JPS57105869A - Magnetic disc device - Google Patents

Magnetic disc device

Info

Publication number
JPS57105869A
JPS57105869A JP18250580A JP18250580A JPS57105869A JP S57105869 A JPS57105869 A JP S57105869A JP 18250580 A JP18250580 A JP 18250580A JP 18250580 A JP18250580 A JP 18250580A JP S57105869 A JPS57105869 A JP S57105869A
Authority
JP
Japan
Prior art keywords
signal
address
register
cylinder
objective
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
JP18250580A
Other languages
Japanese (ja)
Inventor
Takao Suzuki
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP18250580A priority Critical patent/JPS57105869A/en
Publication of JPS57105869A publication Critical patent/JPS57105869A/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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
    • G11B5/55—Track change, selection or acquisition by displacement of the head
    • G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To achieve accurate alignment, even a defective cylinder is on a medium, by detecting a failed cylinder, storing it in a memory in advance, and controlling the alignment device based on this content. CONSTITUTION:When an objective address corresponds to a failed cylinder address, a comparison circuit 5 gives an objective address correction signal to an objective address register 4 and a difference register 7 through a signal line 107, adds the content of the register 4 and assigns an alternate cylinder. When a direction designating signal is given to the register 7 from a controller 3 through a signal line 109 and the difference being the difference signal between the objective address and the present address is given through a signal line 110, the objective address correction signal makes addition or subtraction in the direction designated with the direction designation signal.
JP18250580A 1980-12-23 1980-12-23 Magnetic disc device Pending JPS57105869A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18250580A JPS57105869A (en) 1980-12-23 1980-12-23 Magnetic disc device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18250580A JPS57105869A (en) 1980-12-23 1980-12-23 Magnetic disc device

Publications (1)

Publication Number Publication Date
JPS57105869A true JPS57105869A (en) 1982-07-01

Family

ID=16119464

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18250580A Pending JPS57105869A (en) 1980-12-23 1980-12-23 Magnetic disc device

Country Status (1)

Country Link
JP (1) JPS57105869A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60234268A (en) * 1984-05-07 1985-11-20 Toko Inc Data processing method of magnetic disk
US4742507A (en) * 1985-01-21 1988-05-03 Matsushita Electric Industrial Co., Ltd. Optical information recording and reproducing apparatus having defective-sector marking means
US4796113A (en) * 1985-12-17 1989-01-03 Brother Kogyo Kabushiki Kaisha Method and apparatus for automatically replacing defective recording tracks in data storage apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60234268A (en) * 1984-05-07 1985-11-20 Toko Inc Data processing method of magnetic disk
US4742507A (en) * 1985-01-21 1988-05-03 Matsushita Electric Industrial Co., Ltd. Optical information recording and reproducing apparatus having defective-sector marking means
US4796113A (en) * 1985-12-17 1989-01-03 Brother Kogyo Kabushiki Kaisha Method and apparatus for automatically replacing defective recording tracks in data storage apparatus

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