JPS6374173A - Optical disk controller - Google Patents

Abstract

PURPOSE:To minimize the processing time of a disabled track by writing the contents of a data track to a spare track in case a write unable track is detected in a data write mode of an optical disk device and thereafter reading and writing the spare track. CONSTITUTION:An optical disk controller reads previously the specific used spare tracks of an optical disk device 6 and also a specific write unable data tracks corresponding to those used spare tracks and stores these read results in a memory 5. In case the writing is impossible with a certain sector in a write processing execution mode, the preceding contents of the track including said sector are read out to an optical disk control circuit 4 from the device 6. Then the data on said contents are written to an unused spare track and the data set under a write mode thereafter are written to a spare track via a DMA control circuit 2. The correspondence between a write unable track and a spare track is added to the memory 5. In a read mode the corresponding spare track is indicated to the device 6 against the write unable track.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an optical disc control device, and particularly to an optical disc control device.

The present invention relates to an optical disc control device that handles optical disc media in which unwritable tracks may occur.

2. Description of the Related Art In conventional optical disc control devices, when a write-incapable track is detected, various processes are performed by software in order to transfer control to software.

Problems to be Solved by the Invention As described above, the conventional optical disc control device has the disadvantage that the software load becomes heavy and the system performance deteriorates.

The present invention has been made in view of the above-mentioned conventional situation,
Accordingly, an object of the present invention is to provide a novel optical disc device that makes it possible to eliminate the above-mentioned drawbacks inherent in the conventional technology.

Means for Solving the Problems In order to achieve the above object, an optical disc control device according to the present invention is configured to include a memory and an optical disc control circuit, and in the above configuration, when writing data to the optical disc device, media defects etc. When a writable track is detected by Characterized by reading and writing.

Embodiment Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

FIG. 8 is a block diagram showing an embodiment of an optical disc control device according to the present invention, and FIG. 2 is a diagram showing a format of an optical disc medium used in an embodiment of the present invention.

In FIG. 2, one normal data is written to a data track. However, if there is a defect in the medium and it becomes impossible to write to a certain sector, the contents of the track containing that sector are transferred to a spare trunk, and from then on, the contents are read out of time on the spare track.

Next, referring to FIG. 1, one embodiment of the present invention is a direct memory access (hereinafter abbreviated as DMA) control circuit that controls data transmission and reception with a common data transfer path 1 (hereinafter abbreviated as bus). 2, an optical disc control circuit 4 that controls an optical disc device 6, a memory 5, and a firmware control circuit 3 that controls the DMA control circuit 2, the optical disc control circuit 4, and the memory 5.

The optical disc control device reads in advance which of the spare tracks of the optical disc device 6 is used and which unwritable data track the used spare track corresponds to, and stores it in the memory 5.

When a certain sector cannot be written during execution of a write process, the previous contents of the track including that sector are read from the optical disk device 6 to the optical disk control circuit 4.

Write that data to the unused spares 1 to 2, and then write the data that was being written to the bus and DMA control circuit 2.
M into the spare truck via. Then, the correspondence between the unwritable data track and the spare track is added to the memory 5. At the time of read processing, it is first checked by searching the memory 5 whether a write-inhibited track is being accessed, and if it is a write-inhibited track, the corresponding spare track is directly read by instructing the optical disk device 6.

DETAILED DESCRIPTION OF THE INVENTION As described in detail, the optical disc control device of the present invention provides the advantage of being able to perform read/write processing for an optical disc device including non-writable tracks in a minimum processing time without the intervention of software.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of an optical disc control device according to the present invention, and FIG. 2 is a diagram showing a format of an optical disc medium used in an embodiment of the present invention. 100. Common data transfer path (bus)-2,. Direct memory access (DMA) control circuit, 30. . firmware control circuit, 4. , , Optical disc control circuit, 5.1. Memory, 610. Optical disk device.

Claims (1)

[Claims] In an optical disk processing system including an optical disk device and an optical disk control device, the optical disk control device includes a memory and an optical disk control circuit, and when an unwritable track is detected due to a media defect or the like during data writing in the optical disk device, the content of the data track is An optical disk control device characterized in that the data is transferred to a spare track, the correspondence between the unwritable data track and the spare track is held in a memory, and during subsequent reading and writing, the memory is searched to directly read and write from the spare track.