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Recordable multi-layer disc information recording/reproducing device

A technology for information recording and layer information, which is applied in the direction of information recording, digital recording/reproduction, and magnetic recording on magnetic disks, and can solve problems such as incorrect placement.

Inactive Publication Date: 2004-01-28
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, for removable discs like DVD-RAM (Digital Video Disc Random Access Memory), the removed disc may not be properly placed back in the case
In this case, it may no longer be possible to write-protect the disc with the write-protect mechanism provided on the cartridge

Method used

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  • Recordable multi-layer disc information recording/reproducing device
  • Recordable multi-layer disc information recording/reproducing device
  • Recordable multi-layer disc information recording/reproducing device

Examples

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Embodiment Construction

[0019] Various embodiments of the present invention will be described below with reference to the accompanying drawings.

[0020] FIG. 1A is a side view illustrating a structural example of a rewritable multilayer disc 1 according to an embodiment of the present invention.

[0021] The disk 1 comprises: a transparent substrate 11; a recording layer 10a formed on the transparent substrate 11 as a first recording layer; a transparent spacer layer 12 formed on the recording layer 10a; a transparent spacer layer 12 formed on the transparent spacer layer as a second recording layer 12 on the recording layer 10b; and a reflective layer 13 formed on the recording layer 10b.

[0022] The structure of the disc 1 is not limited to the structure shown in FIG. 1A. The disc 1 may have any structure as long as it has the recording layer 10a as the first recording layer and the recording layer 10b as the second recording layer. In the following description, an embodiment of the present inv...

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Abstract

There is provided a rewritable multilayered disc having a plurality of recording layers. At least one of the plurality of the recording layers has a layer information region for recording layer information which includes recording prohibition information. The recording prohibition information indicates whether or not user data is prohibited from being recorded in a specific recording layer among the plurality of the recording layers.

Description

technical field [0001] The present invention relates to an information recording / reproducing apparatus for a rewritable multi-layer disc having a write-protect (recording / erasing prohibition) function. Background technique [0002] A floppy disk is recognized as a representative example of a rewritable disk with portability. Floppy disks have a write-protect mechanism. Users can use this write protection mechanism to provide write protection or cancel write protection for floppy disks. [0003] For example, in the case of selling a floppy disk storing commercial software or providing someone with a floppy disk storing important data, the floppy disk will be given write protection. This makes it possible to prevent commercial software or important data stored in the floppy disk from being erased by mistake. [0004] Whether or not a floppy disk is write-protected is determined not by an application program using the floppy disk drive, but by the firmware operating the flop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/007G11B19/04G11B19/12G11B20/00G11B23/28
CPCG11B20/00086G11B19/04G11B7/007G11B19/12G11B20/00702G11B23/288
Inventor 浅田伸
Owner PANASONIC CORP