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Record/access device and record/access method

A technology for recording and reproducing devices and recording parts, applied in optical recording/reproducing/erasing methods, digital recording/reproducing, data recording, etc., capable of solving problems such as data loss

Inactive Publication Date: 2013-06-12
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, although the data to be recorded can be re-recorded correctly by retrying, the corrupted data will not be restored and will be lost

Method used

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  • Record/access device and record/access method
  • Record/access device and record/access method
  • Record/access device and record/access method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0076] figure 1 It is a figure which shows the whole structure of the information recording medium in Embodiment 1 of this invention. In addition, in Embodiment 1 of the present invention, a single-layer BD-R including only one recording layer will be described as an example of the information recording medium 100 . In addition, as a recording method for the BD-R, a recording method in the sequential recording mode will be described.

[0077] In the disc-shaped information recording medium 100 , magnetic tracks 2 (guide grooves) are formed spirally, and a plurality of subdivided clusters 3 are formed on each magnetic track 2 . Cluster 3 is a unit of error correction, the smallest unit for performing recording and reproduction operations, and may be called an ECC block or the like. In the case of BD, one cluster is, for example, 32 sectors (one sector is 2 KByte, one cluster is 64 KByte).

[0078] In addition, the area of ​​the information recording medium 100 is roughly di...

Embodiment approach 2

[0229] Figure 14 It is a figure showing the structure of the data area 5 in Embodiment 2 of this invention. Here, it is assumed that the information recording medium in Embodiment 2 of the present invention is figure 2 The illustrated BD-R, which is a write-once information recording medium 100 capable of recording only once, will be described.

[0230] Such as figure 2 As shown, the data area 5 is composed of a user data area 14 for recording user data, and ISA15 and OSA16 which are spare areas for replacement recording.

[0231] The user data area 14 is also called a volume (volume) space, and consists of a file data area 20 for recording files as user data and a file management information area (first file management information) for recording file management information for managing files. area 21, and the second file management information area 22).

[0232] In addition, in Figure 14 In , it is described that a file management information area is provided for eac...

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Abstract

A record / access device comprises: a record / access unit which carries out recording and access of data on an information recording medium; a verification unit which verifies whether the data which is recorded on the information recording medium can be properly accessed; a management information recording unit which, by using the record / access unit, records, on the information recording medium, from among a plurality of types of management information for managing the data which is recorded on the information recording medium, only management information which needs to be changed; and a management information verification unit which verifies, by using the verification unit, whether the latest management information, including the management information which does not need to be changed and is reused, can be properly accessed.

Description

technical field [0001] The present invention relates to a recording and reproducing device and a recording and reproducing method for recording and reproducing an information recording medium on which management information for managing user data is recorded. Background technique [0002] With the spread of PCs (Personal Computers) in recent years, the amount of data stored in storage devices such as hard disks has increased rapidly. In addition, the importance of protecting data has also increased due to the enforcement of internal control based on the Financial Instruments and Trading Act and the Company Act, and the increase in the amount of data lost due to failures associated with larger storage devices. [0003] In order to protect data, a method of configuring a RAID (Redundant Arrays of Inexpensive Disks) by using multiple storage devices is known. RAID is a technology to ensure redundancy, and multiple levels are defined according to structural differences. For exa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/18G11B7/004G11B20/10
CPCG11B20/1889G11B27/322G11B2020/1873G11B2220/218G11B2220/2541G11B20/18
Inventor 高桥宜久加藤寿惠伊藤基志
Owner PANASONIC CORP