JPS5798109A - Magnetic disc control device - Google Patents

Magnetic disc control device

Info

Publication number
JPS5798109A
JPS5798109A JP17248580A JP17248580A JPS5798109A JP S5798109 A JPS5798109 A JP S5798109A JP 17248580 A JP17248580 A JP 17248580A JP 17248580 A JP17248580 A JP 17248580A JP S5798109 A JPS5798109 A JP S5798109A
Authority
JP
Japan
Prior art keywords
sector
erroneous
stored
magnetic disc
memory unit
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
JP17248580A
Other languages
Japanese (ja)
Inventor
Kaoru Konno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP17248580A priority Critical patent/JPS5798109A/en
Publication of JPS5798109A publication Critical patent/JPS5798109A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1883—Methods for assignment of alternate areas for defective areas
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

PURPOSE:To improve reliability, by regarding the sectors adjacent to the erroneous sector as erroneous sectors and moving all data stored therein to other sectors, when an erroneous sector is detected in a magnetic disc. CONSTITUTION:When an error is detected in the K-th sector, which is erroneous, of the N-th truck in a magnetic disc D, CPU apparatus 1 repeats reading action several times according to predetermined procedure and stores the address of the erroneous sector in a memory unit 4 when the result of the reading remains erroneous to the last. In the next, CPU1 searches the address of a sector adjascent to said sector, and it is stored in a memory unit 4. Further, an access operation and read-in operation are performed for the sector, and the data are stored in the memory unit 4. In addition, an appropriate replacing sector is selected, and the stored data is written in the replacing sector. With such a process, a device of high reliability is formed.
JP17248580A 1980-12-06 1980-12-06 Magnetic disc control device Pending JPS5798109A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17248580A JPS5798109A (en) 1980-12-06 1980-12-06 Magnetic disc control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17248580A JPS5798109A (en) 1980-12-06 1980-12-06 Magnetic disc control device

Publications (1)

Publication Number Publication Date
JPS5798109A true JPS5798109A (en) 1982-06-18

Family

ID=15942856

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17248580A Pending JPS5798109A (en) 1980-12-06 1980-12-06 Magnetic disc control device

Country Status (1)

Country Link
JP (1) JPS5798109A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62219264A (en) * 1985-11-20 1987-09-26 シーゲイト　テクノロジィ　インターナショナル Mapping detouring defective sector with disc drive
JPH02239472A (en) * 1989-03-13 1990-09-21 Nec Ibaraki Ltd Optical disk device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5538660A (en) * 1978-09-08 1980-03-18 Nec Corp Defective sector replacement system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5538660A (en) * 1978-09-08 1980-03-18 Nec Corp Defective sector replacement system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62219264A (en) * 1985-11-20 1987-09-26 シーゲイト　テクノロジィ　インターナショナル Mapping detouring defective sector with disc drive
JPH02239472A (en) * 1989-03-13 1990-09-21 Nec Ibaraki Ltd Optical disk device

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