JPH02239472A - Optical disk device - Google Patents

Abstract

PURPOSE:To shorten the time for writing a data and to promote the reliability by writing the same data in an alternate track adjacent to a track in which a data error is generated at the time of writing. CONSTITUTION:A track 12 for writing a data and an alternate track 14 for this track are alternately disposed on an optical disk medium 11(3), and when a data error is generated at the time of writing, the same data as this is written in an alternate track 14 for the track 12 concerned. That is, when the data error is generated during the data writing, the same data is written in an alternate sector 13 of the adjacent alternate track by an optical disk read/write part 4, and this operation is controlled by an optical disk formatter 5. By this method, the moving distance of a recording position is shortened, thus shortening the data writing time and promoting the reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical disc device using an optical disc medium on which data can be written, and particularly to an optical disc device that writes data to an alternative track when a data writing error occurs.

[Prior Art] In write-once optical disc devices that write data by changing the optical disc medium by laser irradiation, countermeasures against various data errors are taken in order to improve the writing quality. One of these methods is to write data to an alternative sector when a data error occurs during data writing.

That is, as shown in FIG. 3, the optical disc medium 11 includes:
Among, for example, 68 sectors constituting the data track 12, the last four sectors are provided as alternative sectors 13. Therefore, when a data error occurs in one track, the desired writing quality can be ensured by writing the same data in an alternative sector of the same track, provided the data error is within four sectors. If a data error of more than four sectors occurs in one track, the same data is written to a substitute track 14 provided at the outermost or innermost circumference of the optical disc medium 11.

[Problems to be Solved by the Invention] In the conventional write-once optical disc device described above, when a data error occurs and writing to an alternative track becomes necessary, the outermost or innermost track from the track currently being written is Light beam spots etc. must be moved to alternative tracks provided around the circumference. For this reason, there are problems in that it takes time to write data and the reliability of the device is reduced due to the long moving distance.

The present invention has been made in view of these problems, and it is an object of the present invention to provide an optical disc device that can shorten data writing time and improve reliability.

[Means for Solving the Problems] An optical disc device according to the present invention is an optical disc device comprising an optical disc medium on which data can be written and a data writing means for writing data to the optical disc medium. The optical disk medium has a track format in which tracks for data writing and alternate tracks for the tracks are arranged alternately, and the data writing means is configured to prevent data errors from occurring when writing data to the tracks for data writing. When this happens, the same data is written to an alternative track of the track adjacent to the track.

[Operations] According to the present invention, when a data error occurs in a write track, the same data is written in a replacement track of the track adjacent to the write track, so that the moving distance of the recording position is extremely short.

Therefore, data writing time can be shortened and reliability can be improved.

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

FIG. 2 is a block diagram showing the configuration of an information management system using an optical disk device according to an embodiment of the present invention.

This system consists of a host system 1 and an optical disk device 2.
It is configured by connecting. The optical disk device 2 includes a write-once optical disk medium 3 that uses thermal displacement by a laser beam, for example, an optical disk read/write section 4 comprising a laser HWt and an optical system for reading and writing from and to the optical disk medium 3, and the host. The optical disk formatter 5 manages track formation on the optical disk medium 3 via the optical disk read/write section 4 based on commands given from the system 1.

FIG. 1 is a diagram showing the track format of the optical disc medium 3. As shown in FIG. The optical disk medium 3 has n tracks TI, T2, . . . for reading data every other track. Tn are arranged, and these tracks TI, T2,...+
These tracks TI.
Alternative track T1p for T2,...+Tn. T2
p. ...+Tnp is arranged. Furthermore, these tracks T1 to Tn and alternative tracks T1p to Tnp are
m sectors S I L S 1 2* ”・*
S 1 m-s n L Sn 2 + ”'+ S
n m and Silp,SL2p,-...Slmp"Sn
1p+ Sn2p. −． It consists of Snmp.

In the optical disc device configured as described above, the optical disc read/write section 4 normally reads and writes data only to the tracks T1 to Tn based on commands and data from the host system 1. For example, if a data error occurs while writing data to the sector Sij of the track Ti, the optical disc read/write unit 4 writes an alternative track T1 adjacent to the sector Sij.
The same data is written to the alternative sector Sijp of p. The optical disc formatter 5 controls this operation.

Therefore, according to the system of this embodiment, when a data error occurs, the migration distance to an alternative sector can be minimized, and the writing speed and migration reliability can be improved.

In the above embodiments, a write-once type optical disk was used as an enemy, but it goes without saying that the invention can also be applied to, for example, a rewritable magneto-optical disk device.

[Effects of the Invention] As explained above, in the present invention, when a data error occurs when writing data to an optical disk medium, the data is written to an adjacent track, so that the writing time can be shortened and , the reliability of the optical disc device can be improved.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the track format of an optical disk medium used in an optical disk device according to an embodiment of the present invention, and FIG.
The figure is a block diagram of a system using the same optical disk device, and FIG. 3 is a schematic diagram showing the track format of a conventional optical disk medium. 1: host system, 2; optical disk device, 3, 11;
Optical disc medium, 4; Optical disc read/write section, 5
;Optical disc formatter, Engineering 2;Data track, T
1 to T n m } Rack, 14, Tip to T n
p+ alternative track, S11 to Snm: sector, 13
,SLl! ) to Snmp; alternative sector

Claims (1)

[Claims] (1) In an optical disc device comprising an optical disc medium on which data can be written and a data writing means for writing data to the optical disc medium, the optical disc medium includes a track for data writing and an alternative track for the track. and are arranged alternately, and when a data error occurs when writing data to a track for data writing, the data writing means writes the same to an alternative track of the track adjacent to the track. An optical disc device characterized in that it writes data.