JP5021362B2 - Playback device and determination method - Google Patents

Description

  The present invention relates to a reproducing apparatus that performs at least reproduction on a recording medium such as an optical disk, and a determination method for determining whether the recording medium is recorded / unrecorded.

As a technique for recording / reproducing digital data, optical disks (including magneto-optical disks) such as CD (Compact Disc), MD (Mini-Disc), DVD (Digital Versatile Disc) are used as recording media. There is data recording technology. An optical disk is a generic term for recording media that irradiate laser light onto a disk in which a thin metal plate is protected with plastic, and read signals by changes in reflected light.
The optical disc includes, for example, a read-only type as known as CD, CD-ROM, DVD-ROM, MD, CD-R, CD-RW, DVD-R, DVD-RW, DVD + RW, DVD -There is a type in which user data can be recorded as known in RAM and the like. In the recordable type, data can be recorded by using a magneto-optical recording method, a phase change recording method, a dye film change recording method, or the like. The dye film change recording method is also called a write-once recording method, and can be recorded only once and cannot be rewritten. On the other hand, the magneto-optical recording method and the phase change recording method can rewrite data and are used for various purposes such as recording of various content data such as music, video, games, application programs and the like.

In recent years, a high-density optical disk called a Blu-ray Disc (registered trademark) has been developed, and the capacity has been significantly increased.
For example, in this high-density disk, when data recording / reproduction is performed under the condition of a combination of a laser having a wavelength of 405 nm (so-called blue laser) and an objective lens having an NA of 0.85, the track pitch is 0.32 μm, the linear density is 0.12 μm / When a 64 KB (kilobyte) data block is used as one recording / playback unit and the format efficiency is about 82%, a capacity of about 23.3 GB (gigabyte) can be recorded on a direct 12 cm disc.
Even for such a high-density disk, a write-once type and a rewritable type have been developed.

Here, as a Blu-ray disc, for example, in BD-R (Blu-ray Disc Recordable) in which only additional recording is possible, TDMS (Temporary Disc Management) which is management information is used to manage data recording structure and disc defect information. The TDMS is additionally recorded in a TDMA (Temporary Disc Management Area) as a management information recording area provided at a predetermined position on the disc. The last added TDMS is an effective TDMS (see FIG. 5).
A plurality of TDMAs are provided in the lead-in area and data area on the inner periphery of the disk, and serial numbers are assigned as TDMAn (n = 0, 1, 2,...), Respectively. The TDMA is used in the order of numbers such as TDMA0, TDMA1, TDMA2,..., And TDMS is continuously recorded for each TDMA in order from the top.

In the BD-R, an area in which a TDMA access indicator indicating which TDMA is valid (that is, in which TDMA the latest TDMS is written) is written in TDMA0 (first temporary management information record). Is reserved at the beginning of the area.
In this case, when the latest TDMS is written in TDMA0, the TDMA access indicator is not written at all. When this TDMA0 is used up to update the TDMS and the TDMS is written to the next TDMA1, writing is performed to the TDMA1 access indicator to indicate that the TDMA1 has the latest information. Thereafter, similarly, when the TDMA1 is used up for updating and the TDMS is written into the TDMA2, the TDMA2 access indicator indicating that the TDMA2 has the latest information is written.
In FIG. 5, the first DMA access indicator indicates whether writing has been performed at the time of finalizing the disk and the disk has been finalized.
These TDMA access indicator and DMA access indicator are functions introduced in order to shorten the disc recognition time.

  Here, according to the above description, it is possible to confirm which TDMA has the latest information by checking the written / unwritten status of each TDMA access indicator. If both TDMA access indicators are unwritten, the latest information is either in TDMA0 or a blank disk that has not been written to the disk.

  By utilizing such a function of the TDMA access indicator, blank disc determination is also performed on the drive device side. Specifically, if all the TDMA access indicators are all unwritten, it is further checked whether data is written in the TDMS writing area of TDMA0 to determine whether the disk is a blank disk. It is to confirm.

In addition, about the related prior art, the following patent documents can be mentioned.
JP 2006-85859 A JP 2006-114107 A

  Here, as a blank disk determination process using the function of the TDMA access indicator, conventionally, after determining whether or not each access indicator has been written, the writing state of TDMA0 is checked again. That is, the unnecessary seek is sandwiched accordingly, thereby helping to delay the determination time of the blank disc.

In the present invention, in view of the above problems, the reproducing apparatus is configured as follows.
That is, the playback apparatus of the present invention has a user data recording area in which user data can be recorded, and temporary management information to be updated according to data recording in the user data recording area, in the first order. When the temporary management information recording area and the first temporary management information recording area are used for updating the temporary management information, the temporary management information recording area is newly provided in the first temporary management information recording area. Temporary management information in which the latest management information is recorded when the temporary management information is recorded for the first time in one or a plurality of second temporary management information recording areas in which the management information is recorded. An area usage status presentation information recording area for sequentially recording the area usage status presentation information for indicating the recording area, and the temporary management information recording area includes the temporary management information. A reproducing apparatus that performs at least reproduction with respect to a recording medium that is configured to record information in a section subsequent to the area utilization status presentation information recording area, and includes a reading unit that performs reading from the recording medium. .
In addition, a reading control process for causing the reading means to execute reading for at least the area usage status presentation information recording area and a predetermined section following the area at once ,
Based on the result of determining whether or not data is recorded only in the predetermined section from the read result obtained according to the read control process, the recording / non-recording state of data in the user data recording area is determined. And a control means for executing the determination process.

  According to the present invention, as in the above-described BD-R, the temporary management information (TDMS) to be updated in response to data recording in the user data recording area is sequentially recorded. A temporary management information recording area (TDMA0) and a first temporary management information recording area are provided in the first temporary management information recording area, and are newly added when the first temporary management information recording area is used up for updating the temporary management information. When the temporary management information is recorded for the first time in one or a plurality of second temporary management information recording areas (TDMA other than TDMA0) in which the temporary management information is recorded, the latest management information is recorded. And an area usage status presentation information recording area (access indicator area) for sequentially recording the area usage status presentation information for indicating the temporary management information recording area to be recorded, and above In the first temporary management information recording area, when the temporary management information is recorded for the section following the area usage status presentation information recording area, the area usage status presentation information recording area The following predetermined section (that is, the first section of the TDMS writing area of TDMA0) is read at a time, and the user data recording is performed based on the result of determining whether data is recorded only in the predetermined section from the read result. It is possible to determine the data recording / non-recording state in the area.

  As described above, according to the present invention, in the determination of the data recording / unrecorded state in the user data recording area (determination of whether or not the disk is a blank disk), the area utilization status presentation information recording area After confirming the writing state, it is not necessary to perform a seek operation for confirming the writing state in the first temporary management information recording area again. As a result, the recorded / unrecorded state of data in the user data recording area can be confirmed more quickly.

Hereinafter, embodiments of the present invention will be described in the following order.

1. Disk structure.
2. DMA.
3. TDMA.
3-1 TDMA structure and TDMS update unit.
3-2 TDDS.
3-3 TDFL.
3-4 SRR and SRRI.
3-5 Replacement process using a replacement area.
3-6 TDMA addition processing.
4). Configuration of the disk drive device.
5. Conventional blank disc determination processing.
6). Blank disk determination processing of the present embodiment.

1. Disk structure.

First, an optical disk used in the recording system of the embodiment will be described. This optical disc can be implemented as a write-once disc in the category of a high-density optical disc system called a so-called Blu-ray disc.
An example of physical parameters of the high-density optical disk used in this embodiment will be described.
The optical disc of this example has a disc size of 120 mm in diameter and a disc thickness of 1.2 mm. In other words, these are the same as CD (Compact Disc) type discs and DVD (Digital Versatile Disc) type discs in terms of external appearance.
A so-called blue laser is used as a recording / reproducing laser, and the optical system has a high NA (for example, NA = 0.85), and a narrow track pitch (for example, track pitch = 0.32 μm). By realizing a high linear density (for example, a recording linear density of 0.12 μm), a user data capacity of about 23 G to 25 G bytes is realized on a disk having a diameter of 12 cm.
Also, a so-called double-layer disc having two recording layers has been developed. In the case of a double-layer disc, the user data capacity is about 50 Gbytes.

FIG. 1 shows the layout (area configuration) of the entire disc.
In the system of this example, the layout of FIG. 1 is formed by the disk formatting (initialization) process. In the following description, as an example, the case where the optical disc is a single layer disc (SL) will be described.
As an area on the disk, a lead-in zone, a data zone, and a lead-out zone are arranged from the inner peripheral side.
If you look at the area structure related to recording and playback. The prerecorded information area PIC on the innermost circumference side in the lead-in zone is a reproduction-only area, and the area from the management area of the lead-in zone to the lead-out zone is a write-once area that can be recorded once.

In the read-only area and the write-once area, recording tracks are formed in a spiral shape by wobbling grooves (meandering grooves). The groove is used as a tracking guide when tracing with a laser spot, and the groove is used as a recording track to record and reproduce data.
In this example, an optical disk on which data is recorded in the groove is assumed. However, the present invention is not limited to such an optical disk of groove recording, and is a land recording method for recording data on a land between grooves. The present invention may be applied to an optical disc, and may also be applied to a land / groove recording type optical disc that records data in a groove and a land.

The groove used as the recording track has a meandering shape corresponding to the wobble signal. Therefore, in a disk drive device for an optical disk, both edge positions of the groove are detected from the reflected light of the laser spot irradiated to the groove and the laser spot is moved along the recording track. By extracting the fluctuation component in the radial direction, the wobble signal can be reproduced.
In this wobble signal, address information (physical address, other additional information, etc.) of the recording track at the recording position is modulated. Therefore, in the disk drive device, address control or the like at the time of data recording or reproduction can be performed by demodulating address information or the like from the wobble signal.

The lead-in zone shown in FIG. 1 is an area inside a radius of 24 mm, for example.
A radius of 22.2 to 23.1 mm in the lead-in zone is set as the prerecorded information area PIC.
In the prerecorded information area PIC, disk information such as recording / reproducing power conditions, area information on the disk, information used for copy protection, and the like are recorded as reproduction-only information by groove wobbling. Such information may be recorded by embossed pits or the like.
Although not shown, a BCA (Burst Cutting Area) may be provided further on the inner circumference side than the prerecorded information area PIC. BCA records a unique ID unique to a disk recording medium by a recording method that burns out a recording layer. That is, by forming the recording marks so as to be arranged concentrically, barcode-shaped recording data is formed.

In the lead-in zone, for example, a range with a radius of 23.1 to 24 mm is set as a management / control information area.
In the management / control information area, a predetermined area format including a control data area, DMA (Disc Management Area), TDMA0 (TDMA: Temporary Disc Management Area), test write area (OPC), buffer area, and the like is set.
The following management / control information is recorded in the control data area in the management / control information area.
That is, the disc type, disc size, disc version, layer structure, channel bit length, BCA information, transfer rate, data zone position information, recording linear velocity, recording / reproducing laser power information, etc. are recorded.
Similarly, a test write area (OPC) provided in the management / control information area is used for trial writing when setting data recording / reproducing conditions such as laser power during recording / reproducing. That is, it is an area for adjusting recording / reproducing conditions.

A DMA is provided in the management / control information area. Usually, in the field of disk systems, the DMA is called “Defect Management Area”, and replacement management information for defect management is recorded. However, in the disk of this example, the DMA records not only replacement management of defective portions but also management / control information for realizing data rewriting in this write-once disk. Furthermore, the SRRI described later is also recorded. Therefore, the DMA has a function as a “Disc Management Area”.
Further, in order to enable data rewriting using the replacement process, the contents of the replacement management information must be updated in accordance with the data rewriting. Furthermore, management information on the data recording structure must be updated in accordance with the additional recording. For this reason, an area called TDMA for updating these management information is provided.
In this case, management information (hereinafter also simply referred to as management information) regarding the replacement and data recording structure as described above is additionally recorded and updated sequentially from TDMA0. As will be described in detail later, when TDMA0 is used up for updating management information, additional writing can be performed in TDMA1 and TDMA2 as areas for writing further management information (see FIG. 2). For DMA, the management information (latest management information) last recorded in the TDMA is recorded at the time of finalizing the disk.
DMA and TDMA will be described in detail later.

  For example, a radius of 24.0 to 58.0 mm on the outer peripheral side from the lead-in zone is set as the data zone. The data zone is an area where user data is actually recorded and reproduced. The data zone start address ADdts and end address ADdte are indicated in the data zone position information of the control data area described above.

In the disk of this example, a spare area (spare area) is formed in the data zone. In this case, in the data zone, an ISA (Inner Spare Area) is provided on the innermost periphery, and an OSA (Outer Spare Area) is provided on the outermost periphery. These ISA and OSA are used as replacement areas used for replacement processing due to defects.
The ISA is formed with a predetermined number of cluster sizes (1 cluster = 65536 bytes) from the start position of the data zone.
The OSA is formed with a predetermined number of cluster sizes from the end position of the data zone to the inner circumference side. The sizes of ISA and OSA are described in the DMA.
A section between the ISA and the OSA in the data zone is a user data area. This user data area is a normal recording / reproducing area normally used for recording / reproducing user data.
The position of the user data area, that is, the start address ADus and the end address ADue are described in the DMA.

  Note that, in this example, rewriting using replacement processing can be realized for write-once media that cannot be rewritten normally. That is, when data already recorded in a certain block (area such as a cluster) is to be rewritten, new data is recorded in another block, and this is managed as replacement management information as in the case of defect replacement. In this way, logical overwriting is realized. In such rewriting, basically, a block in the user data area is used as a replacement destination.

  In FIG. 1, the outer peripheral side of the data zone, for example, a radius of 58.0 to 58.5 mm is set as a lead-out zone. The lead-out zone is a management / control information area, and a control data area, a DMA, a buffer area, and the like are formed in a predetermined format. In the control data area, for example, various management / control information is recorded as in the control data area in the lead-in zone. The DMA is prepared as an area in which ISA and OSA management information is recorded as in the DMA in the lead-in zone.

FIG. 2 shows an example of the structure of the management / control information area, and TDMA1 and TDMA2 that can be set in the spare area.
First, in the lead-in zone, areas of DMA2, OPC (test write area), TDMA0, and DMA1 are formed except for an undefined section (reserve) as shown in the figure. In the lead-out zone, areas of DMA3 and DMA4 are formed except for an undefined section (reserve).
Although the above-described control data area is not shown, the illustration is omitted because, for example, a part of the control data area is actually DMA.

  In the spare area, TDMA1 and TDMA2 can be provided as shown. Specifically, TDMA1 can be set in the ISA, and TDMA2 can be set in the OSA. These TDMA1 and TDMA2 can be set as areas for recording new management information when TDMA0 provided in the lead-in zone is used up for updating the management information. That is, when two TDMA1 and TDMA2 are provided as shown in this figure, the management information is updated in the order of TDMA0 → TDMA1 → TDMA2. In this case, only the top address of TDMA1 is fixed, and the end address is variable. In TDMA2, only the end address is fixed and the head address is variable. That is, these TDMA1 and TDMA2 may be size 0.

When the disc is finalized, the management information last updated in the TDMA is written to the DMA. As described above, two DMAs are provided in each of the lead-in zone and the lead-out zone, and a total of four DMAs are provided. The same management information is recorded in these DMA1 to DMA4. That is, for these DMAs, the same management information last updated in TDMA is recorded. By writing a large amount of the same management information in this way, management information can be read more reliably after finalization.
To summarize the above, DMA is not used until the disc is finalized, and replacement management is performed in TDMA. When the disc is finalized, the latest management information recorded in the TDMA at that time is recorded in the DMA, and thereafter, replacement management by the DMA becomes possible.

2. DMA.

The structure of the DMA recorded in the lead-in zone and the lead-out zone is shown in FIG.
In this example, the DMA size is 32 clusters. However, the DMA size is not limited to 32 clusters.
One cluster is 65536 bytes, which is the minimum unit of data recording. In addition, 2048 bytes is a unit called a sector (or data frame), and thus one cluster is 32 sectors (or 32 data frames). Considering the size of user data, the sector and the data frame are the same, but the sector is a physical data unit and the data frame is a logical data unit.
Addresses are assigned on a sector basis. The physical sector address is called PSN (Physical Sector Number) and the logical sector address is called LSN (Logical Sector Number).
In FIG. 3, each of the 32 clusters is represented by cluster numbers 1 to 32, and the data position of each content in the DMA is shown. The size of each content is shown as the number of clusters.

In the DMA, detailed information of a disc is recorded as a DDS (Disc Definition Structure) in a section of four clusters having cluster numbers 1 to 4.
The contents of this DDS will be described with reference to FIG. 4. The DDS has a size of one cluster and is repeatedly recorded four times in the section of the four clusters.

The section of 4 clusters of cluster numbers 5 to 8 is the first recording area (DFL # 1) of the defect list DFL. The defect list DFL is data of a 4-cluster size, and has a configuration in which individual replacement address information (DFL entry and LOW entry described later) is listed.
The section of 4 clusters of cluster numbers 9 to 12 is the second recording area (DFL # 2) of the defect list DFL.
Further, recording areas of the third and subsequent defect lists DFL # 3 to DFL # 6 are prepared for each four clusters, and the section of the four clusters of the cluster numbers 29 to 32 is the seventh recording area (DFL # 7) of the defect list DFL. )
That is, seven recording areas of defect lists DFL # 1 to DFL # 7 are prepared for the 32-cluster DMA.
In the case of a write-once optical disc that can be written once as in this example, in order to record the contents of this DMA, it is necessary to perform a process called finalization. In that case, the seven defect lists DFL # 1 to DFL # 7 written to the DMA are all set to the same content in consideration of compatibility.
The structure of the defect list DFL is substantially the same as that of TDFL (temporary DFL) in TDMA, which will be described later.

FIG. 4 shows the contents of the DDS recorded at the beginning of the DMA shown in FIG.
As described above, the DDS has a size of one cluster (= 65536 bytes).
In FIG. 4, the byte position indicates the first byte of the DDS which is 65536 bytes as byte 0. The number of bytes indicates the number of bytes of each data content.

In two bytes at byte positions 0 to 1, DDS identifier = “DS” for recognizing a DDS cluster is recorded.
The DDS model number (format version) is indicated in 1 byte at byte position 2.
The DDS update count (DDS Update Count) is recorded in 4 bytes at byte positions 4 to 7. In this example, the DMA itself is written with management information at the time of finalization and is not updated, and the management information is performed in TDMA. Therefore, when finalization is finally performed, the number of updates of DDS (TDDS: temporary DDS) performed in TDMA is recorded at the byte position.

In 4 bytes at byte positions 16 to 19, the head physical sector address of the drive area in the DMA is recorded.
In 4 bytes at byte positions 24 to 27, the head physical sector address of the defect list DFL in the DMA is recorded.
The 4 bytes of byte positions 32 to 35 are the start position (ADus in FIG. 1) of the user data area in the data zone, that is, the position of LSN (Logical Sector Number) “0”, PSN (Phisical Sector Number: (Physical sector address).
Four bytes at byte positions 36 to 39 indicate the end position (ADue in FIG. 1) of the user data area in the data zone by LSN (logical sector address).
The 4 bytes at byte positions 40 to 43 indicate the size of the ISA in the data zone.
The 4 bytes at byte positions 44 to 47 indicate the size of the OSA per layer in the data zone.
The 4 bytes at byte positions 48 to 51 indicate the size of the ISA in the data zone (second layer ISA in the two-layer disc).
In one byte at byte position 52, a spare area full flag indicating whether data can be rewritten using ISA or OSA is shown. The replacement area usable flag indicates that the ISA or the OSA has been used up.
In one byte at byte position 54, a disk certification flag (Disc Certification Flag) is shown, which indicates the status of disk certification.
In 4 bytes at byte positions 56 to 59, a verified final address is shown as a last verified address pointer.
Byte positions other than these are reserved (undefined), and are all set to 00h.

In the DMA, management information is recorded with the data structure as described above. However, as described above, these pieces of information are recorded in the DMA when the disc is finalized. In this case, the latest management information in the TDMA is reflected.
Replacement processing for defect management and data rewriting and management information update in accordance with the replacement processing are performed in the TDMA described below.

3. TDMA.
3-1 TDMA structure and TDMS update unit.

Next, TDMA will be described. The TDMA (temporary DMA) is an area for recording management information as in the DMA, but is updated by additionally recording management information in response to occurrence of replacement processing according to data rewrite or defect detection. To go.

FIG. 5 shows the structure of TDMA0. As shown in FIGS. 5A and 5B, the size of the TDMA provided in the management / control information area is, for example, 2048 clusters.
FIG. 5C shows a TDMA0 structure using 2048 clusters.
First, the three clusters CL0, CL1, and CL2 from the top of TDMA0 have a function as an access indicator (access indicator area).
The cluster CL2 is a TDMA1 access indicator, and the cluster CL1 is a TDMA2 access indicator. In these TDMA access indicators, a structure including the latest TDDS (Temporary Disc Definition Structure: described later) is recorded when information is recorded for the TDMA for the first time. Specifically, when information is recorded for the first time in TDMA1, the latest TDDS in TDMA1 is recorded in the TDMA1 access indicator of cluster CL2. Similarly, when information is recorded for the first time in TDMA2, the latest TDDS in TDMA2 is recorded in the TDMA2 access indicator of cluster CL1.
Here, as long as the information is updated in TDMA0, no information is written to each TDMA access indicator. That is, from this, if both the TDMA1 access indicator and the TDMA2 access indicator are unwritten, it is found that the latest management information is in TDMA0 (except for a blank disk). Then, according to the above description, if the TDMA1 access indicator has been written, it is found that the latest management information is in TDMA1, and if the TDMA2 access indicator has been written, the latest management information is in TDMA2. It turns out.

The cluster CL0 is used as a DMA access indicator, and when DMA is recorded at the time of finalization, necessary information in the form shown in FIG. 3 is acquired from the latest TDMS (Temporary Disc Management Structure: described later). And record.
As described above, when both the cluster CL1 and the cluster CL2 are unwritten, the latest TDMS can be acquired from TDMA0. Further, when the cluster CL2 has been recorded, the latest TDMS can be acquired from TDMA1, and when the cluster CL1 has been recorded, the latest TDMS can be acquired from TDMA2.
When the DMA access indicator as the cluster CL0 has already been recorded, the disc is finalized and in a write-inhibited state, indicating that the latest disc information can be obtained from the DMA.
The DMA access indicator also serves as information indicating whether or not the disc has been finalized depending on whether or not it has been written.

Clusters CL3 to CL2047 of TDMA0 are used for updating management information as a TDMS writing area.
A structure constituting management information recorded after the cluster CL3 is referred to as a TDMS (Temporary Disc Management Structure).
The TDMS is additionally recorded in units of TDMS update units having a variable size of 1 to N clusters. In the sequential recording mode, N is set to “4”. In the case of a dual-layer disc, the above N is “8”.
For example, in FIG. 5 (d), one cluster TDMS update unit is first recorded in cluster CL3, then one cluster TDMS update unit is recorded in cluster CL4, and two cluster TDMS update units are further recorded in cluster CL5. It shows the state that was done.
The TDMS is sequentially recorded in successive clusters in units of TDMS update units in this way in accordance with the necessity of updating management information. When recording the TDMS update unit, the latest TDMS update unit is recorded without leaving a gap from the back of the last recorded cluster at that time.

When the recording mode is set to the sequential recording mode for the write-once disc of this example, elements constituting the TDMS are TDDS (Temporary Disc Definition Structure), TDFL (Temporary Defect List), SRRI ( Sequential Recording Range Information), and these elements are always recorded in the same TDMA.
As will be described in detail later, the TDDS mainly includes information for managing the TDMS. The TDFL includes actual replacement information (LOW entry, DFL entry). SRRI is management information of SRR (Sequential Recording Range) recorded in the user data area. The continuous recording range referred to here corresponds to a “track” referred to in, for example, a CD or DVD.

FIGS. 6A, 6B, and 6C show the configuration of the TDMS update unit.
All TDMS update units are assumed to contain a TDDS of one sector size. The TDDS is arranged in the last sector (data frame) of the cluster constituting the TDMS update unit.
When the TDMS update unit includes a TDFL, the TDFL is arranged in a necessary number of sectors (data frames) from the head of the TDMS update unit.
When SRRI is included in the TDMS update unit, the SRRI is arranged in the terminal side of the TDMS update unit, that is, in the required number of sectors (data frames) immediately before the TDDS.
FIG. 6A shows an example of a TDMS update unit including SRRI and TDDS. The TDMS update unit is, for example, one cluster, and the TDDS is arranged in the last sector (data frame 31). If the size of the SRRI is M sectors, the SRRI is arranged in the M sector (from the data frame (31-M) to the data frame 30) immediately before the TDDS.
In this case, since the TDFL is not recorded, the data frame 0 to the data frame (30-M) are set to zero data (00h).
FIG. 6B is an example of a TDMS update unit including TDFL and TDDS. The TDMS update unit is, for example, K cluster, and the TDDS is arranged in the last sector (data frame 31 of cluster K). Assuming that the size of the TDFL is N sectors, the TDFL is arranged from the top to N sectors (data frame 0 of cluster 0 to data frame (x−1) of cluster K. x = mod (N / 32) -1.
In this case, since SRRI is not recorded, the data frame x to data frame 30 of cluster K is set to zero data (00h).
FIG. 6C shows an example of a TDMS update unit including TDFL, SRRI, and TDDS. The TDMS update unit is, for example, K cluster, and the TDDS is arranged in the last sector (data frame 31 of cluster K). If the size of the TDFL is N sectors, the TDFL is arranged from the head to N sectors (data frame 0 of cluster 0 to data frame (x−1) of cluster (K−1)).
The SRRI is arranged in the M sector (from the data frame (31-M) of cluster K to the data frame 30) immediately before TDDS.
If there is a remaining area between TDFL and SRRI as shown in the figure, that area is filled with zero data (00h).
Needless to say, the number of clusters constituting the TDMS update unit varies depending on the size of the TDFL or SRRI.

FIG. 7 shows a state in which the TDMS update unit is additionally recorded. For example, this is a case where a two-cluster size TDMS update unit # 1 is recorded first, and thereafter, # 2, # 3... #X.
For example, when the TDFL needs to be updated, when the SRRI needs to be updated, or when both the TDFL and the SRRI need to be updated, one of the above-described FIGS. 6A, 6B, and 6C. Additional recording of the required form of TDMS update unit is performed. For example, when the SRRI needs to be updated but the TDFL need not be updated, the configuration shown in FIG.
In FIG. 7, TDMS update unit #y is the latest TDMS update unit. Since the TDMS update unit always includes the TDDS, the TDDS of the TDMS update unit #y is the latest valid TDDS.
This latest TDDS indicates a valid SRRI or TDFL.
The TDMS update unit #y in this example is recorded for the SRRI update. Therefore, the latest TDDS indicates the SRRIn in the TDMS update unit #y as a valid SRRI.
At this time, if the TDFLm in the TDMS update unit #x is valid, the latest TDDS indicates the TDFLm in the TDMS update unit #x as a valid TDFL.
That is, the TDMS additionally recorded after the cluster CL3 in the TDMA of FIG. 5 is the TDDS in which the TDDS in the latest TDMS update unit is valid, and the latest SRRI and TDFL are indicated by the TDDS.

3-2 TDDS.

FIG. 8 shows the structure of a TDDS (temporary disc definition structure) recorded as the last sector of the TDMS update unit as described above.
The TDDS is composed of one sector (2048 bytes). The same contents as the DDS in the DMA described in FIG. 4 are included. Although the DDS is one cluster (65536 bytes), the substantial content definition in the DDS is performed up to the byte position 59 of the data frame 0 as described in FIG. That is, substantial contents are recorded in the first sector (data frame) of one cluster. For this reason, even if the TDDS is one sector, the main contents of the DDS contents can be included.

Since the TDDS is recorded in the last sector of the last cluster of the TDMS update unit as described above, it is recorded in byte positions 0 to 2047 as the data frame 31.
The TDDS has the same contents as the DDS from the byte positions 0 to 53. That is, when a DDS is recorded by finalization, these contents in the latest TDDS are reflected and recorded in the DDS.
Note that up to the byte position 53 of the DDS and TDDS, the “TDDS Update Count” at the byte positions 4 to 7 is the DDS update count as can be seen with reference to FIG. 4, but this information represents the TDDS in the TDDS. The value is the number of times created. In TDDS, “first PSN of Defect List (P_DFL)” (defect list start PSN) at byte positions 24 to 27 is used until a disc closing process (a process for prohibiting additional writing) is performed. Takes a value of 0.
In the DDS written to the DMA during the closing process, the value of the latest byte position 4-7 of the TDDS at the time of finalization is written in the byte position 4-7 of the DDS, and the defect list start PSN of the byte position 24-27 Is written.

  In this case, byte positions 53 to 55 and byte positions 57 to 63 sandwiching one byte of byte position 56 “Pre-write Area Flags” are both filled with 0 as reserved areas. The byte positions 64 to 71 are “Status bits of INFO1 / PAC1 locations on L0”, and the byte positions 72 to 79 are “Status bits of INFO1 / PAC2 locations on L0”. Also, byte positions 80 to 87 and byte positions 88 to 95 are “Status bits of INFO1 / PAC1 locations on L1” and “Status bits of INFO1 / PAC2 locations on L1,” respectively. Valid information is written in Furthermore, byte positions 96 to 1023 are reserved areas.

Information not included in the DDS is recorded after the byte position 1024 of the TDDS.
One byte at the byte position 1024 is set to a recording mode, which indicates the recording mode of the disc. Also, 1 byte at byte position 1025 and 2 bytes at byte positions 1026 to 1027 are respectively used as general flag bits and inconsistency flags, and 4 bytes at byte positions 1028 to 1031 are This is a reserved area.
Further, the last physical sector address PSN in which data has been recorded in the user data area is recorded in 4 bytes at byte positions 1032 to 1035. Four bytes at byte positions 1036 to 1039 are a reserved area.

Four bytes at byte positions 1040 to 1051 are allocated as a TDMA size recording area.
That is, 4 bytes at byte positions 1040 to 1043 are recorded with TDMA size (Size of TDMA in Inner Space Area 0) in ISA, that is, size information of TDMS1, and 4 bytes at byte positions 1044 to 1047 are stored in OSA. The size of TDMA2 (Size of TDMAs in Outer Space Area (s)), that is, the size information of TDMA2 is recorded.
In addition, 4 bytes at byte positions 1048 to 1051 are recorded with TDMA size information (Size of TDMA in Inner Space Area 1) in the ISA1 in the case of a dual-layer disc described later.
Note that 36 bytes at byte positions 1052 to 1087 are a reserved area.

Information about the test zone and the calibration zone is recorded in byte positions 1088 to 1095 and byte positions 1104 to 1111, respectively. That is, byte positions 1088 to 1091 are “next available PSN of Test Zone on L0”, and byte positions 1092 to 1095 are “next available PSN of Test Zone on L1”. The byte positions 1104 to 1107 are “next available PSN of Drive Calibration Zone on L0”, and the byte positions 1108 to 1111 are “next available PSN of Drive Calibration Zone on L1”.
Note that 8 bytes at byte positions 1096 to 1103 are reserved areas. In addition, 8 bytes at byte positions 1112 to 1119 are also reserved areas.

Four bytes at byte positions 1120 to 1023 indicate the first PSN of the first cluster of the TDFL (First PSN of 1st Cluster of DFL).
Thereafter, the first PSN of the second to eighth clusters of the TDFL is indicated by 4 bytes.
The first PSN of the first cluster of the TDFL to the first PSN of the first cluster of the TDFL are used as pointers of the TDFL, respectively, and an effective TDFL is indicated as shown in FIG.
The 32 bytes from byte positions 1152 to 1183 are reserved areas.

Also, the first PSN of SRRI (SRPS) of SRRI is indicated in 4 bytes at byte positions 1184 to 1087. The first PSN of this SRRI is used as a SRRI pointer, and this is used to indicate a valid SRRI as shown in FIG.
The 4 bytes at byte positions 1188 to 1191 indicate the first PSN of SBM (first PSN of SBM for L1) in the case of a dual-layer disc.
The 24 bytes at the next byte positions 1192 to 1215 are a reserved area.

Four bytes at byte positions 1216 to 1219 indicate an address (Next available PSN of ISA0) to be recorded next in the ISA.
In addition, 4 bytes at byte positions 1220 to 1223 indicate an address (Next available PSN of OSA0) to be recorded next in OSA.
When ISA or OSA is used in the replacement process, these values are updated as addresses to be written next.
In addition, 4 bytes at byte positions 1224 to 1227 indicate an address (Next available PSN of OSA1) to be recorded next in OSA1 in the case of a two-layer disk, and four bytes at byte positions 1228 to 1231 include a double-layer disk. In the case of ISA1, the next recording address (Next available PSN of ISA1) is indicated.
684 bytes from byte positions 1232 to 1915 are reserved areas.

In 4 bytes from byte positions 1916 to 1919, information on the date of recording (Year / Month / Date of Recording) is shown.
The byte positions 1920 to 2048 indicate a drive ID (Drive ID). As this drive ID, a manufacturer's name (Manufactures Name: 48 bytes), an additional ID (Additional ID: 48 bytes), and a unique serial number (Unique Serial Number: 32 bytes) are recorded.

3-3 TDFL.

Next, the configuration of TDFL (temporary DFL) will be described. As described above, the TDFL is updated by being included in the TDMS update unit.
In FIG. 9, the cluster number / data frame number indicates a cluster number in the TDFL and a sector unit of 2048 bytes. The byte position in the data frame (Byte position in Data frame) indicates the internal byte position in each data frame.

As the contents of the TDFL, 64 bytes from the byte position 0 are used as a TDFL header (Temporary Defect List Header) that stores TDFL management information.
This TDFL header includes information such as information for identifying a TDFL cluster, version, the number of TDFL updates (TDFL recording update), and the number of entries in the TDFL information block (DFL entry / LOW entry).

After byte position 64, there is a temporary list of defects composed of a plurality of information blocks, and the size of each information block is 8 bytes. When N information blocks exist, the size is N × 8 bytes.
One information block of 8 bytes is one replacement information and becomes a DFL entry or a LOW entry.
Although the DFL entry and the LOW entry are substantially the same replacement information, for convenience of explanation, the DFL entry is replacement information of a defective area, and the LOW (Logical Orverwrite) entry is replacement information used for data rewriting.
Since the DFL entry and the LOW entry indicate substantially the same processing (alternate processing), they may be mixed as information blocks in the temporary list of defects.
The temporary list of defects is composed of a plurality of DFL entries and LOW entries, and the total number of DFL entries and LOW entries is 32759 at the maximum in the case of a single-layer disc.
Immediately after the temporary list of defect, a temporary defect list termination (Temporary Defect List Terminator) is recorded in 8 bytes to indicate that the temporary list of defect is finished. Thereafter, the end of the cluster is filled with zeros.

FIG. 10A shows the configuration of an 8-byte DFL entry that is an individual information block. Note that the same format is used for a LOW entry.
Of the 8 bytes (= 64 bits), 4 bits of bits b63 to b60 are set to status 1.
The 28 bits of bits b59 to b32 are used as a replacement source address (first PSN of a replacement source cluster).
The 4 bits of bits b31 to b28 are status 2.
The 28 bits of bits b27 to b0 are used as a replacement destination address (first PSN of the replacement destination cluster).

The meaning of statuses 1 and 2 is shown in FIG.
When the statuses 1 and 2 are “0000” and “0000”, the DFL entry (or LOW entry) is normal replacement information.
That is, the replacement process of one cluster is indicated by the replacement source address and the replacement destination address recorded in the entry. That is, replacement processing based on defect detection or replacement processing for data rewriting is entered.
In the case of a DFL entry indicating a defect replacement, the replacement destination address is an address in the replacement area (ISA, OSA) shown in FIG.
In the case of a LOW entry by a replacement process for data rewriting, the replacement destination address is an address selected in the user data area. However, an area in the ISA and OSA may be used as the replacement destination in this case.

When the statuses 1 and 2 are “0001” and “0000”, the DFL entry indicates a defect cluster that has not been replaced.
Here, even when a defect cluster is found at the time of data writing or the like, the replacement process using ISA and OSA may not be performed. In such a case, the replacement process is not performed, but the defective cluster is registered as one DFL entry.
In the DFL entry, statuses 1 and 2 are “0001” and “0000”, and the defective cluster is indicated as a replacement source cluster of bits b59 to b32. In this case, since no replacement cluster exists, bits b27 to b0 are set to zero data, for example.

When the statuses 1 and 2 are “0000” and “0001”, the entry indicates the start address of burst block replacement.
If the statuses 1 and 2 are “0000” and “0010”, the entry indicates the end address of burst block replacement.
Burst block replacement is replacement processing in which a plurality of physically continuous clusters are replaced together.
That is, in the entries whose statuses 1 and 2 are “0000” and “0001”, the top PSN of the top cluster for the plurality of cluster ranges to be replaced and the top PSN of the top cluster of the plurality of cluster ranges to be replaced are recorded.
Also, in the entries whose statuses 1 and 2 are “0000” and “0010”, the top PSN of the last cluster for the plurality of cluster ranges to be replaced and the top PSN of the last cluster of the plurality of cluster ranges to be replaced are recorded.
With these two entries, a continuous plurality of cluster ranges can be managed as a batch replacement process. In other words, when a plurality of physically continuous clusters are managed together as a replacement, it is not necessary to enter all of the plurality of clusters one by one, but to enter two replacement information for the first cluster and the last cluster. What you need to do.

The DFL entry and the LOW entry are mixed in the TDFL in the same format. However, when the disk of this example is loaded in a device that does not have the ability to rewrite data, both the DFL entry and the LOW entry are used as the DFL entry. As a result, the read-out compatibility is maintained.

3-4 SRR and SRRI.

Next, SRR (Sequential Recording Range) and SRRI (Sequential Recording Range Information) will be described.
The structure of the SRR is shown in FIG. SRR is a writing area (continuous recording range) used in the sequential recording mode for the write-once disk of this example, and is similar to the following tracks <1> to <5 in the CD. It has the following features.

<1> In the SRR, recording is performed in the address increasing direction, and it is possible to have only one recordable address (additional point). The address as the additional writing point is called NWA (Next Writable Address, PSN).
As shown in FIG. 11A, when the last recorded address in the SRR is LRA (Last Recorded Address, PSN), NWA is expressed by the following equation.
NWA = (ip (LRA / 32) + 1) * 32 (if LRA ≠ 0).
NWA = Start PSN of the SRR (if LRA = 0).
Where ip (N) is an integer smaller than N and represents the largest integer.
That is, if recording is performed in the SRR, the NWA is the start address (PSN) of the next cluster after the cluster including the LRA. If the SRR is not yet recorded, the NWA is the start address of the SRR. (PSN).
<2> The SRR takes one of two statuses, Open and Closed.
Here, Open SRR in FIG. 11A represents a recordable (that is, having an NWA) SRR, and Closed SRR in FIG. 11B represents an unrecordable (that is, having no NWA) SRR.
<3> The process of securing Open SRR on the disk is called SRR reserve, and the process of changing the status of Open SRR to Closed is called SRR close.
<4> A plurality of SRRs (up to 7927) can exist on the disk, and among them, up to 16 Open SRRs can exist simultaneously.
<5> SRRs to be written can be selected in any order.

As an actual usage method, Open SRR reserve is used when the file system management information is recorded in the management area after the file data is recorded on the disk while the file system management area is secured in front of the file data. .
FIG. 11C shows a sample layout of the disc when recording is performed in the sequential recording mode.
There are four SRRs (SRR # 1 to SRR # 4) on this disk, SRR # 1, SRR # 3 and SRR # 4 are Open SRR, and SRR # 2 is Closed SRR.
When additional recording is performed on this disc, recording is possible from any of NWA1, NWA3, and NWA4.

SRRI is recorded by the TDMS update unit as information for managing the SRR.
FIG. 12 shows the configuration of the SRRI.
The SRRI is composed of data frames 1 to 31.
The relative data frame number (Relative Data Frame) in FIG. 12 indicates each data frame in the cluster. As described above, the SRRI is arranged immediately before the TDDS recorded in the final data frame 31 of the TDMS update unit. Therefore, if the SRRI is the size of M sectors, the SRRI has a data frame (31-M) to data. Arranged on the frame 30. The byte position in the data frame (Byte position in Data frame) indicates the byte position inside each data frame.

The first 64 bytes of the SRRI are used as an SRRI header (SRRI Header) that stores SRRI management information.
The SRRI header is composed of information identifying the SRRI cluster, information such as version, number of SRRI updates (SRRI record update), total number of SRR entries (blocks indicating SRR information), and the like.
The subsequent byte position 64 and thereafter is a list of a plurality of SRR entries (List of SRRI Entries).
The size of each SRR entry included in the list (List of SRRI Entries) is 8 bytes. When there are N SRR entries, the size of the list is N × 8 bytes.
Immediately after the last SRR entry, an 8-byte SRRI terminator is arranged, and thereafter, the end of the cluster is filled with zeros.

The configuration of the SRRI header is shown in FIG.
Two bytes at byte positions 0 to 1 are used as SRRI-ID (SRRI Identifier) that stores management information of SRRI.
One byte at byte position 2 is an SRRI format (SRRI Format) indicating a version of the SRRI format.
Four bytes at byte positions 4 to 7 are used as an SRRI update count (SRRI Update Count) indicating the number of times of updating the SRRI.
Four bytes at byte positions 12 to 15 are the number of SRR entries (Number of SRR Entries) representing the total number of SRR entries.
One byte at byte position 16 is the number of open SRRs (Number of Open SRRs) indicating the total number of SRRs whose status is open.
From byte position 20, a list of all Open SRR numbers (List of Open SRR Numbers) is recorded.
The structure of this list (List of Open SRR Numbers) is shown in FIG. Each Open SRR number is 2 bytes, a total of 16 sizes, 32 bytes. If the total number of Open SRRs is less than 16, the rest of the list (List of Open SRR Numbers) is filled with zeros. The list (List of Open SRR Numbers) needs to be modified and sorted in descending order whenever the total number of Open SRRs increases or decreases.

FIG. 14 shows the configuration of an SRR entry to be registered in the entry list (List of SRRI Entries) in FIG. 12 following such an SRRI header. Let the entry number be i.
Each SRR entry, each indicating a certain SRR, consists of 8 bytes (64 bits).
Four bits b63 to b60 are reserved (undefined).
The 28 bits of bits b59 to b32 are used as the start address of SRR # i existing in the user data area. That is, the top PSN of the start cluster of SRR # i is indicated.
Bit b31 is a session start, and is a bit indicating whether or not this SRR is the first SRR of the session. When this bit is 1, this SRR indicates that the session starts from the first SRR of the session, that is, this SRR.
Three bits b30 to b28 are reserved (undefined).
In 28 bits of bits b27 to b0, LRA (Last Recorded Address: see FIG. 11) in SRR # i is indicated by PSN.

As described above, the number and address of each SRR existing in the user data area and the LRA of each SRR are managed by the SRRI including the SRRI header and the SRR entry. Further, as described above, the NWA (Next Writable Address) of the open SRR can be calculated from the value of the LRA (Last Recorded Address) in the SRR entry corresponding to the SRR.
Such SRRI is stored in the TDMS update unit when the SRR management state needs to be updated, such as when the SRR is reserved, when an additional recording is made from the NWA in the SRR, or when the SRR is closed. Updated to include SRRI.

3-5 Replacement process using a replacement area.

Here, replacement processing using fixed replacement areas as ISA and OSA will be described.
ISA (inner spare area: inner spare area) and OSA (outer spare area: outer spare area) are reserved on the inner and outer circumferences in the data zone as spare areas for replacement processing of defective clusters. .
The sizes of ISA and OSA are defined in the above-mentioned DDS and TDDS.
The sizes (sizes) of ISA and OSA are determined at the time of initialization, and the subsequent sizes are also fixed.

The replacement process of defect clusters using these ISA and OSA is performed as follows.
For example, when data is written by a request from the host device, if the cluster specified as the write address is a defective cluster, proper data recording cannot be performed. In that case, the data to be recorded is written in a certain cluster in the ISA or OSA. This is a replacement process.
This replacement process is managed as the DFL entry. That is, one DFL entry is registered with the address of the defective cluster that cannot be recorded as the replacement source, and the address of the cluster that has written data in the ISA or OSA as the replacement destination.

When there is a request for writing to the recorded address, that is, data rewriting, the replacement destination for actually recording the data to be written to the target address is selected in the user data area, for example, NWA in the SRR. .
In the case of data rewriting, a LOW entry corresponding to the replacement may be registered. By managing the change of the data position by rewriting with the LOW entry in the TDFL in the TDMA, the data is substantially (for example, as seen from the OS of the host system, the file system, etc.) while being a write-once disk. Rewriting can be realized.

3-6 Additional write processing to next TDMA.

FIG. 15 schematically shows the boundary portion between the lead-in zone and the data zone and the structure in TDMA0 provided in the lead-in zone as a diagram for explaining the additional recording processing to the next TDMA. In this case, TDMA1 is set in the inner spare area.
As described above, the top three clusters of TDMA0 in the lead-in zone are allocated as recording areas for access indicators. As shown in FIG. 15A, the first cluster CL0 is a DMA access indicator, the next cluster CL1 is a TDMA2 access indicator, and the next cluster CL2 is a TDMA1 access indicator. In the state of FIG. 15A, the TDMA1 access indicator, the TDMA2 access indicator, and the DMA access indicator are all unwritten, and no data is written to the TDMS write area of TDMA0. That is, FIG. 15A shows a case where the disc is a blank disc.

Here, as shown in FIG. 15 (b) and FIG. 15 (c), the TDMS writing of TDMA0 is performed as the user data area is recorded several times from the state shown in FIG. 15 (a). It is assumed that TDMS update units are gradually added as TDMS1, TDMS2,.
As shown in FIG. 15 (a) to FIG. 15 (b) → FIG. 15 (c), as long as the TDMS update unit is additionally written in TDMA0, any TDMA access is performed. No information is recorded on the indicator. That is, the fact that the TDMA access indicator is not written represents a case where the latest TDMS exists in the blank disk or TDMA0.

As described above, TDMS is gradually added. For example, when TDMS update unit is added for the Nth time (TDMSn is added), TDMSn is added in the TDMS writing area of TDMA0 as shown in FIG. Suppose that there is no more free space available for writing.
As described above, when there is no additional recording area, TDMS is added to a new TDMA.

  However, in this case, the TDMS is not immediately added to the next TDMA1, but the remaining area in the TDMS writing area of TDMA0 is padded as shown in FIG. 15 (e). The That is, the remaining area in the TDMS writing area of TDMA0 is filled with 0.

After that, TDMS (in this case, TDMSn) is additionally written in TDMA1.
Although not shown in the figure, even when a new TDMS is added to TDMA2, if a blank area remains in the previous TDMA1, the padding is performed for that area.

  In addition, when the TDMS is added to the next TDMA in this way, information is recorded in the corresponding TDMA access indicator. As described above, when TDMS is added to TDMA1 for the first time, information is recorded in the TDMA1 access indicator. When TDMS is added to TDMA2 for the first time, information is recorded on the TDMA2 access indicator.

Here, FIG. 16 shows the data structure in the TDMA access indicator when information recording is performed in response to the first addition to the next TDMA. As shown in FIG. 16, the data structure of the TDMA access indicator is such that the area of all 32 sectors is filled with 32 copies of the latest TDDS.
That is, in response to the first addition to the TDMA1, the TDMA1 access indicator is filled with a copy of the TDDS in the TDMS added to the TDMA1. Similarly, in response to the first addition to TDMA2, the TDMA2 access indicator is filled with a copy of the TDDS in the TDMS that is additionally written in the TDMA2.
As described above with reference to FIG. 8, information on the size of the TDMA is stored in the TDDS. From the information (and the fixed start address of TDMA1 and the end address of TDMA2), the start of each TDMA is stored. Address and end address can be calculated. When these start address and end address are obtained, the latest recorded TDDS in the TDMA indicated by the access indicator can be obtained by examining the last recorded address between them. As described above, the TDDS is written in the last sector in the TDMS.

  In this way, the TDMA access indicator has a function of indicating in which TDMA the latest TDMS exists depending on the presence or absence of writing, and also has a function of indicating the location of the latest TDDS as described above.

Although not illustrated, the DMA access indicator is filled with the DDS generated based on the latest TDDS at the time when the disc is finalized. That is, the DMA access indicator has a function of indicating whether or not the disc has been finalized depending on the presence or absence of writing, and indicating the location of the DDS according to the information content.

4). Configuration of the disk drive device.

Next, a configuration example of a disk drive device (disk drive device 10) corresponding to the write-once disk as described above will be described with reference to FIG.
The disk drive device 10 formats a write-once disk, for example, a disk in which only the pre-recorded information area PIC in FIG. 1 is formed and the write-once area is not recorded on anything. By performing the processing, it is possible to form the disk layout in the state described with reference to FIG. 1, and data is recorded / reproduced in / from the user data area on such a formatted disk. When necessary, TDMA is also updated.

In FIG. 17, the disk 1 loaded in the disk drive device 10 is the write-once disk described above. Note that the disk drive device 10 can perform recording / reproduction on a rewritable disk and reproduction on a ROM disk.
The disk 1 is loaded on a turntable (not shown) and is driven to rotate at a constant linear velocity (CLV) by a spindle motor 52 during a recording / reproducing operation.
Then, an ADIP address embedded as wobbling of the groove track on the disk 1 and management / control information as prerecorded information are read by the optical pickup 51 (optical head).
In initialization format or when user data is recorded, management / control information and user data are recorded on the track in the write-once area by the optical pickup. During reproduction, the data recorded by the optical pickup is read out.

In the pickup 51, a laser diode serving as a laser light source, a photodetector for detecting reflected light, an objective lens serving as an output end of the laser light, and a laser recording light are irradiated onto the disk recording surface via the objective lens. An optical system (not shown) for guiding the reflected light to the photodetector is formed.
The objective lens is held in the pickup 51 so as to be movable in the tracking direction and the focus direction by a biaxial mechanism.
The entire pickup 51 can be moved in the radial direction of the disk by a thread mechanism 53.
The laser diode in the pickup 51 is driven to emit laser light by a drive signal (drive current) from the laser driver 63.

Reflected light information from the disk 1 is detected by a photodetector in the pickup 51, converted into an electric signal corresponding to the amount of received light, and supplied to the matrix circuit 54.
The matrix circuit 54 includes a current-voltage conversion circuit, a matrix calculation / amplification circuit, and the like corresponding to output currents from a plurality of light receiving elements as photodetectors, and generates necessary signals by matrix calculation processing.
For example, a high frequency signal (reproduction data signal) corresponding to reproduction data, a focus error signal for servo control, a tracking error signal, and the like are generated.
Further, a push-pull signal is generated as a signal related to groove wobbling, that is, a signal for detecting wobbling.
Note that the matrix circuit 54 may be integrally configured in the pickup 51.
The reproduction data signal output from the matrix circuit 54 is supplied to the reader / writer circuit 55, the focus error signal and tracking error signal are supplied to the servo circuit 61, and the push-pull signal is supplied to the wobble circuit 58.

The reader / writer circuit 55 performs binarization processing on the reproduction data signal, reproduction clock generation processing using a PLL, etc., reproduces the data read by the pickup 51, and supplies the data to the modulation / demodulation circuit 56.
The modem circuit 56 includes a functional part as a decoder at the time of reproduction and a functional part as an encoder at the time of recording.
At the time of reproduction, as a decoding process, a run-length limited code is demodulated based on the reproduction clock.
The ECC encoder / decoder 57 performs an ECC encoding process for adding an error correction code at the time of recording and an ECC decoding process for correcting an error at the time of reproduction.
At the time of reproduction, the data demodulated by the modulation / demodulation circuit 56 is taken into an internal memory, and error detection / correction processing and deinterleaving processing are performed to obtain reproduction data.
The data decoded up to the reproduction data by the ECC encoder / decoder 57 is read based on an instruction from the system controller 60, and is connected via the interface 64 to a host device 120 such as a personal computer or AV (Audio-Visual). ) Transferred to the device.

The push-pull signal output from the matrix circuit 54 as a signal related to groove wobbling is processed in the wobble circuit 58. The push-pull signal as ADIP information is demodulated into a data stream constituting an ADIP address in the wobble circuit 58 and supplied to the address decoder 59.
The address decoder 59 decodes the supplied data, obtains an address value, and supplies it to the system controller 60.
The address decoder 59 generates a clock by PLL processing using the wobble signal supplied from the wobble circuit 58, and supplies the clock to each unit, for example, as an encode clock during recording.

Further, as a push-pull signal output from the matrix circuit 54 as a signal related to the wobbling of the groove, the push-pull signal as the pre-recorded information PIC is subjected to band-pass filter processing in the wobble circuit 58, and the reader / writer circuit 55 To be supplied. Then, after binarization and a data bit stream, the ECC encoder / decoder 57 performs ECC decoding and deinterleaving to extract data as pre-recorded information. The extracted prerecorded information is supplied to the system controller 60.
The system controller 60 can perform various operation setting processes, copy protection processes, and the like based on the read prerecorded information.

At the time of recording, recording data is transferred from the host device 120. The recording data is sent to the memory in the ECC encoder / decoder 57 via the interface 64 and buffered.
In this case, the ECC encoder / decoder 57 performs error correction code addition, interleaving, subcode addition, and the like as encoding processing of the buffered recording data.
The ECC-encoded data is subjected to, for example, RLL (1-7) PP modulation in the modulation / demodulation circuit 56 and supplied to the reader / writer circuit 55.
As described above, the clock generated from the wobble signal is used as the reference clock for the encoding process during recording.

The recording data generated by the encoding process is subjected to recording compensation processing by the reader / writer circuit 55, and fine adjustment of the optimum recording power and adjustment of the laser drive pulse waveform with respect to recording layer characteristics, laser beam spot shape, recording linear velocity, etc. Etc. are sent to the laser driver 63 as a laser drive pulse.
The laser driver 63 applies the supplied laser drive pulse to the laser diode in the pickup 51 to perform laser emission driving. As a result, pits corresponding to the recording data are formed on the disc 1.
The laser driver 63 includes a so-called APC circuit (Auto Power Control), and the laser output is monitored regardless of temperature or the like while the laser output power is monitored by the output of the laser power monitoring detector provided in the pickup 51. Control to be constant. The target value of the laser output at the time of recording and reproduction is given from the system controller 60, and the laser output level is controlled to be the target value at the time of recording and reproduction.

The servo circuit 61 generates various servo drive signals for focus, tracking, and thread from the focus error signal and tracking error signal from the matrix circuit 54, and executes the servo operation.
That is, a focus drive signal and a tracking drive signal are generated according to the focus error signal and tracking error signal, and the focus coil and tracking coil of the biaxial mechanism in the pickup 51 are driven. Thus, a pickup 51, a matrix circuit 54, a servo circuit 61, a tracking servo loop and a focus servo loop by a biaxial mechanism are formed.
The servo circuit 61 turns off the tracking servo loop and outputs a jump drive signal in response to a track jump command from the system controller 60, thereby executing a track jump operation.
The servo circuit 61 generates a thread drive signal based on a thread error signal obtained as a low frequency component of the tracking error signal, access execution control from the system controller 60, and the like, and drives the thread mechanism 53. Although not shown, the sled mechanism 53 has a mechanism including a main shaft that holds the pickup 51, a sled motor, a transmission gear, and the like, and by driving the sled motor according to a sled drive signal, a required slide of the pick-up 51 is obtained. Movement is performed.

The spindle servo circuit 62 performs control to rotate the spindle motor 2 at CLV.
The spindle servo circuit 62 obtains the clock generated by the PLL processing for the wobble signal as the current rotational speed information of the spindle motor 52 and compares it with predetermined CLV reference speed information to generate a spindle error signal. .
At the time of data reproduction, the reproduction clock (clock serving as a reference for decoding processing) generated by the PLL in the reader / writer circuit 55 becomes the current rotational speed information of the spindle motor 52, and this is used as a predetermined CLV. A spindle error signal can also be generated by comparing with the reference speed information.
The spindle servo circuit 62 outputs a spindle drive signal generated according to the spindle error signal, and causes the spindle motor 62 to perform CLV rotation.
The spindle servo circuit 62 generates a spindle drive signal in response to a spindle kick / brake control signal from the system controller 60, and executes operations such as starting, stopping, acceleration, and deceleration of the spindle motor 2.

Various operations of the servo system and the recording / reproducing system as described above are controlled by a system controller 60 formed by a microcomputer.
The system controller 60 executes various processes in response to commands from the host device 120.
For example, when a write command (write command) is issued from the host device 120, the system controller 60 first moves the pickup 51 to the address to be written. Then, the ECC encoder / decoder 57 and the modulation / demodulation circuit 56 cause the encoding process to be performed on the data (for example, MPEG video data, audio data, etc.) transferred from the host device 120 as described above. Then, recording is executed by supplying the laser drive pulse from the reader / writer circuit 55 to the laser driver 63 as described above.
Further, for example, when a read command for transferring certain data (such as MPEG video data) recorded on the disk 1 is supplied from the host device 120, seek operation control is first performed for the designated address. Do. That is, a command is issued to the servo circuit 61 to cause the pickup 51 to access the address specified by the seek command.
Thereafter, operation control necessary for transferring the data in the designated data section to the host device 120 is performed. That is, data reading from the disk 1 is performed, decoding / buffering and the like in the reader / writer circuit 55, the modem circuit 56, and the ECC encoder / decoder 57 are executed, and the requested data is transferred.
In recording and reproducing these data, the system controller 60 can control access and recording / reproducing operations using the ADIP address detected by the wobble circuit 58 and the address decoder 59.

In addition, at a predetermined time such as when the disc 1 is loaded, the system controller 60 records the unique ID recorded in the BCA of the disc 1 (if the BCA is formed) or a wobbling groove in the read-only area. The prerecorded information (PIC) is read out.
In that case, seek operation control is first performed for the purpose of BCA and pre-recorded data zone PR. That is, a command is issued to the servo circuit 61 to cause the pickup 51 to access the innermost circumference of the disk.
Thereafter, a reproduction trace is performed by the pickup 51 to obtain a push-pull signal as reflected light information, and a decoding process is performed by the wobble circuit 58, reader / writer circuit 55, and ECC encoder / decoder 57, and BCA information and pre-recorded are obtained. Reproduction data as information is obtained.
The system controller 60 performs laser power setting, copy protection processing, and the like based on the BCA information and pre-recorded information read in this way.

FIG. 17 shows a cache memory 60 a in the system controller 60. The cache memory 60a is used for holding and updating TDDS / TDFL / SRRI read from the TDMA of the disk 1, for example.
For example, when the unfinalized disc 1 is loaded, the system controller 60 controls each unit to read out the TDDS / TDFL / SRRI recorded in the TDMA, and stores the read information in the cache memory 60a. Hold on.
Thereafter, when data writing / rewriting or replacement processing due to a defect is performed, SRRI, TDFL, and the like are updated in the cache memory 60a.
For example, when a replacement process is performed by data writing or data rewriting, and SRRI or TDFL is updated, a TDMS update unit may be additionally recorded in the TDMA (or ATDMA) of the disk 1 each time. However, doing so would expedite the TDMA consumption of the disk 1.
Thus, for example, when data is additionally recorded and the LRA (Last Recorded Address) as the SRRI is updated, the SRRI is updated in the cache memory 60a for a certain number of times, and the cache memory is stored at a certain time. A method is adopted in which the SRRI that has been updated in (1) is recorded on the disc 1 by the TDMS update unit.
Also, for example, until the disk 1 is ejected from the disk drive device, the TDFL / SRRI is updated in the cache memory 60a, and the final (latest) in the cache memory 60a is ejected. A method of writing the TDFL / SRRI in the TDMA of the disk 1 is also conceivable.

When the host device 120 is, for example, a personal computer, the host device 120 includes a CPU 101, an interface 102, an HDD 103, a ROM / RAM 104, and a user interface 105.
The interface 102 communicates commands and recording / reproduction data with the disk drive device 10.
An HDD (hard disk drive) 103 is used to store AV data, application programs, and the like.
The ROM / RAM 104 is used as a work area for the CPU 101 and for storing programs started by the CPU 101.
The user interface 105 indicates a part or device that performs input / output for a user, such as a display unit for video / characters such as a monitor display, an audio output unit such as a speaker, and an operation input unit such as a keyboard and a switch.
Such a host device 120 is a device that uses the disk drive device 10 as a storage device for AV data in accordance with an application program activated by the CPU 101.
The host device 120 is assumed not to be a personal computer, but to be a video camera, an audio system, an AV editing device, and other various devices as an actual form.

5. Conventional blank disc determination processing.

Here, as described above, the TDMA1 access indicator and the TDMA2 access indicator are provided in the TDMA0, and these TDMA access indicators indicate which TDMA has the latest TDMS depending on the presence or absence of the writing.
At this time, if both TDMA access indicators are unwritten, there is either the latest TDMS in TDMA0 or a blank disk (that is, data is not yet written in the user data area). Will be shown. In this case, whether or not the disk is a blank disk can be determined by examining whether or not the TDMA0 is actually written.
Conventionally, based on such an idea, blank disc determination processing using an access indicator has been performed as follows.

FIG. 18 is a flowchart showing a conventional blank disk determination process.
First, in step S1, the access indicator is read. That is, the DMA access indicator, the TDMA2 access indicator, and the TDMA1 access indicator are read by reading the first three clusters of TDMA0.
First, in step S2, it is determined whether or not the DMA access indicator has been written. If the DMA access indicator has been written, it is known that it has been finalized and that the latest DMS is in the DMA.
If it is determined in step S2 that the DMA access indicator has been written, the process proceeds to step S3 to perform processing for acquiring the DDS in the DMA access indicator. As a result, the replacement management information / disk management information used in the subsequent processing is acquired.

  If it is determined in step S2 that the DMA access indicator has not been written, after setting N = 2 in step S4, it is determined in step S5 whether the TDMA [N] access indicator has been written. To do. That is, when N = 2, it is determined whether or not the TDMA2 access indicator has been written. If a negative result is obtained in step S5, N = N-1 is set in step S7 as shown in the figure, and if it is determined in step S8 that N = 0 is not satisfied, the determination in step S5 is performed again. In this case (N = 1), it is determined whether or not the TDMA1 access indicator has been written.

If it is determined in step S5 that the TDMA [N] access indicator has been written, the process proceeds to step S6, and the TDDS in the TDMA [N] access indicator is acquired. In this case, since the DMA access indicator has not been written in the previous step S2, it is known that the disc has not been finalized. Further, since the TDMA [N] access indicator has been written, it is found that the latest TDDS is in the TDMA [N] access indicator.
If the TDDS in the TDMA [N] access indicator is acquired in step S6 as described above, the last recorded address in TDMA [N] is set based on the information content of this TDDS as described above. The latest TDDS in TDMA [N] can be obtained.

If N = 0 in the previous step S8, that is, if both the TDMA2 access indicator and the TDMA1 access indicator are unwritten, then in step S9, in the TDMS write area in TDMA0. Check whether or not to write to. Then, in the subsequent step S10, it is determined whether or not the result of this check processing is no writing. If it is determined that there is no writing, blank disk determination is performed in step S11.
If it is determined that there is no writing, the process proceeds to step S12, and the latest TDDS at the last recorded address of TDMA0 is acquired.

Here, the blank disk determination based on the writing presence / absence check described in steps S9 to S12 and the process of obtaining the TDDS at the last recorded address are actually performed by a binary search as shown in FIG. Has been.
In FIG. 19, this binary search is a process of searching for the latest TDDS at the final recorded address on the assumption that TDMA0 has been written. That is, as a result of this search, when it is determined that the TDMS writing area of TDMA0 has not been written, it can be determined that the disk is a blank disk.
Specifically, first, in this case, the presence / absence of writing is checked at the required position (A) in the TDMS writing area of TDMA0. As described above, the TDMS update unit is added in ascending order of address, so if it is determined that writing has been completed, the presence / absence of writing is checked again at the position C after this A. Do. In the case where there is writing, the process of proceeding to the rear side and checking whether or not writing is repeated is repeated, whereby the final recorded address of D can finally be specified. In this case, the TDDS in the last sector is the latest TDDS and is acquired.
On the other hand, if writing is not performed at the previous position A, the presence / absence of writing is checked again at the position B where the address is younger. If there is no writing in B, the same check is performed at a position where the address is younger. In this way, the operation of performing the check on the front side is further repeated in the case where the writing has not been performed, and in the event that no point has been written in the end, the TDMS writing area of TDMA0 may be unwritten. Prove. The previous step S10 corresponds to determining whether or not it has been found that there is no writing in the TDMS writing area of TDMA0 as a result of such a check being repeated in order on the younger side of the address. If there is no writing in the TDMS writing area of TDMA0 as described above, it is determined that the disk is a blank disk.

6). Blank disk determination processing of the present embodiment.

The blank disk discrimination process as the present embodiment will be described with reference to the flowchart of FIG.
The configuration of the disk drive apparatus according to the present embodiment is the same as that described with reference to FIG. 17, and the processing operation shown in FIG. 20 is performed by the system controller 60 shown in FIG. It starts according to things.

  First, in step S101, a process for reading four clusters from the head of TDMA0 is executed. That is, the servo circuit 61 is instructed to read data for the first four clusters in TDMA0. The read data is supplied to the system controller 60 and stored (cached) in a required memory such as the internal cache memory 60a.

Then, the following steps S102 to S105 are provided as discrimination processing based on the data read in this way.
That is, first, in step S102, it is determined whether or not the first cluster is a written first cluster. In other words, this process corresponds to determining whether or not the disk has been finalized on which the DMA access indicator has been written.
If an affirmative result is obtained in step S102 that the first cluster is the written first cluster, the DDS in the DMA access indicator is acquired in step S106 as in the conventional method described above.

  If a negative result is obtained in step S102 that the first cluster is not the written first cluster, the process proceeds to step S103 to determine whether or not the second cluster is the written first cluster. . The second cluster from the top is a TDMA2 access indicator. Therefore, if a positive result is obtained in step S103, the process proceeds to step S107, and the TDDS in the TDMA2 access indicator is acquired in the same manner as in the previous conventional method.

  On the other hand, if a negative result is obtained in step S103 that the second cluster is not the written first cluster, the process proceeds to step S104 to determine whether or not the third cluster is the written first cluster. Since the third cluster is the TDMA1 access indicator, if it is determined in step S104 that the cluster is the written first cluster, the process proceeds to step S108, and processing for obtaining the TDDS in the TDMA1 access indicator is executed. .

If a negative result is obtained in step S104 that the third cluster is not the written first cluster, it is determined in step S105 whether the fourth cluster is the written first cluster.
Here, the fourth cluster is the leading cluster of the TDMS writing area of TDMA0. Therefore, it is possible to know whether or not TDMS has been written in TDMA0 by checking whether or not the fourth cluster is the written first cluster as in step S104.

If a negative result is obtained in step S105 that the fourth cluster is not the written first cluster, the process proceeds to step S109 to determine that the disk is a blank disk. As the actual processing in step S109, for example, processing for setting a flag indicating that the disc is a blank disc is executed.
If an affirmative result is obtained in step S105 that the fourth cluster is the written first cluster, processing for obtaining the TDDS at the last recorded address in TDMA0 is executed in step S110. . For example, in this case as well, in order to obtain the TDDS at the last recorded address, a binary search similar to the conventional method described above may be performed.

  As described above, according to the blank disk determination processing of the present embodiment, writing into the TDMS writing area of TDMA0 is performed by reading four clusters at a time instead of reading only the top access indicator of TDMA0. The presence or absence can be determined at a time. That is, it is not necessary to perform a seek operation for examining the writing state in the writing area of TDMA0 as in the conventional method, and blank disk determination can be performed more quickly.

Here, since the binary search of the conventional method described above is performed on the assumption that the latest TDDS at the last recorded address is searched, the written / unwritten check start point is an intermediate point in the TDMS writing area. It will be set near the point. That is, it takes a certain amount of time to determine that the TDMS writing area is not yet written.
That is, in this respect as well, there is a corresponding delay in determining whether or not the conventional method is a blank disc. When compared with such a conventional method, according to the method of this embodiment, the blank disc Judgment can be made much faster.

  In the above description, the case where the disk 1 is a single-layer disk (SL) has been described as an example. However, the present invention can be suitably applied to a disk having two or more layers. .

Here, FIG. 21 shows the area structure of the disk in the case of a dual layer (DL).
As shown in the figure, in the case of DL, the area structure of the first layer is almost the same as the area structure in the case of SL except that the lead-out area is not formed. However, in this case, the data zone is set to “Data Zone 0” to be distinguished from the data zone of the second layer. Furthermore, the inner spare area (ISA) and the outer spare area (OSA) in the data zone are also referred to as “ISA0” and “OSA0”, respectively, in order to distinguish them from those in the second layer.
Further, in this case, since the recording directions are different between the first layer and the second layer, the outer peripheral portion from the data zone becomes an interlayer folded portion. As shown in the figure, this folded portion is called an outer zone. The outer zone in the first layer is “Outer Zone 0”, and the outer zone in the second layer is “Outer Zone 1”.

  The data zone in the second layer is “Data Zone 1”. Further, the outer spare area in the second layer is “OSA1”, and the inner spare area is “ISA1”. An area on the inner circumference side from the data zone of the second layer is a lead-out area. As shown in the figure, the lead-in area is formed in the first layer, the inner peripheral area from the data area is “Inner Zone 0”, and the inner area from the data area in which the lead-out area is formed in the second layer. The area is also called “Inner Zone 1”.

As shown in the figure, the TDMA in the case of DL is provided with a fixed TDMA0 in the lead-in area and a fixed TDMA1 in the lead-out area. That is, there are two fixed TDMAs, one for each layer. For other TDMAs, one can be set in the inner spare area and one in the outer spare area in both the first layer and the second layer. In this case as well, each TDMA in these data zones is fixed in size only at either the start address or the end address, and the size is variable. As shown in the figure, the TDMA in the inner spare area (ISA0) of the first layer is TDMA2, and the TDMA in the outer spare area (OSA0) is TDMA3. The TDMA in the outer spare area (OSA1) of the second layer is TDMA4, and the TDMA in the inner spare area (ISA1) is TDMA5.
Thus, in the case of DL, there can be a maximum of 6 TDMAs.

In order to correspond to the area structure shown in FIG. 21, in the case of DL, the access indicator in TDMA0 is changed to the structure shown in FIG.
In FIG. 22, the access indicator is still provided in the head area of TDMA0, but in this case, a total of five access indicators are provided as TDMA access indicators after the DMA access indicator of the first cluster. As shown in the figure, the next cluster (second cluster) of the DMA access indicator is the TDMA5 access indicator, the next third cluster is the TDMA4 access indicator, the next fourth cluster is the TDMA3 access indicator, and the next five clusters. The first is the TDMA2 access indicator, and the next sixth cluster is the TDMA1 access indicator.
Also in this case, the handling of each TDMA access indicator is the same as in the case of SL. That is, when a TDMS update unit is written to TDMA [n] after TDMA0 for the first time, the TDMA [n] access indicator is filled with a copy of the TDDS in the added TDMS.

Here, in the case of such a DL, when determining a blank disk, together with the DMA access indicator and each TDMA access indicator, a total of 7 clusters including one cluster in the TDMS writing area of TDMA0 as shown by hatching in FIG. Are read at once. As a result, when the last seventh cluster is not the recorded first cluster, it is determined that the disk is a blank disk.
As a result, even in the case of DL, it is not necessary to wait for the result of the binary search in the TDMS written area of TDMA0 as in the conventional case, and the blank disk can be determined more quickly.

Although the embodiments of the present invention have been described above, the present invention should not be limited to the specific examples described above.
For example, in the description so far, the case where the blank disk determination is performed corresponding to the write-once medium is illustrated, but the blank disk determination can be performed similarly for the rewritable medium.
In addition to the Blu-ray Disc, “a user data recording area in which user data can be recorded and temporary management information to be updated in accordance with the data recording in the user data recording area are sequentially recorded. The temporary management information recording area and the first temporary management information recording area, and the first temporary management information recording area is newly used when the temporary management information is used for updating the temporary management information. Temporary management in which the latest management information is recorded when the temporary management information is recorded for the first time in one or more second temporary management information recording areas where temporary management information is recorded. An area usage status presentation information recording area for sequentially recording area usage status presentation information for indicating an information recording area is provided, and in the first temporary management information recording area, If the serial temporary management information when the recording medium "is to be recorded for the interval subsequent to the area-use-state presenting information recording area, it is possible to suitably apply the present invention.

In the above description, the reproducing apparatus of the present invention corresponds to a disk-shaped recording medium. However, the present invention is also suitably applied to a case where the recording medium has a shape other than the disk-shaped recording medium. In this case as well, data recording / non-recording determination in the user data recording area can be performed quickly.
In the description so far, the case where the playback device of the present invention is configured to be connected to the host device has been illustrated, but there may be a mode in which the playback device is not connected to other devices. In that case, an operation unit and a display unit are provided, and the configuration of the interface portion for data input / output is different from that in FIG. That is, it is only necessary that recording and reproduction are performed in accordance with a user operation and a terminal portion for inputting / outputting various data is formed.
In the above description, the case where the reproducing apparatus of the present invention is a recording / reproducing apparatus capable of recording is exemplified. However, it is of course possible to adopt a reproduction-only apparatus having no recording function.

It is explanatory drawing of the area structure of the disc of embodiment of this invention. FIG. 3 is an explanatory diagram showing a structure example of a management / control information area of a disk and TDMA settable in a spare area according to the embodiment. It is explanatory drawing of DMA of the disk of embodiment. It is explanatory drawing of DDS of the disk of embodiment. It is explanatory drawing of the structure of TDMA0 of the disk of embodiment. It is explanatory drawing of the TDMS update unit of embodiment. It is explanatory drawing of the additional writing state of the TDMS update unit of embodiment. It is explanatory drawing of TDDS of the disk of embodiment. It is explanatory drawing of TDFL of the disk of embodiment. It is explanatory drawing of the DFL entry of the disk of embodiment. It is explanatory drawing of SRR of the disk of embodiment. It is explanatory drawing of SRRI of the disk of embodiment. It is explanatory drawing of the SRRI header of the disk of embodiment. It is explanatory drawing of the SRR entry of the disk of embodiment. It is explanatory drawing about the postscript process to next TDMA. It is the figure which showed the data structure in a TDMA access indicator. 1 is a block diagram showing an internal configuration of a disk drive device according to an embodiment. It is a figure for demonstrating the conventional blank disc determination method. It is explanatory drawing about a binary search. It is the flowchart which showed the blank disk determination process of embodiment. It is the figure which showed the area structure example of the disk in the case of a dual layer disk. It is the figure which showed the structural example of TDMA0 in the case of a dual layer disk.

Explanation of symbols

  1 disk, 10 disk drive device, 51 pickup, 52 spindle motor, 53 thread mechanism, 54 matrix circuit, 55 reader / writer circuit, 56 modulation / demodulation circuit, 57 ECC encoder / decoder, 58 wobble circuit, 59 address decoder, 60 system controller , 60a cache memory, 61 servo circuit, 62 spindle servo circuit, 63 laser driver, 64, 102 interface, 101 CPU, 120 host device

Claims (2)

A user data recording area where user data can be recorded;
A first temporary management information recording area in which temporary management information to be updated according to data recording for the user data recording area is sequentially recorded;
When the first temporary management information recording area is provided in the first temporary management information recording area and the first temporary management information recording area is used up for updating the temporary management information, the temporary management information is newly recorded. An area for indicating a temporary management information recording area in which the latest management information is recorded when the temporary management information is recorded for the first time with respect to one or a plurality of second temporary management information recording areas. An area usage status presentation information recording area where the usage status presentation information is sequentially recorded is provided, and the temporary management information is stored in the area usage status presentation information recording area in the first temporary management information recording area. A playback device that at least plays back a recording medium that is to be recorded for a subsequent section,
Reading means for reading from the recording medium;
A reading control process for causing the reading means to execute reading for at least the area use state presentation information recording area and a predetermined section following the area at once ;
Based on the result of determining whether or not data is recorded only in the predetermined section from the read result obtained according to the read control process, the recording / non-recording state of data in the user data recording area is determined. Control means for executing determination processing;
A playback apparatus comprising: A user data recording area where user data can be recorded;
A first temporary management information recording area in which temporary management information to be updated according to data recording for the user data recording area is sequentially recorded;
When the first temporary management information recording area is provided in the first temporary management information recording area and the first temporary management information recording area is used up for updating the temporary management information, the temporary management information is newly recorded. An area for indicating a temporary management information recording area in which the latest management information is recorded when the temporary management information is recorded for the first time with respect to one or a plurality of second temporary management information recording areas. An area usage status presentation information recording area where the usage status presentation information is sequentially recorded is provided, and the temporary management information is stored in the area usage status presentation information recording area in the first temporary management information recording area. A determination method for determining a recording / unrecorded state of data in the user data recording area for a recording medium that is to be recorded for a subsequent section,
A reading step for performing reading at least for the area utilization status presentation information recording area and a predetermined section subsequent thereto;
A determination step for determining a data recording / unrecorded state in the user data recording area based on a result of determining whether or not data is recorded only in the predetermined section from a reading result of the reading step;
A determination method comprising:

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