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Drive device

A driving device and driving control technology, applied in the directions of instruments, data recording, record carrier parts, etc., can solve the problems of reducing the user data area, unable to use the user data area effectively, and unable to record data any more.

Inactive Publication Date: 2007-08-08
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0075] Also, assuming that simulated overwrite recording is performed, it is difficult to determine an appropriate spare area capacity in advance
[0076] If the capacity of the spare area determined in advance is large, the capacity of the user data area will be reduced. If the capacity of the spare area determined in advance is too small, it will result in a situation where data cannot be recorded even though an unrecorded area remains in the user data area. occur
In either case, the user data area of ​​the write-once disc is not efficiently utilized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0152] FIG. 1A shows the appearance of an information recording medium 100 according to an embodiment of the present invention.

[0153] A lead-in area 101 is arranged on the innermost periphery of the information recording medium 100 . A lead-out area 103 is arranged on the outermost periphery of the information recording medium 100 . A data area 102 is arranged between a lead-in area 101 and a lead-out area 103 of the information recording medium 100 .

[0154] In the lead-in area 101, reference information necessary for an optical pickup included in the recording / reproducing unit 314 described later to access the information recording medium 100, identification information with other recording media, and the like are recorded. The same information as that recorded in the lead-in area 101 is also recorded in the lead-in area 103 .

[0155] A plurality of physical sectors are allocated to the lead-in area 101 , the data area 102 and the lead-out area 103 . Each physical se...

Embodiment approach 2

[0575] 2-1.NWA determination processing steps

[0576] Here, a method for specifying the next recordable position (hereinafter referred to as logical NWA) indicated by the logical address returned by the drive device 310 in response to the request from the host device 305 will be described.

[0577] In this embodiment, the logical NWA is determined through the following steps.

[0578] First, the ECC cluster next to the ECC cluster containing the physical sector indicated by LRA is determined. This ECC cluster is the next recording ECC cluster. The head physical sector where the ECC cluster is recorded is the next recordable position, and the next recordable position indicated by this physical address is the above-mentioned NWA.

[0579] The value of the logical NWA is a value obtained by converting the value of the PSN represented by the NWA into an LSN according to the initial logical address-physical address mapping.

[0580] Hereinafter, several specific examples are us...

Embodiment approach 3

[0598] 3-1. Record processing steps (1)

[0599] In the NWA determination method of Embodiment 2 described above, a situation arises where a certain LSN is not used.

[0600] For example, in FIG. 14A, when viewed from the host device 305 or the file system, the logical sector at the position of LSN=96 is a logical sector to which no data has been recorded.

[0601] Such a logical sector is called an unrecorded logical sector, or an unused logical sector, an orphan logical sector, or the like.

[0602] In addition, a logical cluster composed of such unrecorded logical sectors is called an unrecorded logical cluster. For example, in FIG. 14A, the position of LSN=96-127 is an unrecorded logical cluster.

[0603] Likewise, in FIG. 15A, the position of LSN=X2 is an unrecorded logical sector.

[0604] As shown in FIG. 14A and the like, for such an unrecorded logical sector, an LSN is assigned in the same way as other normal logical sectors, and the LSN of subsequent logical secto...

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Abstract

A drive device (310) includes a recording / reproduction unit (314) and a drive control unit (311). The drive control device (311) receives a recording instruction at least specifying the position where data is to be recorded; decides whether the data recording performed according to the recording instruction is an additional record, a pseudo-overwrite of the first time, or a pseudo-overwrite of the second time or after; generates data containing the position information before alternation where the information in accordance with the decision result is set; and controls the recording / reproduction unit (314) so as to record the data on one of the ECC clusters of the write once type recording medium.

Description

technical field [0001] The present invention relates to a drive device for recording data on an information recording medium and reproducing the data recorded on the information recording medium. Background technique [0002] In recent years, various types of information recording media have been used to record digital data. There are rewritable optical discs that can rewrite data repeatedly, and write-once optical discs that limit the number of recording times to one and the media is cheap. . [0003] Examples of such rewritable optical discs include DVD-RAM discs, BD-RE (Blu-ray Disc Rewritable) discs, and the like. [0004] In addition, examples of write-once optical discs include DVD-R discs, BD-R (Blu-ray Disc Recordable) discs, and the like. [0005] In rewritable optical discs, a defect management mechanism is introduced in order to improve the reliability of data recorded on the disc. [0006] The defect management mechanism roughly consists of a slipping replacem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/12G11B20/10G11B27/00
Inventor 中村正
Owner PANASONIC CORP