JPH05159472A - System for recording and controlling data of draw type optical disk - Google Patents

Abstract

PURPOSE:To provide a data recording and controlling system with the high recording and reproducing efficiency of data and with the high utilizing efficiency of an optical disk together. CONSTITUTION:A DRAW type optical disk is used whose recording area 1 is divided into plural zones 4, 5, 6 and 7 in the direction of a radius and whose periphery direction of respective zones are divided into plural sectors S0-S10. Alternating sectors S7, S8, S9 and S10 of one sector at every tracks t0-tn contained in respective zones are provided. Further, the data is recorded by providing the alternating sector in the adjacent zone of the zone containing the sector while executing the recording and processing of the data when right data can not recorded in one or more sectors.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording management system for a write-once optical disc in which data cannot be rewritten,
In particular, it relates to the setting of a replacement sector when a defect occurs in the sector in which data is to be recorded.

[0002]

2. Description of the Related Art Generally, a write-once type optical disc is formed by laminating a thin film of nanometer order in a single layer or a multi-layer on a surface of a substrate on which a fine preformat pattern of micron order or submicron order is formed. Therefore, it is extremely difficult to form the entire recording area without any defects, and it is more common to include some defects. In addition, in this type of optical disc, generally, the circumferential direction of a spiral or concentric track is divided into a plurality of sectors, and data is recorded and reproduced in sector units.

The conventionally known constant angular velocity (CA
In an optical disc of the V (Constant Angular Velocity) system, 2-3 sectors are provided in advance for each track, and about 100 tracks are provided in the outermost recording area in advance, so that correct data can be recorded. When a sector that cannot be recorded (error sector) occurs, the data is first recorded in the replacement sector in sequence, and when the replacement sector cannot process all the data, the data is recorded in the sector of the replacement track. Has been done.

In order to increase the recording density in the outer peripheral recording area as compared with the CAV type optical disk, the recording area is divided into a plurality of zones in the radial direction, and the sectors are divided so that the peripheral direction of each zone reaches the outer peripheral zone. The number of MCAV (Modified CA) is divided so that the recording density of each sector in each zone becomes almost constant.
A V) type optical disk has been conventionally proposed. This MCAV type optical disc also employs the same data recording management system as the CAV type optical disc.

[0005]

In order to record the data of the error sector on the alternate track and to reproduce the data of the error sector recorded on the alternate track, the optical head is used for recording and reproducing and the outermost circumference. Since it is necessary to reciprocate with the alternate track set in the recording area, the seek time becomes long, and it takes a long time to record and reproduce the data. Therefore, it is preferable that the number of replacement processes using the replacement tracks is as small as possible, but in order to realize this, it is necessary to increase the number of replacement sectors provided for each track. For this reason, in the conventional optical disc, about 2-3 sectors are provided for each track. However, since the replacement sector is an area in which additional data cannot be written unless an error sector occurs, increasing the number of replacement sectors reduces the effective recording capacity of the optical disc. In particular, in the MCAV type optical disc, the number of sectors per track is larger than that in the CAV type optical disc, and the number of required replacement sectors is also increased, so that the recording capacity is further wasted.

The present invention solves the inconvenience that the effective recording capacity of an optical disk is reduced when the recording / reproducing time is shortened, and provides a data recording management system having both high data recording / reproducing efficiency and high optical disk utilization efficiency. With the goal.

[0007]

In order to achieve the above-mentioned object, the present invention is a write-once type in which a recording area is divided into a plurality of zones in the radial direction, and the circumferential direction of each zone is divided into a plurality of sectors. When data is recorded on the optical disk in sector units and correct data cannot be recorded in the sector in which the data is to be recorded, in the data recording management method of re-recording the data in another sector, 1 included in each zone If one sector is provided as a replacement sector for each track and the number of error sectors is one or more,
Data is recorded by providing a replacement sector in a zone adjacent to the zone including the sector in which the data recording process is being executed.

As the write-once type optical disc, an arbitrary optical disc whose recording area is divided into a plurality of zones in the radial direction can be used, but an MCAV type optical disc is particularly suitable because of its high recording capacity. .

[0009]

When the above-mentioned means is adopted, 1 is set for each track.
Since only the replacement sectors for each sector are set, the recording capacity is not wasted and the effective recording capacity can be increased as compared with the conventional optical disc in which the replacement sectors are set for each track by 2 to 3 sectors. Also, if the replacement sector is set in the adjacent zone, the seek amount of the optical head can be set to the width of one zone at the maximum. Therefore, when the optical head seeks the replacement track set in the outermost peripheral area as in the conventional case. Compared with, the seek amount of the optical head can be reduced, and the time required for recording and reproduction can be shortened.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an explanatory diagram schematically showing a data recording management system, FIG. 2 is an explanatory diagram showing an example of zone division of an optical disc used in this example, and FIG. 3 is a flowchart showing a recording processing operation.

As shown in FIG. 2, in the optical disc used in this embodiment, a disc management information recording region 2 is assigned to the innermost peripheral portion of a ring-shaped recording region 1, and the outer peripheral region thereof is a user recording region 3 It has become. User recording area 3
Are divided into four zones 4, 5, 6, 7 in the radial direction, and each zone 4, 5, 6, 7 is divided into a plurality of sectors s _{0 to} s ₁₀ . The number of sector divisions in each zone is larger in the outer zone, and the linear recording densities of the sectors are adjusted to be substantially equal. Then, the final sectors s ₇ , s ₈ , in each zone 4, 5, 6, 7
s ₉ and s ₁₀ are assigned as replacement sectors, and their addresses and the like are recorded in the disc management information recording area 2.

As shown in FIG. 1, each zone 4, 5, 6, 7 is composed of four tracks. Reference numerals t _{0 to} t _n in the drawing indicate track numbers, and s _{0 to} s ₁₀ indicate sector numbers. The data recording management method according to the present invention will be described below with reference to this drawing. Data recording is started from the sector s ₀ of the track t ₀ , and in principle, the track number and the sector number are recorded in ascending order. It Track at the stage where data is recorded from the sector s ₀ of the track t ₀ to sector s _6, if the error sector does not occur, jump over the replacement sector s ₇ tracks t _0, the sector s ₀ tracks t ₁ Data recording is performed for t ₁ . At the stage where data is recorded from the sector s ₀ tracks t ₁ to sector s _6, 1 single error if the sector occurs, alternate sector s ₇ tracks t ₁
The data is recorded in. Also, at the stage where data is recorded from sector s ₀ to sector s _{6 of} track t ₁ ,
When two or more error sectors occur, the data of the first error sector is recorded in the replacement sector s ₇ of the track t ₁ , and the data of the other error sectors of the first track t ₄ constituting the zone 5. It is recorded in order from the sector s ₀ . In the example of FIG. 1, the data of the error sector of the track t ₁ is recorded in the sectors s ₀ and s ₁ of the track t ₄ . When the data recording on the zone 4 is completed, the data recording on the zone 5 is started from the track t ₅ of the zone 5.

Next, the processing operation of the present invention will be described with reference to the flowcharts of FIGS. 3 and 4. When the data recording process on the optical disc is started, first, in step S-1, the address of the sector in which data is to be recorded is set. In the example of FIG. 2, sector s of track t ₅ has already been
Because the data from ₀ to sector s ₄ are recorded, the sector s ₅ tracks t ₅ is set. Next, in step S-2, a data recording (writing) process is performed on this sector s ₅ . In step S-3, the read (read) process of the recorded data is performed, and the write-processed data and the read-processed data are compared in step S-4. Normally, error correction data by ECC (Error Corected Code) is added at the time of data recording, and an error in the data at the time of reading can be corrected. In step S-4, this E
The error correction level by CC is set low and rigorous checking is performed to prevent data errors due to deterioration of the medium due to aging. If no data error is detected in step S-4, it means that correct data has been recorded in the desired sector, and the process is terminated.

When a data error is detected in step S-4, it is checked in step S-5 whether or not the replacement sector of the track including the sector for which the write processing has been executed is in the unwritten state. If it is determined in step S-5 that the replacement sector has not been written, the write processing for the replacement sector is performed in step S-7, and the read processing of the write-processed data is performed in step S-8. Then, it is determined in step S-9 whether or not there is a data error. If it is determined in step S-9 that there is no data error, it means that the data in the error sector has been correctly recorded in the replacement sector. Therefore, in step S-11, the disk management information recording area 2 is replaced. The address of the processed sector and the address of the replacement sector are recorded, and the process ends. The data reproducing process can be performed by reading the address of the sector subjected to the replacement process and the address of the sector of the replacement destination from the disc management information recorded in the disc management information recording area 2. If it is determined in step S-9 that there is a data error, write failure is displayed in step S-10, and the process ends.
The user can look at this display and repeat the operation from step S-1 again to attempt data recording for the next sector. If it is determined in step S-5 that the replacement sector has been written, step S-
In step 6, the address of the replacement track, that is, the head track of the zone adjacent to the zone in which the write process is being executed is set, and the processes from step S-7 are performed.

In the above embodiment, the replacement track is set as the leading track of the zone adjacent to the zone including the track on which the write processing is being executed, but another track in the adjacent zone is set as the replacement track. You can also

[0016]

As described above, according to the present invention,
Since only one replacement sector is set for each track, the recording capacity is not wasted and the effective recording capacity is increased as compared with the conventional optical disk in which two or three replacement sectors are set for each track. be able to. Further, since the replacement sectors are set in the adjacent zones, the seek amount of the optical head can be set to the maximum width of one zone, and the optical head seeks the replacement track set in the outermost peripheral area as in the conventional case. Since the seek amount of the optical head can be reduced as compared with, the time required for recording and reproducing can be shortened.

[Brief description of drawings]

FIG. 1 is an explanatory diagram schematically showing a data recording management system of the present invention.

FIG. 2 is an explanatory diagram showing an example of zone division of an optical disc applied to the present invention.

FIG. 3 is a flowchart showing a recording processing operation in the present invention.

[Explanation of symbols]

1 recording area 2 disc management information recording area 3 user recording area 4, 5, 6, 7 zone s _{0 to} s ₁₀ sector s ₇ , s ₈ , s ₉ , s ₁₀ replacement sector t _{0 to} tn track

Claims (2)

[Claims] 1. An attempt is made to record data in sector units on a write-once type optical disc in which a recording area is radially divided into a plurality of zones, and the circumferential direction of each zone is divided into a plurality of sectors. When correct data cannot be recorded in a sector, in a data recording management system in which the data is re-recorded in another sector, one sector is provided for each track included in each zone, and correct data is recorded. If the number of sectors that cannot be recorded is one or more, the data of the write-once optical disc is characterized in that a replacement sector is provided in a zone adjacent to the zone including the sector in which the data recording process is being performed, and the data is recorded. Record management method. 2. The write-once optical disc according to claim 1, wherein the recording area is divided into a plurality of zones in a radial direction, and the number of sector divisions increases as the circumferential direction of each zone reaches an outer peripheral zone, and A data recording management system for a write-once optical disc, which is divided so that the linear recording density of each sector in each zone is substantially constant.