JPH0359820A - Direct-read-after-write type optical disk medium - Google Patents

Abstract

PURPOSE:To enable management of sectors on a track without seeking to a management track by providing the same number of flag areas as the number of sectors in a track to record the state of each sector on the track which contains plural number of sectors as the units of reading and writing. CONSTITUTION:When data is written in a sector S0, completion of writing is recorded in a flag area F0 corresponding to the sector S0 in a sector S68. When data is written in a sector S1, completion of writing is recorded in the corresponding flag area F1 in the sector S68. This process is repeated to when data is written in a sector S67, completion of writing is recorded in the corresponding flag area F67 in the sector S68. By this method, on writing in sectors S0, S1,..., S67, overwriting in sectors in which information is already written can be prevented by reading out the information from corresponding flag areas F0, F1,..., F67 in the sector S68. Thus, management of sectors on a track can be performed without seeking to a management track.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a write-once optical disc medium used in an optical disc device in an information processing device.

[Conventional technology]

Conventionally, this type of write-once disk media has a track with multiple sectors consisting of a header section and a data section.
Read and write data is only recorded in the data section of the sector identified by the header section.

[Problems to be Solved by the Invention] The conventional write-once optical disc described above has a drawback in that when reading or writing data, it is necessary to seek to a management track in which the state of the sector is recorded.

An object of the present invention is to provide a write-once optical disc medium that allows sectors on a track to be managed without seeking to a management track.

[Means to solve the problem]

In the write-once optical disk medium of the present invention, for a track in which a plurality of sectors, which are data read/write units, exist, a management sector is provided that has a flag area for recording the status of each sector on the track for the number of sectors. There is.

[Operation] Therefore, in order to prevent double writing, sectors on a track can be managed without seeking to the management track.

[Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing the track format of a write-once optical disc medium according to an embodiment of the present invention.

69 sectors 3 on a track of a write-once optical disc medium
0. Sl,..., S67, S68 exist, and each sector SO, St,..., S67, S68 has a header section in which IO indicating the address of the sector itself is recorded in advance (for sector Sl, old, H68 for the sector 368) and a data section (Dl for the sector S1 and D68 for the sector 368) in which read/write data to be transferred with the host device is recorded. However, the data part 068 of the final sector 368 is 6
There are eight flag areas FO, Fl, ..., F67, and each flag area FO, Fl, ..., F67 is located in sector 30 . Information indicating the state of each sector is recorded corresponding to St, . . . , S67.

Sector 36 when writing is performed to sector SO
Written information is recorded in the corresponding flag area FO of sector B, and when writing is performed to sector Sl, written information is recorded in the corresponding flag area Fl of sector S68, and in the same way, information is written to sector S67. When writing is performed on the data, written information is recorded in the corresponding flag area F67 of the sector S68. Therefore, sectors SO, Sl.

..., when writing to S67, sector 3
By reading the information in the flag areas FO, Fl, .

[Effect of the Invention J As explained above, the present invention provides a management sector, and when reading and writing to a write-once optical disk medium, by recording read/write information in the corresponding flag area in the management sector, This has the effect of making it possible to manage sectors on a track without seeking to the management track when preventing double writing.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the track format of a write-once disk medium according to an embodiment of the present invention. SO, Sl, ..., S67, S68...
- Sector old. 168 D.I. 68 Header section data section FO. Fl.

Claims (1)

[Claims] 1. In a write-once optical disk medium, for a track where there are multiple sectors, which are units of reading and writing data,
A write-once optical disc characterized in that a management sector is provided with a flag area for recording the status of each sector on a track for the number of sectors.