JPH02187966A - Sector recording system for direct-read-after-write type optical disk medium - Google Patents

Abstract

PURPOSE:To prevent double write, and also, to eliminate the need of seeking a write head to a management track one by one by providing a flag area for recording a sector state to a sector being a read/write unit of data, in a direct- read-after-write (DRAW) type optical disk medium used for an optical disk device. CONSTITUTION:Plural pieces of sectors S1, S2... are provided on a DRAW type optical disk medium, and in each sector thereof, a header part in which an ID for showing an address of the sector itself is recorded in advance, a data part which is positioned between them and records read/write which becomes an object of a data transfer, and a flag area are constituted. When it is used, first of all, when write is executed to the sector S1, data written information is recorded in a flag area F1, and with respect to the sector S2, as well, when data write is executed, written information is recorded in a flag F2. Accordingly, at the time of executing write to the sectors S1, S2..., it will suffice that information of the flags F1, F2... on the sector is read.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a write-once optical disk medium used in an optical disk device in an information processing apparatus, and particularly to a sector recording format of a write-once optical disk medium.

[Prior Art] Conventionally, a sector of this type of write-once optical disk medium has a header section in which an ID indicating the address of the sector itself is recorded in advance, and read/write data to be transferred between the host device and the host device. It consists of a data section to be recorded.

Each sector is identified by a header section, and only read/write data is recorded in the data section.When reading or writing data, the read/write head moves to the management track where sector information is recorded. It became necessary to seek each time.

[Problems to be Solved] Generally, when reading or writing data on write-once optical discs that use the conventional sector recording format described above, it is necessary to seek each time to read or write to the management track where sector information is recorded. However, there is a disadvantage in that the operating time of the device is lost.

The present invention has been made in view of the above-mentioned problems, and aims to provide a sector recording method for a write-once optical disk medium that enables sector management without seeking to a management track each time data is read or written.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a write-once optical disc medium used in an optical disc device, in which a header section in which an ID indicating the address of the sector itself is recorded in advance, and a host device. Information indicating whether or not data has been written to the data section is recorded in a sector, which is a data read/write unit, and includes a data section that records read/write data that is a target of data transfer between the two, thereby enabling sector management. This configuration includes a flag area.

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

FIG. 1 is a block diagram of one embodiment of the present invention.

On the write-once optical disc medium, there are a plurality of sectors St and S.
2. ... exists, and each sector 31°S2.・Fist・Ha,
The sector consists of a header section in which an ID indicating the address of the sector itself is recorded in advance, a data section in which read/write data to be transferred to a host device is recorded, and a flag area.

That is, the sector S1 consists of a header part H1, a data part Di, and a flag area F1, and the sector S2 consists of a header part H2, a data part D2, and a flag area F2.

Each flag area Fl, F2. ... is sector 51.32.
- Information indicating the state of the fist, that is, whether data has been written or not, is recorded.

Next, the operation of this embodiment will be explained.

First, when data is written to sector S1, information that data has been written is recorded in flag area F1.

Also, data for sector S2.

When writing is performed, the written information appearing in the flag area F2 is recorded.

Therefore sectors Sl, S2 . When writing to..., the flag area Fl on the sector.

F2. By reading the information, the state of the sector can be grasped without seeking to the management track one by one, and double writing to sectors in which data has already been written can be prevented.

[Effects of the Invention] As explained above, the present invention provides a write-once optical disc medium used in an optical disc device, in which a sector is a sector that is a unit of data reading, and which enables sector management for each sector. A flag area is provided to record the status, so when reading or writing to a write-once optical disk medium, double writing can be prevented by recording read/write information in the flag area within the sector, and the management track is This has the advantage that sector management can be performed without having to seek the read/write head.

Furthermore, since the number of times the read/write head seeks to the management track can be reduced, there is also the effect that the seek time can be reduced.

[Brief explanation of the drawing]

Figure aS1 is a block diagram showing an embodiment of the present invention. Sl, S2: Sector Hl, ) 12: Header section Di, D2: Data section Fl, F2: Flag area Agent: Patent Attorney Kihei Watanabe

Claims (1)

[Claims] In a write-once optical disc medium used in an optical disc device, read/write data to be transferred between a header section in which an ID indicating the address of the sector itself is recorded in advance and a host device. A postscript characterized in that a sector, which is a unit of data read/write and has a data section to be recorded, is provided with a flag area that records information indicating whether or not data is written to the data section and enables sector management. A sector recording method for type optical disk media.