JP3363859B2 - Optical disk and optical disk drive - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc which is rotationally driven at a constant angular velocity to read and write data, and in particular, a recording surface is divided into a plurality of zones, and a clock having a higher frequency is used in outer zones. The present invention relates to an optical disc in which the recording linear density is made substantially constant on the inner circumference side and the outer circumference side by performing writing and reading by writing.

The present invention also relates to an optical disk which can be used as a recording medium of a different type for each zone and which can change the setting of the type of medium in each zone.

The present invention further relates to a drive device used for writing and reading the above-mentioned optical disc and a method for writing and reading the optical disc.

[0004]

2. Description of the Related Art As a conventional optical disc of this type, EC
There is a single-sided 1 GB optical disc having the format proposed in MA / TC 31/92/36. According to this proposal, the recording surface of the optical disk is evenly divided into a plurality of zones by its radial position, that is, by one or more circumferential boundaries, that is, the number of physical tracks in each zone is the same. It is divided into Although the number of zones differs depending on the sector size, for example, 512 bytes / sector is divided into 54 zones, and 1024 bytes / sector is divided into 30 zones.

Each physical track has an integer number of sectors. The number of sectors in each track is the same in each zone. The more outer the zone, the greater the number of sectors in each track.

In addition, whether or not writing is possible on the optical disc
Depending on the mode, there are an R / W type in which data can be written any number of times, a WO type in which data can be written only once, and an O-ROM type in which data can be written in advance at the time of disk production and writing cannot be performed thereafter.

[0007]

In the conventional optical disc, since the number of sectors of one track is different for each zone,
For example, as a SCSI device, when a linear (continuous integer) logical address is given from a higher-level device, an algorithm for determining the physical position of a target sector becomes complicated. Further, the data part of the sector in the outermost or innermost physical track of each zone may be adjacent to the header part of the sector of the innermost or outermost physical track of the adjacent zone. There was a problem that the effect of crosstalk from the department could be great. This is because the information in the data section is written magneto-optically, whereas the information in the header section is written in the form of pits, and the data in the header section has a higher degree of modulation. In each zone, the header parts are adjacent to each other, the data parts are adjacent to each other, and the header part and the data part are not adjacent to each other, so that the problem of such crosstalk is small.

Further, as described above, the optical disc has R
There are a / W type, a WO type, and an O-ROM type, and it is desired to mix these in the same disc to expand the use of the optical disc. However, conventionally, there is only a P-ROM type having an R / W type memory area and an O-ROM type memory area on one disk.

The present invention has been made in order to solve the above problems, and it is possible to easily and quickly find the physical position of a target sector on a disk according to an address given from the outside. It is an object of the present invention to provide an optical disc capable of performing the above.

Another object of the present invention is to eliminate the error and disturbance of the reproduced signal due to the crosstalk of the tracks located near the boundary between the adjacent zones.

Another object of the present invention is to mix recording areas of different types on one optical disk and expand its application.

Another object of the present invention is to provide a driving device used for driving the above-mentioned optical disc and a method for writing and reading the optical disc.

[0013]

An optical disc according to claim 1, wherein
The discs are provided in the recording area, and each
Provided on the physical track and the physical track,
A section including a header area in which an address is recorded in each
A logical track with a fixed number of sectors
The address recorded in the header area of each sector.
By specifying, each sector will be in one of the above logical tracks.
It can be specified that it belongs to the beginning of the address of each sector.
A predetermined number of bits from the
It represents the address of the physical track,
A predetermined number of bits from the end in the logical track
It represents the position of the sector in the
It is composed of n-th power sector (n is an integer)
In addition, the above addresses must be serial numbers using binary numbers.
Is characterized by. The optical disk drive device according to claim 2.
Is an optical disk drive for driving the optical disk according to claim 1.
Device from the beginning of the address of each sector.
Logical sector containing the sector based on a defined number of bits
Characterized by having means for specifying the address of the rack
To do. The optical disk drive device according to claim 3
An optical disk drive device for driving the optical disk described in 1.
A predetermined number of addresses from the end of each sector address.
The position of the sector in the logical track based on the bit
It is characterized by having a means for specifying the position. Claim 4
The optical disk drive apparatus according to claim 1 is the optical disc drive according to claim 1.
A disk drive device for driving a disk,
Based on a predetermined number of bits from the beginning of the address
Specify the address of the logical track that contains the sector.
Means and the end of the address of each sector
The sector within a logical track based on a number of bits
And means for specifying the position of .

[0014]

According to the optical disk of claim 1, each logical track is
The sector consists of 2n sectors, and
Since the address is a serial number using a binary number,
The calculation for identifying the target sector becomes easier. Well
In addition, a predetermined number of bits from the beginning of the address
Since the track address is used, the logical
It is easy to identify the hook. Furthermore, the end of the address
A predetermined number of bits from the
Since the position of the target is displayed,
It becomes easy to identify the data. The optical disk drive device according to claim 2.
According to the predetermined from the beginning of each sector address
Logical track containing the sector based on a number of bits
Address of the target logical track.
Identification can be easily performed. The optical disc according to claim 3.
According to the drive device, from the end of the address of each sector
In a logical track based on a predetermined number of bits
Position of the target sector is specified.
Identification can be easily performed. The optical disc according to claim 4.
According to the drive device, from the beginning of the address of each sector
The theory that the sector is included based on a predetermined number of bits
The logical track address is specified, so the desired logic
The track can be easily specified. Also, each
From the end of the sector address to a predetermined number of bits
Locate the sector within the logical track based on
Therefore, it is easy to identify the target sector.
You can

[0015]

EXAMPLE 1 First, an optical disk according to Example 1 of the present invention will be described with reference to FIGS.
Will be described with reference to. 1 and 3 show a first embodiment of the present invention.
It is a figure which shows the structure of the optical disc of FIG. The guide groove 1 is previously formed in a spiral shape on the optical disc 2. The light spot 3 is an optical system (not shown) that focuses light from a light source (not shown) to form the land portion 1 between the guide grooves 1.
Irradiate 2. The header section 4 includes a sector address 5 and a track address 6. The header portion 4 is composed of pits formed on the land portion 12 by embossing or stamping, and is formed at the time of disc production. That is, it is pre-formatted. On the other hand, in the data section 7, data is written and read magneto-optically. The information in the header portion 4 and the data in the data portion 7 written in the form of pits are read by the same light beam. The header section 4 and the data section 7 form a sector 8.

Each physical track 9 corresponds to one rotation of the optical disk 2 and is divided into an integer number of sectors. An integral number of physical tracks are collected in zones 10, 10a, 10
b, 10c. That is, a normal recording area (user zone) on the recording surface of the optical disc 2 is divided into a plurality of zones by a plurality of concentric circles centered on the center of the optical disc, and each of the physical tracks 9 in the recording area is any one. Belongs to the zone. In this embodiment, as shown in FIG. 5, it is divided into 31 zones (zones # 0 to # 30). Outermost zone # 0 and innermost zone # 30
Consists of 741 physical tracks, the other zones are 7
It consists of 40 physical tracks. The outermost zone 10a has the largest number of sectors, and the inner zone has fewer sectors. The difference in the number of sectors per physical track between adjacent zones is 1 or more, which is 1 in the illustrated example.

In use, regardless of which zone of the disk the write / read head is accessing,
The disc is rotationally driven at a constant angular velocity.

Since the recording linear density is made substantially constant over the entire recording area (user area) of the disc, the frequency of the clock used for recording is changed or switched depending on which zone the data is recorded. Higher frequencies are used in the outer zone.

During reading, the frequency of the clock is switched as the write / read head moves from one zone to another.

Innermost track 11b of zone 10b
And the outermost track 11c of the zone 10c is shown in FIG.
As shown in FIG. 3, since the number of sectors constituting one physical track is different, a part of the track header portion 4-1 of the track 11b and the data portion 7-2 of the track 11c, the track 11c.
Header part 4-2 and part of the data part 7-1 of the track 11b are adjacent to each other.

In the physical structure as described above, a logical track is formed by an integer number of sectors, and a rotation group is formed by an integer number of logical tracks. In the illustrated example, each logical track is composed of 17 sectors. 10 for each sector
It has a length of 24 bytes. Each rotation group corresponds to each zone, and the outer peripheral edge and the inner peripheral edge of each rotary group substantially coincide with the outer peripheral edge and the inner peripheral edge of the corresponding zone, respectively. Hereinafter, the correspondence between each zone and the rotation group, the relationship between the number of physical tracks in each zone and the number of logical tracks in each rotation group, and the like will be described with reference to FIG. In FIG. 5, the symbols at the top of each column have the following meanings.

ZN: Zone number S / R: Number of sectors per rotation (one physical track) PT / Z: Number of physical tracks in the corresponding zone S / Z: Number of sectors in the corresponding zone: S / R × PT / Z ΣS / Z: Cumulative number of sectors (S / Z) in each zone LT / G: Number of logical tracks in the corresponding rotation group ΔLT / G: Difference in number of logical tracks (LT / G) between adjacent rotation groups S / G: Number of sectors in the relevant rotation group: LT / G x 1
7 ΣS / G: Cumulative number of sectors (S / G) in each rotation group DΣS: Difference between the total number of sectors in each zone and the total number of sectors in each rotation group: ΣS / G-ΣS / Z Multiple logical tracks Gather together to form one rotation group. Each rotation group corresponds to each zone. The number of logical tracks forming each rotation group is determined so that the number of sectors belonging to each rotation group becomes substantially equal to the number of sectors belonging to the corresponding zone. As a result, the start point and the end point (represented by the value of ΣS / G) of each rotation group do not always match the start point and the end point (represented by the value of ΣS / Z) of the corresponding zone, and a deviation of several sectors occurs. . The beginning of the first rotation group and the beginning of the first zone coincide. The cumulative difference in FIG. 5 (the rightmost column: represented by the value of DΣS) represents the deviation between the start point and the end point, and is the sector of the last part of each rotation group, not the corresponding zone, Shows the number of things located in the next zone. Of the sectors of the last rotation group, those that protrude from the last zone (12 sectors in the example shown) are formed in a spare area of the recording surface (provided inside the innermost zone).

In the disk in which the logical tracks are arranged in this way, the track address and sector address written in the header part of the disk are as they are, and the linear logical address (represented by a one-dimensional continuous integer) from the host device. Therefore, there is an advantage that the actual sector address and track address can be calculated by a simple integer operation. Further, if the zones are different, the number of sectors for one rotation is different, but the number of sectors for one logical track is constant (in the example shown in FIG.
7 "), there is an advantage that it need not be considered in the above calculation.

Further, the physical track address and the sector address indicating the physical position of the sector on the disk can be obtained from the logical track address and the sector address by a simple calculation.

Second Embodiment Next, an optical disc of a second embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is a conceptual diagram showing a part of the optical disc of the second embodiment, and FIG. 7 is a table showing the logical track structure of the second embodiment. As shown in FIG. 6, in the vicinity of the boundary 13 between the adjacent zones, at least one physical track 14 or 15 in each zone is designated as a guard track, and no data is recorded here by the user. Further, at least one physical track 16 in each zone is designated as a test track, and no data is recorded by the user here. In the illustrated example, the innermost physical track 14 of each zone is designated as a guard track, the outermost physical track 16 of each zone is designated as a test track, and the second physical track 15 from the outer side of each zone is designated. Designated as a guard track.

The guard tracks 14 and 15 are for avoiding crosstalk near the zone boundaries.
The guard track is given an address (track address and sector address) independent of the track on which data is recorded. The address of the guard track is outside the range of addresses given to the sector used for recording data. As a result, the guard track is not accessed when recording and reading data. Thus, the guard track is not used for recording data.

The test track 16 is used for adjusting the recording power. For example, when the driving device is powered on, the test track is recorded and reproduced while changing the recording power. The optimum recording power is obtained by detecting the error rate in the recording power.

As shown in the figure, when the track between the guard tracks 14 and 15 is designated as the test track 16, even if the test data is recorded with an excessive power, the track used for recording the normal data. Has the advantage of not being affected. However, it is possible to specify another physical track as the test track.

Addresses are also given to the test tracks independently of the data recording sectors. The address of the test track is outside the range of addresses given to the sectors used for recording data. As a result, the test rack is not accessed when recording and reading data. Thus, the test track is not used for recording data.

A track other than the guard track and the test track is used as a data recording track, and 17 sectors are defined as one logical track to form a logical track. At this time, the number of logical tracks is determined such that the number of logical tracks is a constant value, that is, 43 in the illustrated example, between adjacent rotation groups. In this way, the number of logical tracks can be calculated by a simple integer operation, so that management by a table is unnecessary.

FIG. 7 shows the logical track structure of the second embodiment. This logical track structure is generally the same as that of FIG. However, zones # 0 and # 30 are the other zones # 1
.About. # 29 and the same 740 physical tracks.

In FIG. 7, the symbols in the upper part of each column that are the same as those in FIG. 5 have the same meaning as in FIG. G + T represents the number of sectors of the guard track and test track of each zone.

The second embodiment is superior to the first embodiment in the following points. That is, in the first embodiment, the rear end of the last logical track of each rotation group does not coincide with the rear end of the corresponding zone and is slightly protruded, and the number of protruding sectors is not constant as can be seen in FIG. . In this case, it is necessary to control clock switching within the logical track. Therefore, it is not necessary to perform double management of alternation processing (processing for accessing a spare sector in the same rotation group instead of a defective sector) and control by actual physical arrangement (clock switching, etc.). The disadvantage is that it must not be. In addition, there is a problem that crosstalk may occur between adjacent physical tracks in the vicinity of the zone boundary. Further, there is no test track for each rotation group, and it is not possible to adjust the recording power sufficiently. Further, there is no regularity between the number of logical tracks of each rotation group, and a table storing the number of logical tracks in each rotation group is provided, and at the time of access, the table is referenced to perform conversion from a logical address to a physical address. There is a need.

The logical track structure of the second embodiment shown in FIG. 7 solves the problems of the first embodiment as described above, and the logical tracks of each rotation group do not protrude from the corresponding zone. Further, by providing the guard track, it is possible to eliminate crosstalk near the zone boundary. Furthermore, since a test track is provided, it can be used for adjusting the recording power.
Further, since the difference between the numbers of tracks of adjacent rotation groups is constant, the conversion from the logical address to the physical address can be performed by a simple operation, and it is not necessary to provide a table for the conversion.

Third Embodiment Hereinafter, a third embodiment will be described with reference to FIG. Example 3 is generally the same as Example 2, except for the following points.

In the format of the logical track of the second embodiment, the number of surplus sectors (not used for recording) that secure the specified logical track in each rotation group is not constant. Therefore, when calculating the physical position, there is a problem that it is necessary to store the surplus number of sectors in the table.

FIG. 8 shows a logical track structure for solving the problem in the second embodiment. Among the symbols at the top of each column, the same symbols as those in FIGS. 5 and 7 have the same meaning. DUM is the number of remaining sectors that secure the logical track in each zone, ΔD
UM is the number of remaining sectors D between the adjacent zones.
It is the difference in UM. RES is the sum of DUM and G + T.

In FIG. 8, the number of logical tracks LT / G is set to be different by a predetermined number, for example, 43, between adjacent rotation groups, and guard tracks and test tracks of three physical tracks are further secured, and the remaining sectors. Number DUM
However, a predetermined number, 6 in the illustrated example, is set to be different between adjacent rotation groups. In this way, when calculating the physical position, the difference in the number of the remaining sectors DUM is constant, so even if this difference is not stored in the table, it can be incorporated in the calculation formula as a constant. Good and easy to calculate.

Fourth Embodiment Hereinafter, a fourth embodiment will be described with reference to FIGS. 9 and 10. This embodiment is the same as the second embodiment except that the number of physical tracks per rotation group and the number of rotation groups of the entire disc are different.

The logical track format of the third embodiment solves the problems of the first and second embodiments, and since the number of remaining sectors after securing the logical track is a positive number, the logical track has a zone boundary. It does not straddle. Also,
When calculating the actual physical position from the logical address, it is possible to calculate by an integer operation regardless of the table. However, the remaining sectors exist as wasteful sectors in which data is not always recorded, and there is a problem that the disk capacity is not fully utilized. Figure 9
And FIG. 10 shows a logical track structure for solving the problem in the third embodiment. FIG. 9 shows 1024 bytes / sector, and FIG.
Is 512 bytes / sector. 9 and 10
In Fig. 9, the total number of sectors in each zone corresponds to an integer number of logical tracks, and the difference in the number of logical tracks between adjacent zones is constant (Fig. 9).
176 in the case of, and 54) in the case of FIG.

Although the guard track and the test track are not provided in the illustrated example, they can be secured similarly to the third embodiment.

Embodiment 5 Hereinafter, Embodiment 5 will be described with reference to FIGS. 11 and 12. In this embodiment, one sector consists of 1024 bytes. The structure of the disk is generally the same as that shown in FIGS. 1 to 3, but the header portion of each sector is different from that shown in FIG. That is, as shown in FIG. 11, it has two address parts 4a and 4b. Each of the address parts 4a and 4b has a track address part 6, a sector address part 5 and an ID part 21. Two address parts 4a
The same address is written in the track address portion 6 and the sector address portion 5 of 4 and 4b. This address represents the address of that sector. The same address is written twice in order to increase the reliability.
The ID part 21 is for identifying the addresses of the first address part 4a and the second address part 4b.
"0" is written in the ID part 21 of the address part 4a, and "1" is written in the ID part 21 of the address part 4b.

FIG. 12 shows the layout of logical tracks. In the figure, among the symbols at the top of each column, the same symbols as those in FIGS. 5, 7, and 8 have the same meaning. S / LT represents the number of sectors per logical track. The arrangement of the illustrated trucks is generally the same as that of FIG. 5, except for the following points. First, the number of zones is 30 instead of 31 as in FIG. Each zone has 752 physical tracks. Further, each logical track has 2 4 or 16 sectors.

As shown in FIG. 11, track address 6
Is composed of 16 bits and is used to indicate a value from 0 to 22560. The sector address 5 is composed of 4 bits and is used to indicate a value from 0 to 15.

As described above, in the above embodiment, since the track address is set to 16 bits, the track address can be easily calculated.

Sixth Embodiment Next, a sixth embodiment will be described with reference to FIGS. 13 and 14. Also in this embodiment, one sector consists of 1024 bytes. In this embodiment, as shown in FIG. 13, each of zones 0 to 29 is composed of 768 physical tracks 10, and 128 sectors constitute one logical track. The address is written in double. FIG. 14 shows the format of the header parts 4a and 4b in that case.
Track address 6 is composed of 16 bits and is used to represent a value from 0 to 23040. Sector address 5 is composed of 7 bits and is used to represent a value from 0 to 127. ID address 7 is "0"
Or take "1".

In such a logical track arrangement, the track address and sector address read from the disk remain unchanged, and the actual track address and sector address can be obtained by a simple integer operation corresponding to the linear logical address from the host device. It has the advantage that it can be calculated. Also,
Actual number of sectors for one rotation (number of sectors for one physical track)
The difference is that there is no need to consider it. In the example shown in FIGS. 11 and 14, the address is double written, but even if it is not twice, it may be recorded in multiples of 2 m (m is an integer) times. In this case, the ID indicates how many times the address is.

Embodiment 7 Next, with reference to FIG. 15 and FIG. 16, an operation when the above-mentioned optical disk is loaded into a drive device and a target sector is accessed will be described. FIG. 15 shows an optical disk drive device 31 and a host device 32 used for writing and reading the optical disk 2. Although the optical disc 2 is actually loaded into the optical disc drive 31, it is shown outside the optical disc drive 31 for convenience. The optical disk drive device 31 writes, from the host device 32, commands for writing and reading to and from the optical disk 2, and receives the commands together with the address to be read. This address is linear.

The operation of the drive device which receives such a command seeks the track to which the corresponding sector belongs based on the given address will be described below. The write and read operations themselves are well known and will not be described.

FIG. 16 shows the operation for seeking as described above. First, the drive device 31 reads the address of the logical track on the disk 2 at the current position of the header part (the position where the write / read head is actually facing) (102). Next, the number of the zone to which the logical track belongs is calculated from the read address of the logical track (104). Next, the physical position of the logical track from which the address is read is calculated (106). next,
The linear logical address from the host device 32 is converted into a logical track address (108). Next, the zone number of the target logical track address is calculated (110). Next, the physical position of the target sector is calculated (112). Next, in consideration of the zone number, the number of physical tracks between the current position and the target position is calculated (114). The seek operation is started using the calculated number of physical tracks (11
6). The above operation is repeated until the target track is reached (118).

When the target track is reached, the address of the header of each sector is read to search for the target sector.

Using the optical disk of the above-mentioned embodiment has the following advantages in the above seek operation. For example, when the optical disc is the optical disc of the first, second, and third embodiments, the conversion in step 108 can be performed by a simple calculation. That is, the logical track address At and the logical sector address As are obtained as the quotient and the remainder in the division. That is, A _L / (S / LT), where S / LT is the number of sectors per logical track, A
_L is a linear logical address from the host device. Therefore, a table for address conversion is not required, which simplifies software for device configuration or seek.

When the optical disk of the second embodiment is used, the calculation of the zone number (identification of the zone) in steps 104 and 110 can be performed using the following relational expression. That is, for a given At, 17 × (ZN + 1) × {LT / GZ _{N = 0} + (LT / GZ
_{N = 0-} ΔLT / G × ZN)} / 2> 17 × At +
The minimum ZN that satisfies (remaining number of sectors stored in the table) is the zone number to be obtained. Here, LT / GZ _{N = 0} is the number of logical tracks in zone # 0. Therefore, it is sufficient to store the number of remaining sectors, which is a relatively small value, in the table. Therefore, the software for configuring or seeking the device is simplified.

Furthermore, when the optical disc of the fourth embodiment is used, the calculation of the zone number (identification of the zone) in steps 104 and 110 can be performed using the following relational expression. That is, for a given At, 17 × (ZN + 1) × {LT / GZ _{N = 0} + (LT / GZ
_The minimum ZN satisfying _{N = 0-} ΔLT / G × ZN)} / 2> 17 × At is the zone number to be obtained. Therefore, it is not necessary to make corrections using the number of remaining sectors. Therefore, the software for the steps 104 and 110 or the seek is simplified.

Embodiment 8 Next, referring to FIG. 17 and FIG. 18, Embodiment 8 of the present invention
Will be explained. This embodiment is for adjusting the power of the laser beam used for writing before writing on the optical disk having the test track described in the second embodiment. Such a power adjusting function is provided in the optical disk drive device shown in FIG.
FIG. 17 shows an optical disk drive device 3 having such a function.
2 is a block diagram showing the function of 1. As shown in the figure, the optical disk drive device 31 includes a CPU, a ROM and an RA.
A control circuit 33 having M, a recording circuit 34, a laser control circuit 35, a write / read head 36 having a semiconductor laser built therein, a reproduction circuit 37, and a reproduction quality evaluation circuit 38 are provided. The control circuit 33 receives a command from the host device 32 and sends a control signal for performing power adjustment to each unit in the device 31. At this time, the initial value of the power of the laser used for writing is output. Recording circuit 34
Records test data based on a control signal from the control circuit 33. That is, data having a predetermined content is provided. The laser control circuit 35 modulates the data supplied from the recording circuit 34 and sends it to the write / read head.
At this time, the power of the semiconductor laser is set to the initial value output from the control circuit 33. The write / read head 36 records the given data with the set power. Then, the recorded data is read. Reproduction circuit 37
Demodulates the data read by the write / read head 36. The reproduction quality evaluation circuit 38 uses the reproduction circuit 37.
It is calculated how faithful the data from is to the data given from the recording circuit 34, ie, what is the error rate, and the reproduction quality is evaluated by this. Based on this evaluation result, the control circuit 33 changes the power setting value. This is repeated to find the optimum power value.

FIG. 18 shows a process of repeatedly obtaining the optimum power value by repeatedly changing the power setting value. First,
The power is set to the initial value (202) and writing is performed (204). Next, the written data is reproduced (20
6). Then, the quality is evaluated (208). If the quality is good, it ends. If not, it is judged whether the power is too large (210). If it is too large, the power setting value is lowered (212). Conversely, if it is too small, the power setting value is increased (214). Then, the process returns to step 204. The above operation is repeated until the reproduction quality becomes good.

Ninth Embodiment Next, an optical disc of a ninth embodiment will be described with reference to FIG. The structure of the disc of this embodiment is generally the same as that of the disc of the first embodiment. However, as described in detail below, it is different in that it can be set as a different type of recording area for each zone.

A logical track structure as shown in FIG. 19 is arranged. FIG. 19 shows the case of 1024 bytes / sector and 17 sectors / logical track. Among the symbols at the top of each column, the same symbols as those in FIGS. 5, 7, 8 and 12 have the same meaning. FLT is the address of the first logical track in each zone. LT indicates a track number of a data logical track, a spare track, or a parity track in each zone. TEST indicates the track number of the test track in each zone. PAR indicates the number of parity tracks in each zone. The parity track is used to record a parity symbol when the corresponding zone is set to O-ROM (fully embossed).

As shown in FIG. 19, the recording area is divided into 30 zones from 0 to 29 by zone numbers, and each zone consists of 748 physical tracks. The number of logical tracks in each zone is obtained by dividing the number of sectors in each zone by 17. The parity track is provided at a predetermined position in each zone, and the number of parity tracks is set to decrease from 144 to 86 in order by 2 as the zone number increases. As a result, when the parity track address of each zone is obtained, the number of parity tracks may be reduced by a predetermined number (2), which can be calculated by a simple integer calculation, and a table storing the addresses is not required. is there.

FIG. 20 is an explanatory diagram of a disk structure management table of Embodiment 9 of the present invention having 1024 bytes / sector. The disk structure management table is provided in the first sector of the defect management area (the head part of the user zone: the head part of the first zone).

In FIG. 20, the 0th byte to the 21st byte are information relating to the defect processing and are not directly related to the present invention, and therefore omitted here. The 22nd byte to the 51st byte specify the type of each zone from zone # 0 to zone # 29. Here, the types are three kinds of R / W, WO, and O-ROM, and each byte No. in the figure. In the row of "01", the corresponding zone is the R / W type, "02" indicates that the corresponding zone is the O-ROM type, and "03" is the corresponding zone is WO. Represent something. In the table of FIG. 20,
"/" Between "(01)", "(02)", and "(03)" means "or".

When the disc is the R / W type, all the 22nd to 51st bytes of the disc structure management table are set to "01", and when the disc is the WO type, all the 22nd to 51st bytes are set to "03". In the case of, it is set to "02" in the 22nd to 51st bytes. In addition, P-ROM (that is, R /
When the W type zone and the O-ROM type zone are mixed, the byte corresponding to the R / W type zone is "01", and the byte corresponding to the WO type zone is "02". .

The disk is of the (R / W + WO) type, that is,
When the R / W type zone and the WO type zone are mixed, the byte corresponding to the R / W type zone is set to “01”, and the byte corresponding to the WO type zone is set to “03”. Is set.

If the disk is of the (WO + O-ROM) type, that is, a mixture of W / O type zones and O-ROM type zones, the byte corresponding to the W / O type zone is "03". , The byte corresponding to the O-ROM type zone is set to "02".

The disk is (R / W + WO + O-ROM)
In the case of mixed types of R / W type zones, WO type zones and O-ROM type zones, the byte corresponding to the R / W type zones is "0".
1 ", the byte corresponding to the WO type zone is" 0 "
3 ", the byte corresponding to the O-ROM type zone is set to" 02 ".

The type of each zone can be set independently of other zones.

Thus, as a conventional optical disc,
R / W type, WO type, O-ROM type, R / W
Type- and O-ROM type parts are mixed P-
There were only four types of ROM type, but in this embodiment,
In addition to the above four types, a mixed type of R / W type part and WO type part, W / O type part and O-
Three types are possible, a type in which a ROM type portion is mixed, an R / W type portion, and a type in which a W / O type portion and an O-ROM type portion are mixed, and a total of 7 types.
You will get different types of discs.

Further, in the conventional P-ROM type, from the first zone to a certain zone of the disc is an R / W type, and from the next zone to the last zone is an O-RO.
There was only an M type zone, that is, the disk was divided in two in the radial direction, that is, by a circumferential boundary line centered on the center of the disk. On the other hand, in this embodiment, it is possible to freely set the type of each zone on one disk.

Embodiment 10 Hereinafter, Embodiment 10 will be described with reference to FIG.
As described above, the disk is rotationally driven at a constant angular velocity, and the frequency of the clock used for recording and reading is switched depending on the zone. R / W on disk
When types, WO types, and O-ROM types are mixed, the R / W type zone is arranged on the outermost peripheral side, the WO type zone is arranged next, and the O-ROM type zone is arranged on the innermost side. This is because in consideration of the higher data transfer rate on the outer peripheral side, the zone of the type that is accessed most frequently is arranged on the outer peripheral side. That is, since the R / W type is accessed most frequently among the three types in order to execute the three operations of read, write, and erase, it is arranged on the outermost peripheral side and W
Regarding the O type and the O-ROM type, the WO type is arranged on the outer peripheral side in consideration of the fact that the former has a write operation even though it is only once with respect to the latter.

Eleventh Embodiment Next, an eleventh embodiment will be described with reference to FIG.
In the same optical disc as the tenth embodiment, as shown in FIG. 21, when R / W type and WO type are mixed,
The R / W type zone is arranged on the outermost side and the WO type zone is arranged on the inner side. Considering that the data transfer rate is higher on the outer peripheral side, the zone of the type that is accessed most frequently is arranged on the outer peripheral side.

Twelfth Embodiment Next, a twelfth embodiment will be described with reference to FIG.
When the WO type and the O-ROM type are mixed in the optical disc similar to that of the tenth embodiment, the WO type zone is arranged outside and the O-ROM type zone is arranged inside. Considering that the data transfer rate is higher on the outer peripheral side, a zone of a type that is accessed more frequently is arranged on the outer peripheral side. That is, in the WO type and the O-ROM type, the WO type is arranged on the outer peripheral side in consideration of the fact that the former has a write operation although it is only once with respect to the latter.

Embodiment 13 Next, Embodiment 13 will be described with reference to FIG. This embodiment relates to a light driving device 31 having a function of changing the attribute of a zone as described below.
As shown in the figure, the host device 32 and the drive device 31 are connected by an interface such as SCSI. Further, the optical disk 2 is actually loaded in the optical disk drive device 31.

In the thirteenth embodiment, the entire surface of the optical disk is R.
/ W area. However, the area displayed as "empty" is initially inaccessible. The optical disc drive is provided with a function of executing the command A for rewriting the management table of the attributes of each zone, and when the command A is received from the host device, the attributes of the zone designated in the command are set, for example, as shown in FIG. Change to WO, and along with this, make the "empty" area accessible (B). When data is written in the area whose attribute is changed to WO, the written data cannot be rewritten because the attribute of the area is changed to the WO attribute. That is, this part becomes a ROM. On the other hand, the newly accessible R / W area can be written and read. Therefore, this makes it possible to obtain an optical disk having the same function as that of the P-ROM.

The attribute change as described above can be performed while the user is using the disc. Further, it is also possible to return to R / W after once changing to WO.

P- formed by embossing the ROM part
In order to produce a ROM disc, it is necessary to create a master disc, so if the number of copies is small,
The cost of one disk increases. On the other hand, if a disc is produced as in the above embodiment, the ROM is
A disk equivalent to a P-ROM disk having a portion formed by embossing can be obtained at low cost.

Example 14 Next, Example 14 will be described with reference to FIG.
This embodiment also relates to the light driving device 31 having a function of changing the zone attribute. In the embodiment shown in FIG. 24, the entire portion of the R / W area containing the data is WO.
It has been rewritten as an attribute. In FIG. 25, only the zone specified by the command C has the specified attribute (WO in the illustrated example).
Is rewritten as (D). For example, it can be applied when it is desired to prevent falsification of only the data written in a certain zone.

Fifteenth Embodiment Next, a fifteenth embodiment will be described with reference to FIG. This embodiment relates to an optical drive device 31 having a function of changing a zone attribute and executing a backup command. 26, the description of the same parts as those in FIG. 24 is omitted. The optical disc 2 is divided into a plurality of zones,
The attributes of each zone are managed by the management table 41. In FIG. 26, each zone has its attributes defined alternately between the R / W area and the WO area, and the WO area and the R / W area have almost the same total capacity.

A concrete control procedure for executing the backup command will be described with reference to FIG. FIG. 27
When a command is received from the host device at
2) The content of the command is judged (304), and if it is a capacity inquiry, the capacity of the R / W area is returned (30
6). If it is a read or write command (30
8) It is checked whether the write / read head is accessing the R / W area (310), and if it is the R / W area, the command is executed (312). If the command is a backup command (314), execution completion is immediately returned to the higher-level device 32 (316), and if there is no access while monitoring the access from the higher-level device 32, R at any time
The data in the / W area is copied to the WO area (320). At this time, if necessary, the attribute of the corresponding zone in the management table is rewritten to "R / W" prior to copying (31
8) After copying, restore the original (322). In FIG. 26,
It is shown that the rewriting F and H of the table and the copying G of the data are executed with respect to the backup command E. The total capacity of the WO area may be set larger than the total capacity of the R / W area.

Sixteenth Embodiment Next, a sixteenth embodiment will be described with reference to FIG.
This embodiment also relates to the light driving device 31 having a function of changing the zone attribute. 28, the description of the same parts as those in FIG. 26 is omitted. The optical disc 2 can be recorded on both sides. The optical disc drive 31 does not have to lay the discs on both sides of the optical disc 2.
It has a read / write function. Here, side A (front) is R /
It is the W region, and the B surface (back) is the WO region. By the same procedure as shown in FIG. 27, the backup command (I) temporarily changes the attribute of the B side to the R / W area (J), and copies the data of the A side to the B side (K), Then, the attribute of the B side is returned to WO (L). Since the data is copied to the WO area, the data is not destroyed by the optical disk device that does not have the function of changing the area attribute.

Embodiment 17 Next, Embodiment 17 will be described with reference to FIGS. 29 and 30. This embodiment also relates to the light driving device 31 having a function of changing the zone attribute. FIG. 29
26, the description of the same parts as those in FIGS. 26 and 28 will be omitted. As shown in FIG. 30, when the optical disk drive receives a restore command M from the upper device 32 (402)
Immediately, completion is returned to the host device (404), and the data in the WO area is copied to the R / W area (406).

[0081]

According to the optical disk of claim 1, each logic
A track is composed of 2 n sectors, and
Kuta's address is a serial number using binary numbers
Makes it easier to calculate the target sector.
It In addition, a predetermined number of bits from the beginning of the address
Is used as the logical track address.
It becomes easy to identify the physical track. In addition, the end of the address
Instead, keep a predetermined number of bits in the logical track.
The position of the sector
It becomes easy to identify the sector to be used. Optical disk drive according to claim 2
According to the operating device,
Logical sector containing the sector based on a defined number of bits
Since the rack address is specified, the target logical traffic
It is possible to easily specify the lock. The light of claim 3
According to the disk drive, the end of the address of each sector
Within a logical track based on a predetermined number of bits from
Since the position of the sector in
It is possible to easily identify the target. The light of claim 4
According to the disk drive, the start of the address of each sector
The sector is included based on a predetermined number of bits from
Since the address of the logical track to be
It is possible to easily specify the logical track to be recorded. Well
In addition, a predetermined number of
Position of the sector in the logical track based on
The target sector can be specified easily.
I can.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing the structure of an optical disc according to the present invention.

FIG. 2 is a schematic plan view showing the structure of an optical disc according to the present invention.

FIG. 3 is a perspective view showing a guide groove and a land portion partially in section.

FIG. 4 is a structural diagram of a track near a zone boundary of an optical disc according to the present invention.

FIG. 5 is an explanatory diagram showing a disc format according to the first embodiment of the present invention.

FIG. 6 is a schematic partial plan view showing the arrangement of guard tracks and test tracks in Embodiment 2 of the present invention.

FIG. 7 is an explanatory diagram showing a format of a disc according to the second embodiment of the present invention.

FIG. 8 is an explanatory diagram showing a disk format according to the third embodiment of the present invention.

FIG. 9 is an explanatory diagram showing an example of a disc format according to a fourth embodiment of the present invention.

FIG. 10 is an explanatory diagram showing another example of the format of the disc according to the fourth embodiment of the present invention.

FIG. 11 is an explanatory diagram showing a format of a header part according to the fifth embodiment of the present invention.

FIG. 12 is an explanatory diagram showing a format example of a disc according to a fifth embodiment of the present invention.

FIG. 13 is an explanatory diagram showing a format according to a sixth embodiment of the present invention.

FIG. 14 is an explanatory diagram showing a format of a header part according to the sixth embodiment of the present invention.

FIG. 15 is a schematic diagram showing an optical disk drive device and a host device 32 used for writing and reading an optical disk.

FIG. 16 is a flowchart showing the operation of the drive device when accessing the target sector of the optical disc.

FIG. 17 is a block diagram showing an optical disk drive device having a function of adjusting power.

FIG. 18 is a flowchart showing an operation for power adjustment.

FIG. 19 is an explanatory diagram showing the format of a disc according to the ninth embodiment of the present invention.

FIG. 20 is an explanatory diagram of a disk structure management according to the ninth embodiment.

FIG. 21 is a diagram showing an arrangement of recording areas of each type in the optical disc according to Example 10.

FIG. 22 is a diagram showing an arrangement of recording areas of each type in the optical disc according to Example 11.

FIG. 23 is a diagram showing the arrangement of recording areas of each type in the optical disc according to Example 12.

FIG. 24 is a structural diagram of an optical disc and an optical disc drive device according to a thirteenth embodiment.

FIG. 25 is a structural diagram of an optical disc and an optical disc drive device according to a fourteenth embodiment.

FIG. 26 is a structural diagram of an optical disc and an optical disc drive device according to a fifteenth embodiment.

FIG. 27 is a flowchart of the process according to the fifteenth embodiment.

FIG. 28 is a structural diagram of an optical disc and an optical disc drive device according to a sixteenth embodiment.

FIG. 29 is a structural diagram of an optical disc and an optical disc driving device according to a seventeenth embodiment.

FIG. 30 is a flowchart of the process according to the seventeenth embodiment.

[Explanation of symbols]

1 guide groove, 2 optical disk, 3 light spot,
4, 4a, 4b header part, 5 sector address part,
6 track address parts, 7 data parts, 8 sectors, 9 physical tracks, 10 zones, 11 tracks, 12 land parts, 13 zone boundaries, 14,
15 guard tracks, 16 test tracks, 2
1 ID address, 31 Optical disk drive, 3
2 host device, 41 management table.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiko Nakane 1 Baba Institute, Nagaokakyo City, Kyoto Prefecture Mitsubishi Electric Corporation Video System Development Laboratory (72) Teruo Furukawa 1 Baba Institute, Nagaoka Kyoto Prefecture Mitsubishi Electric Systems Co., Ltd. Video Systems Development Laboratory (72) Inventor Junichi Kondo 8-1-1 Tsukaguchi Honcho, Amagasaki City, Hyogo Prefecture Mitsubishi Electric Corporation Itami Works (72) Inventor Masafumi Ototake 8 Tsukaguchi Honcho, Amagasaki City, Hyogo Prefecture 1-1-1, MITSUBISHI ELECTRIC CO., LTD. Material Devices Research Laboratory (56) Reference JP-A-2-141973 (JP, A) JP-A-62-20141 (JP, A) JP-A-2-278417 (JP, A) JP-A-50-68034 (JP, A) JP-A-6-223503 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 7/007 G11B 20/12

Claims (4)

(57) [Claims] 1. A single rotation is provided in each recording area.
Minute physical truckWhen, It is provided on the physical track, and the address is recorded on each.
Has a sector containing the recorded header area, A certain number of sectorsByLogical trackConfigure Recorded in the header area of each sectorthe aboveSpecify address
Each sector to one of the above logical tracks.
You can identify which it belongs to, A predetermined number of bits from the beginning of each sector address
Represents the address of the logical track containing the sector.
Then A predetermined number of bits from the end of each sector address
Represents the position of the sector in the logical track, Each logical track is composed of 2 n (n is an integer) sectors.
The above address used binary numbers.
An optical disc characterized by a serial number. 2. A light for driving the optical disk according to claim 1.
A disk drive, where the start of the address of each sector
The sector is included based on a predetermined number of bits from
Optical having means for identifying the address of the logical track
Disk drive. 3. A light for driving the optical disc according to claim 1.
A disk drive that ends the address of each sector
Within a logical track based on a predetermined number of bits from
Optical disc having means for locating the sector in
Disk drive. 4. A light for driving the optical disk according to claim 1.
A disk drive, A predetermined number of bits from the beginning of each sector address
Address of the logical track containing the sector based on
Means for identifying A predetermined number of bits from the end of each sector address
The position of the sector in the logical track based on
And an optical disk drive having a setting means.