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Drive device

A driving device and motion technology, applied in the direction of instruments, electrical digital data processing, recording information storage, etc., can solve problems such as ineffective use of user data area, inability to continue data recording, difficulty in replacing area capacity, etc.

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, 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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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0206] 1-1. Additional recording type recording medium

[0207] FIG. 1A shows the appearance of an information recording medium 100 according to an embodiment of the present invention.

[0208] 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 .

[0209] 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 .

[0210] A plurality of physical sectors are allocated to the lead-in area 101...

no. 2 Embodiment approach

[0629] 2-1.NWA decision processing procedure

[0630] 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.

[0631] In this embodiment, the logical NWA is determined by the following steps.

[0632] 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.

[0633] 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.

[0634] A few specific examples are used below for i...

no. 3 Embodiment approach

[0652] 3-1. Record processing steps (1)

[0653] In the NWA determination method in the above-mentioned second embodiment, a certain LSN may not be used.

[0654] 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.

[0655] Such a logical sector is called an unrecorded logical sector, or an unused logical sector, an orphan logical sector, or the like.

[0656] 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.

[0657] Likewise, in FIG. 15A, the position of LSN=X2 is an unrecorded logical sector.

[0658] 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 record reproducing part (314), a drive control part (311) and a memory circuit (312). The drive control part (311) performs a step (S701) of receiving a logical next writable area request instruction which at least specifies a track, a step (S702) of deciding a capacity of at least one data which is stored in the memory circuit (312) and is to be recorded, a step (S703) of deciding a physical address, which indicates an area wherein the data can be subsequently recorded in the track specified by the logical next writable area request instruction, as the next writable area, based on the last recording position in the track specified by the logical next writable area request instruction and the capacity of at least one data to be recorded, a step (S704) of converting the next writable area into the logical next writable area, and a step (S705) of outputting the logical next writable area.

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 Applications(China)
IPC IPC(8): G11B20/12G06F3/06G06F12/00G11B20/10G11B27/00
Inventor 中村正
Owner PANASONIC CORP