Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1987-06-23
1989-05-23
Richardson, Robert L.
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
360 31, 360 53, G11B 700
Patent
active
048336653
ABSTRACT:
Method for controlling information recording in an information recording apparatus which includes a rewritable information record medium containing a data record area having a plurality of data recording blocks and an alternative area in which data to be written into a defective block in the data record area is written, and writing and reading of data to and from the blocks and erasing of data may be carried out, wherein, data is written into the respective blocks in the data record area on the information record medium, and if a data record error is detected, data to be written into the defect block is written into a block of the alternative area. When data is subsequently rewritten, contents of all blocks in the data record area to be rewritten, including the block previously determined to be defective, are erased and the new data is rewritten, and the content of the alternative area is erased. If a data record error is detected after rewriting, the data to be written into the defect block is written into a block in the alternative area.
REFERENCES:
patent: 4214280 (1980-07-01), Halfhill et al.
patent: 4611314 (1986-09-01), Ogata et al.
patent: 4631723 (1986-12-01), Rathbun et al.
patent: 4730290 (1988-03-01), Takasago et al.
Doi Takashi
Izawa Nobuyoshi
Miyazaki Michio
Takeda Toru
Tokumitsu Kenji
Hitachi , Ltd.
Nippon T & T
Richardson Robert L.
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