JPS57212604A - Magnetic disk device - Google Patents

Magnetic disk device

Info

Publication number
JPS57212604A
JPS57212604A JP9729581A JP9729581A JPS57212604A JP S57212604 A JPS57212604 A JP S57212604A JP 9729581 A JP9729581 A JP 9729581A JP 9729581 A JP9729581 A JP 9729581A JP S57212604 A JPS57212604 A JP S57212604A
Authority
JP
Japan
Prior art keywords
counter
position information
magnetic disk
data
rom13
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
JP9729581A
Other languages
Japanese (ja)
Inventor
Akihiko Ito
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP9729581A priority Critical patent/JPS57212604A/en
Publication of JPS57212604A publication Critical patent/JPS57212604A/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
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To perform efficient, error-free formating by storing a nonvolatile storage element with position information which corresponds to a defective position of a recording medium, and then using the recording medium on the basis of the contents of the storage element. CONSTITUTION:During a test of a magnetic disk 1, the entire data surface is read while a head counter 8 and a cylinder counter 9 go up successively. If there is a deffective on the data surface, a head 2 generates a pulse signal and then a write control circuit 11 is driven through a peak-value interval counter 7 to write the data in an ROM13. The values of the counter 9, a position counter 10, and the counter 7 are used as defective position information. While updating the address, the address counter 9 writes the defective position information and after the test is completed, data consisting entirely of bits 1 is written in the ROM13. Thus, efficient, error-free formating is performed.
JP9729581A 1981-06-22 1981-06-22 Magnetic disk device Pending JPS57212604A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9729581A JPS57212604A (en) 1981-06-22 1981-06-22 Magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9729581A JPS57212604A (en) 1981-06-22 1981-06-22 Magnetic disk device

Publications (1)

Publication Number Publication Date
JPS57212604A true JPS57212604A (en) 1982-12-27

Family

ID=14188501

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9729581A Pending JPS57212604A (en) 1981-06-22 1981-06-22 Magnetic disk device

Country Status (1)

Country Link
JP (1) JPS57212604A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60136957A (en) * 1983-12-26 1985-07-20 Nec Corp Control system of magnetic disc device
JPS61115273A (en) * 1984-11-10 1986-06-02 Hitachi Ltd Data recording system
JPS61118199U (en) * 1984-12-29 1986-07-25
JPS6246327A (en) * 1985-08-24 1987-02-28 Nippon Telegr & Teleph Corp <Ntt> Address designating method for large capacity memory
JPS6325869A (en) * 1986-07-17 1988-02-03 Fujitsu Ltd Memory device
JPS63117370A (en) * 1986-11-05 1988-05-21 Mitsubishi Electric Corp Disk device
JPS63224075A (en) * 1987-03-12 1988-09-19 Fujitsu Ltd Diagnosis processing system for semiconductor disk device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60136957A (en) * 1983-12-26 1985-07-20 Nec Corp Control system of magnetic disc device
JPS61115273A (en) * 1984-11-10 1986-06-02 Hitachi Ltd Data recording system
JPS61118199U (en) * 1984-12-29 1986-07-25
JPS6246327A (en) * 1985-08-24 1987-02-28 Nippon Telegr & Teleph Corp <Ntt> Address designating method for large capacity memory
JPS6325869A (en) * 1986-07-17 1988-02-03 Fujitsu Ltd Memory device
JPS63117370A (en) * 1986-11-05 1988-05-21 Mitsubishi Electric Corp Disk device
JPS63224075A (en) * 1987-03-12 1988-09-19 Fujitsu Ltd Diagnosis processing system for semiconductor disk device

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