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Drive device

A driving device and a specific position technology, applied in the direction of instruments, data recording, recording carrier components, etc., can solve problems such as ineffective use of user data areas, inability to continue data recording, and reduced capacity of user data areas

Inactive Publication Date: 2007-07-25
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, data cannot be continued. Record
[0075] In addition, it is difficult to determine in advance an appropriate replacement area capacity in consideration of 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, there will be a situation where data cannot be recorded 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

[0195] 1-1. Additional recording type recording medium

[0196] FIG. 1A shows the appearance of an information recording medium 100 in the embodiment of the present invention.

[0197]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 disposed between the lead-in area 101 and the lead-out area 103 of the information recording medium 100 .

[0198] 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 .

[0199] A plurality of physical sectors are allocated to the lead-in area 101 , the data...

no. 2 Embodiment approach

[0618] 2-1.NWA determination processing steps

[0619] 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.

[0620] In this embodiment, the logical NWA is determined by the following steps.

[0621] Firstly, the next ECC cluster of the ECC cluster including the physical sector indicated by the LRA is determined. This ECC cluster is the next recorded ECC cluster. The head 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.

[0622] 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.

[0623] A few specific examples are used below for ...

no. 3 Embodiment approach

[0641] 3-1. Record processing steps (1)

[0642] In the NWA determination method in the above-mentioned second embodiment, a certain LSN may not be used.

[0643] 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.

[0644] Such a logical sector is called an unrecorded logical sector, or an unused logical sector, an orphan logical sector, or the like.

[0645] 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.

[0646] Likewise, in FIG. 15A, the position of LSN=X2 is an unrecorded logical sector.

[0647] 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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Abstract

A drive apparatus of the present invention includes a recording / reproduction section and a drive control section The drive control section performs a process inclduing: determining whether or not replacement management information including a replacement physical address is found in the replacement management information list, the replacement physical address matching the physical address corresponding to the logical address included in the recording instruction, when the replacement management information is not found, as a first time pseudo-overwrite recording for a location indicated by the physical address corresponding to the logical address included in the recording instruction, performing a process; and when the replacement management information is found, as a second time or more pseudo-overwrite recording for a location indicated by the physical address corresponding to the logical address included in the recording instruction, performing a process.

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 forms of information recording media have been used in the recording of digital data, including rewritable optical discs that can repeatedly rewrite data and write-once, low-cost media that can only be recorded once. Also known as one-time record) CD. [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 ...

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