Disk-shaped recording medium and disk recording or reproducing d

Details Disk-shaped recording medium and disk recording or reproducing d Disk-shaped recording medium and disk recording or reproducing d

1998-10-22

1999-09-14

Huber, Paul W.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 32, G11B 509

Patent

active

059532971

ABSTRACT:
A disk-shaped recording medium has a groove only one of whose side-walls wobbles or deviates in radial directions of the disk in order to prerecord first address information. In addition, the disk medium has block areas in the groove and in the land where the first address information is given and sector areas provided with second address information for every piece of recording data which is divided into predetermined lengths, wherein `m` pieces of sector areas are allocated for `n` pieces of block areas and recorded in the groove and the land (both n and m are integral numbers, and n is smaller than m). The second address information based on the first address information enables the sectors to be set at any length, and improves reliability of the address information. Moreover, the second address information realizes high density recording using both the land and the groove.

REFERENCES:
patent: 5210738 (1993-05-01), Iwata et al.
patent: 5339302 (1994-08-01), Takahashi et al.
patent: 5377178 (1994-12-01), Saito et al.
patent: 5537373 (1996-07-01), Horikiri

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