position (memory address) of the data block on the RAM 37 is determined by the address conversion unit 5.
2 is registered in the defect registration list 124.

As described above, when the data of one block is transferred from the optical disc 4 to the RAM 37, the access control unit 51 determines whether the transfer of the data of all the replacement blocks registered in the defect registration list 124 has been completed. It is determined whether or not it is (step S49).

When the access control unit 51 determines that untransferred block data remains (step S49, N
O), returning to step S47, and continuing the processing. When determining that there is no untransferred block data remaining (step S49, YES), the access control unit 51 ends the process.

Next, the operation of the computer 2 for reading data from the optical disk 4 will be described with reference to FIG. First, the control program 63 specifies the logical address of the data to be read, and instructs the optical disc device 3 to read the data. The access control unit 51 receives this instruction, and converts the logical address into a physical address by the address conversion unit 52 (step S51).

The access control unit 51 determines whether the physical address of the data to be read is registered in the defect registration list 124 (step S52). Upon detecting that the physical address is registered in the defect registration list 124 (step S52, YE).
S), it is determined whether or not the memory address is registered in the defect registration list 124 (step S53).

When the access control unit 51 detects that the memory address of the data to be read is registered in the defect registration list 124 (step S53, YES),
Data is read from the corresponding memory address of the RAM 37, and the read data is transferred to the computer 2 (step S54).

On the other hand, when detecting that the physical address of the data to be read is not registered in the defect registration list 124 (step S 52, N
O), data is read from the corresponding physical address on the optical disk 4 (step S55), and the read data is transferred to the computer 2 (step S57).

When the access control unit 51 detects that the physical address of the data to be read is registered in the defect registration list 124 but the memory address of the data to be read is not registered in the defect registration list 124 ( (Step S53, NO), the data is read from the corresponding physical address of the optical disk 4, and the read data is transferred to the computer 2.

As described above, the optical disk device 3 of this embodiment reads the data of the blocks in the spare area 105 into the RAM 37 of the optical disk device 3 in advance. Therefore, the optical disc device 3 reads the data of the block replaced with the defective block by using the RA
M32 can be read directly from the pickup 32
Moving time between the user area 104 and the spare area 105 can be reduced, and data can be promptly provided to the computer 2.

Furthermore, since the transfer of the data of the substitute block from the optical disk 4 to the RAM 37 and the transfer of the data of the substitute block from the RAM 37 to the computer 2 are controlled by the optical disk device 3, the consumption of the resources of the computer 2 can be reduced. Can be.

Note that the present invention is not limited to the above-described embodiment, and various modifications and applications are possible. For example, the first
In the second embodiment, the defect management information is read from the optical disk when the optical disk device and the computer are started or when the computer is in an idle state. The present invention is not limited to this, and when an optical disk is inserted into the optical disk device from outside, it may be detected that the optical disk has been inserted, and the defect management information recorded on the optical disk may be read.

In the first embodiment, the defect management areas 110 to 113 in which defect management information is recorded are as follows.
The physical address at that location is fixed. Therefore, a command X2 for accessing the physical address specified by the computer 2 and reading data recorded at the physical address specified by the computer 2 may be provided. Further, the present invention is not limited to the example in which the registration list and the substitute block data are recorded in the RAM. For example, the data may be stored in the hard disk drive 24.

Further, out of the substitute block data on the optical disk 4, how much data is stored in the RAM 23 in the computer 2 (first embodiment) or the RAM 37 in the optical disk device 3 (second embodiment) Is appropriately set according to the required response speed, RAM capacity, defect ratio, and the like.

The defect registration list 123 (FIG. 6) and 1
The items registered in 24 (FIG. 12) are not limited to the above-described embodiment. RAM outputs the address output by computer 2
The configuration is arbitrary as long as it can be converted into the memory address of 23 or 37 and the physical address of the optical disk 4 and the target block data can be accessed accurately. The configurations of the defect lists 120 and 121 and the zone configuration table 122 are the same, and are not limited to the above-described embodiment.

In the above description, the present invention is applied to DVD-RA
Although the example applied to M has been described, the present invention is not limited to this. A normal data storage area and an area for replacement of a defective area are divided, and recording data of the defective area is recorded in an alternative area, and a head (pickup) moves between the two areas upon access. Of the storage device.

[0107]

According to the present invention, data recorded on an optical disk can be quickly accessed.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a hardware configuration of a disk system according to an embodiment of the present invention;

FIG. 2 is a diagram for explaining an optical disk device and its recording area.

FIG. 3 is a diagram for explaining slip replacement.

FIG. 4 is a diagram for explaining linear replacement.

FIG. 5 is a diagram for explaining a zone configuration table.

FIG. 6 is a diagram for explaining linear replacement.

FIG. 7 is a diagram illustrating a functional configuration of the optical disc device according to the first embodiment;

FIG. 8 is a flowchart illustrating a process of transferring data of a substitute block of an optical disc to a RAM in a computer.

FIG. 9 is a flowchart illustrating a process of reading defect management information of an optical disc into a RAM in a computer.

FIG. 10 is a flowchart illustrating a data reading process.

FIG. 11 is a diagram illustrating a functional configuration of an optical disc device according to a second embodiment.

FIG. 12 is a diagram for explaining a defect registration list stored in the optical disc device.

FIG. 13 is a flowchart illustrating a process of creating a defect registration list.

FIG. 14 is a flowchart illustrating a data read process.

[Explanation of symbols]

 Reference Signs List 1 optical disk system 2 computer 3 optical disk device 4 optical disk

Claims (14)

[Claims] 1. A disk system for accessing a disk, comprising: storage means for reading and storing recorded data of a substitute block from a disk on which data is recorded by replacing a defective block with a normal substitute block; Determining means for determining whether the instructed data is stored in the storage means; and when the determining means determines that the data is stored, the corresponding data is read from the storage means and stored. Reading means for accessing the disk and reading the specified data when it is determined that the disk is not present. 2. The disk stores defect management information on a defective block and a replacement block. The storage unit reads the defect management information from the disk and records the defect management information on the replacement block according to the read defect management information. The determination means generates storage management information for managing the data read into the storage means according to the defect management information, and reads out the data to the storage means according to the storage management information. 2. The disk system according to claim 1, wherein it is determined whether or not the target data is stored. 3. The disk has a read area, a data area having a user area and a spare area, and replaces a defective block in the user area with a normal substitute block in the spare area. The storage means reads defect management information from the read area, and reads and stores data recorded in a replacement block according to the read defect management information. The determination unit generates storage management information that associates an address of data read into the storage unit with a storage position in the storage unit based on the defect management information and the storage position of the storage unit. According to storage management information, determine whether data is stored in the storage means,
The disk system according to claim 2, wherein: 4. An optical disk system comprising an optical disk device and a processing device connected to the optical disk device, wherein the optical disk device records data by replacing a defective block of the optical disk with a normal substitute block. In response to a request from the processing device, data is read and supplied to the processing device, and the processing device reads data recorded in a substitute block via the optical disk device and stores the data in a storage unit in advance. When reading data from the optical disc, it is determined whether or not the data is stored in the storage unit in advance, and when it is determined that the data is stored in advance, the data is read from the storage unit and stored. When it is determined that the data has not been read, the corresponding data is read out by issuing a request to the optical disk device. System. 5. The optical disk device records defect management information on a defective block and a replacement block on an optical disk, and the processing device reads the defect management information from the optical disk and replaces the defect management information with the replacement block according to the read defect management information. The recorded data is read and stored in the storage unit, storage management information for managing the data read into the storage unit is generated according to the defect management information, and read out to the storage unit according to the storage management information. 5. The optical disk system according to claim 4, wherein it is determined whether or not target data is stored. 6. The optical disk has a read area, a data area having a user area and a spare area, and replaces a defective block in the user area with a normal block in the spare area, and addresses the defective block and the replacement block. The processing device reads defect management information from the read area via the optical disk device, and according to the read defect management information, stores the data recorded in the replacement block in the read area. The storage unit reads and stores the information in the storage unit, and based on the defect management information and the storage position in the storage unit, generates storage management information that associates the address of the data read into the storage unit with the storage position, and according to the storage management information 6. The light according to claim 5, wherein it is determined whether data is stored in the storage unit. Disk system. 7. A physical address and a logical address are associated with the data area, and a physical address is associated with the read area, but a logical address is not associated with the read area. The processing device issues a predetermined command to issue a logical address to the optical disc device to access a data area and read defect management information from the read area, and the optical disc device supplies the command from the processing device. 7. The method according to claim 6, further comprising: converting said logical address into a physical address to access said data area; accessing said read area in accordance with said command; reading out defect management information; Optical disk system. 8. The optical disc stores a plurality of sets of defect management information. The optical disc apparatus reads a plurality of sets of defect management information from the optical disc, selects the latest one, and selects the selected defect management information. The optical disk system according to any one of claims 5 to 7, wherein is transmitted to the processing device. 9. An optical disk system comprising an optical disk device and a processing device connected to the optical disk device, wherein the optical disk device records data by replacing a defective block of the optical disk with a normal substitute block. At the same time, the data recorded in the substitute block is read and stored in the storage unit in advance, and when reading the data from the optical disk in accordance with a request from the processing device, it is determined whether the data is stored in the storage unit in advance. When it is determined that the data is stored in advance, the corresponding data is read from the storage unit and supplied to the processing device. When it is determined that the data is not stored, the corresponding data is read from the optical disk and the processing is performed. The processing device requests the optical disk device to read data from an optical disk. An optical disk system which receives data from the optical disk apparatus, for processing, characterized in that. 10. The optical disc device according to claim 1, wherein
The defect management information on the defective block and the replacement block is recorded.The optical disk device reads the defect management information from the optical disk, reads the data recorded on the replacement block according to the read defect management information, and stores the data in the storage unit. Generating storage management information for managing data read into the storage unit according to the defect management information;
10. The optical disk system according to claim 9, wherein it is determined whether or not data to be read is stored in the storage unit according to the storage management information. 11. A computer for accessing, via an optical disk device, a disk on which data has been recorded by replacing a defective block with a normal alternative block by a linear replacement method, comprising the steps of: The data recorded in the memory is read and stored in the storage unit in advance, and when reading the data from the disk, it is determined whether the data is stored in the storage unit in advance, and it is determined that the data is stored in advance. And reading the relevant data from the storage unit and, if it is determined that the data is not stored, reads the relevant data via the optical disk device. 12. An optical disk apparatus for recording data by replacing a defective block of an optical disk with a normal substitute block, comprising: storage means for reading data recorded in the substitute block and storing the data in a storage unit in advance; When reading data, it is determined whether or not the corresponding data is stored in the storage unit in advance, and when it is determined that the data is stored in advance, the corresponding data is read from the storage unit and it is determined that the data is not stored. When you do
An optical disk device, comprising: means for reading data from the optical disk. 13. A computer for accessing a disk on which data is recorded by replacing a defective block with a normal substitute block by a linear replacement method, wherein the data recorded in the substitute block is read and stored in a storage unit in advance. In addition, when reading data from the disk, it is determined whether or not the data is stored in the storage unit in advance, and when it is determined that the data is stored in advance, the data is read from the storage unit, A computer which reads out corresponding data when it is determined that the data is not stored. 14. A function of accessing, via an optical disk device, an optical disk on which data is recorded by replacing a defective block with a normal replacement block by a linear replacement method, and replacing the data via the optical disk device. A function of reading data recorded in the block and storing the data in the storage unit in advance, and a function of determining whether or not the data is stored in the storage unit when reading the data from the optical disc. And a function of reading the relevant data from the storage unit when it is determined that the data is not stored, and a function of reading the relevant data via the optical disk device when it is determined that the data is not stored. Computer readable recording medium.