JPS6280868A - Optical disc device - Google Patents

Optical disc device

Info

Publication number
JPS6280868A
JPS6280868A JP21920185A JP21920185A JPS6280868A JP S6280868 A JPS6280868 A JP S6280868A JP 21920185 A JP21920185 A JP 21920185A JP 21920185 A JP21920185 A JP 21920185A JP S6280868 A JPS6280868 A JP S6280868A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
sector
data
spare
original
index
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP21920185A
Inventor
Yoshitaka Aoki
Original Assignee
Nec Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Abstract

PURPOSE: To improve the data processing efficiency by discriminating the sector of a read data and writing the data in a spare area when an index identification signal is not recognized so as to expand the permissible range of index recognition.
CONSTITUTION: A track number and a sector number 11 identified by an index recognition circuit 6 are discriminated to write a desired data to an original sector 20 from a buffer 3. In this case, if the original sector whose number 11 is not recognized appears, positioning is applied to a spare sector 21 on the same track. Then the identification circuit 6 identifies the index of the spare sector, restarts data transfer from the buffer 3 to the spare sector to apply write. In writing the rest data, the sector is restored to the original sector area. Then the location of the original sector of the data written in the spare sector area is discriminated by decoding the original sector number 13 by a discrimination circuit 5 when reading.
COPYRIGHT: (C)1987,JPO&Japio
JP21920185A 1985-10-03 1985-10-03 Optical disc device Pending JPS6280868A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21920185A JPS6280868A (en) 1985-10-03 1985-10-03 Optical disc device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21920185A JPS6280868A (en) 1985-10-03 1985-10-03 Optical disc device

Publications (1)

Publication Number Publication Date
JPS6280868A true true JPS6280868A (en) 1987-04-14

Family

ID=16731789

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21920185A Pending JPS6280868A (en) 1985-10-03 1985-10-03 Optical disc device

Country Status (1)

Country Link
JP (1) JPS6280868A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS554693A (en) * 1978-05-26 1980-01-14 Cii Device for detecting defective sector in magnetic disk memory and assigning substituted sector
JPS576414A (en) * 1980-06-11 1982-01-13 Fujitsu Ltd Evading system for magnetic disk fault

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS554693A (en) * 1978-05-26 1980-01-14 Cii Device for detecting defective sector in magnetic disk memory and assigning substituted sector
JPS576414A (en) * 1980-06-11 1982-01-13 Fujitsu Ltd Evading system for magnetic disk fault

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