Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1987-01-16
1989-05-23
Faber, Alan
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
360 49, 360 722, 360 32, 369 54, 369 59, G11B 509, G11B 2710
Patent
active
048336637
ABSTRACT:
Disclosed is an information recording/reproducing apparatus which uses a rewritable recording medium having a sector structure, and in which a data writing gate signal and a data erasing gate signal are reproduced on the basis of an ID detection signal of a target sector, while a data reading gate signal and a marking gate signal are produced on the basis of the ID detection signal of the target sector or on the basis of an ID detection signal of a sector located N sectors before the target one, so that when data is to be renewed in a specific sector from which no ID detection signal can be obtained, marking is performed in the specific sector on the basis of an ID detection signal of a sector located N sectors before the specific sector and new data are rewritten into a substitutive sector, whereby it is possible to perform data erasing and data recording in a target sector with high reliability and high positional accuracy and it is possible to shorten gaps respectively in front and rear of a data field to thereby make it possible to efficiently use a data area.
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Fukushima Yoshihisa
Ichinose Makoto
Kuroki Yuzuru
Satoh Isao
Takagi Yuji
Faber Alan
Matsushita Electric - Industrial Co., Ltd.
Sachar Surinder
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