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Drive device

A drive device and drive control technology, applied in digital recording/reproduction, instruments, data recording, etc., can solve the problems of inability to continue data recording, hard to replace area capacity, and ineffective use of user data areas, etc.

Inactive Publication Date: 2011-06-15
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0073] However, the problem in the pseudo-overwrite recording method of the write-once optical disc described above is that once the unrecorded area in the replacement area is used up, even if there is still an unrecorded area in the user data area, it cannot continue. subsequent data logging
[0075] In addition, it is difficult to determine an appropriate spare area capacity in advance considering pseudo-overwrite recording
[0076] If the capacity of the replacement area determined in advance is too large, the capacity of the user data area will decrease, and if it is too small, it will be impossible to continue recording data even if there is still an unrecorded area in the user data area.
In either case, the user data area of ​​the write-once disc cannot be effectively utilized.

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0217] 1-1. Additional recording type recording medium

[0218] FIG. 1A shows the appearance of an information recording medium 100 according to an embodiment of the present invention.

[0219] 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 the lead-in area 101 and the lead-out area 103 of the information recording medium 100 .

[0220] 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-out area 103 .

[0221] A plurality of physical sectors are allocated to the lead-in area 101...

no. 2 Embodiment approach

[0640] 2-1.NWA decision processing procedure

[0641] Here, a method for determining 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.

[0642] In this embodiment, the logical NWA is determined by the following steps.

[0643] First, the ECC cluster next to the ECC cluster including the physical sector indicated by the LRA is determined. This ECC cluster is the next recorded ECC cluster. The first physical sector where the ECC cluster is recorded becomes the next recordable position, and the next recordable position indicated by this physical address is the above-mentioned NWA.

[0644] The value of the logical NWA is the value obtained after converting the PSN value represented by the NWA into an LSN according to the initial logical address-physical address mapping.

[0645] A few specific examples are used below for i...

no. 3 Embodiment approach

[0663] 3-1. Record processing steps (1)

[0664] In the NWA determination method in the above-mentioned second embodiment, a certain LSN may not be used.

[0665] For example, in FIG. 14A, the logical sector at the position of LSN=96 is a logical sector that has never recorded data from the perspective of the host device 305 or the file system.

[0666] Such a logical sector is called an unrecorded logical sector, or an unused logical sector, an orphan logical sector, or the like.

[0667] In addition, a logical cluster composed of such unrecorded logical sectors is called an unrecorded logical cluster. For example, the positions of LSN=96 to 127 in FIG. 14A are unrecorded logical clusters.

[0668] Likewise, in FIG. 15A, the position of LSN=X2 is an unrecorded logical sector.

[0669] As shown in FIG. 14A, etc., for this unrecorded logical sector, an LSN is allocated like other common logical sectors, and the LSN of subsequent logical sectors remains unchanged. This is the...

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PUM

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Abstract

A drive device (310) includes a recording / reproducing unit (314) and a drive control unit (311). The drive control device (311) controls the recording / reproducing unit (314) to record data at the alternative destinati on position in the user data area instead of the position contained in the recording instruction (S1108) and judges whether data recording at the alternative destination position inthe user data area has been successful (S1109). If the data recording at the alternative destination position in th e user data area has failed, the drive control unit (311) controls the recording / reproducing unit (314) to record data at a position in the alternative area (S1110).

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 for recording digital data, including rewritable optical discs that allow data to be rewritten repeatedly and write-once optical discs that allow only one recording but are inexpensive. [0003] Taking such a rewritable optical disc as an example, it includes a DVD-RAM disc, a BD-RE (Blu-ray Disc Rewritable: rewritable Blu-ray Disc) disc, and the like. [0004] In addition, taking write-once optical discs as an example, DVD-R discs, BD-R (Blu-ray Disc Recordable: Blu-ray Disc Recordable) discs, and the like are included. [0005] In order to improve the reliability of the data recorded on the disc, a defect management mechanism is introduced into the rewritable optical disc. ...

Claims

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Application Information

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