JPS57103172A - Magnetic disk device - Google Patents

Magnetic disk device

Info

Publication number
JPS57103172A
JPS57103172A JP17903780A JP17903780A JPS57103172A JP S57103172 A JPS57103172 A JP S57103172A JP 17903780 A JP17903780 A JP 17903780A JP 17903780 A JP17903780 A JP 17903780A JP S57103172 A JPS57103172 A JP S57103172A
Authority
JP
Japan
Prior art keywords
servo
pitch
area
internal
external circumferential
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.)
Granted
Application number
JP17903780A
Other languages
Japanese (ja)
Other versions
JPS6239507B2 (en
Inventor
Masaaki Hayashi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP17903780A priority Critical patent/JPS57103172A/en
Publication of JPS57103172A publication Critical patent/JPS57103172A/en
Publication of JPS6239507B2 publication Critical patent/JPS6239507B2/ja
Granted 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
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks

Landscapes

  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

PURPOSE:To obtain a nearly uniform reproduction output over the entire area by varying the movement distance of a carriage according to areas by differentiating between recording and reproduction at an internal and an external circumferential area. CONSTITUTION:In an internal circumferential area 10 on the surface of a magnetic disk 3, track width 6 and track pitch 7 are both increased. In an external circumferential area 11, on the other hand, track width 8 and track pitch 9 are both decreased. In the area of a servo disk 13 which corresponds to a servo core 12 mounted on a guide arm 14, pitch servo information equal to the pitch 7 is written, and in the area of the servo disk 13 which corresponds to a servo core 12', pitch servo information equal to the pitch 9 is written. When tracks in the internal and external circumferential areas are seeked for by data cores 2 and 2', the movement of a carriage 4 is controlled by signals from the servo cores 12 and 12'.
JP17903780A 1980-12-19 1980-12-19 Magnetic disk device Granted JPS57103172A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17903780A JPS57103172A (en) 1980-12-19 1980-12-19 Magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17903780A JPS57103172A (en) 1980-12-19 1980-12-19 Magnetic disk device

Publications (2)

Publication Number Publication Date
JPS57103172A true JPS57103172A (en) 1982-06-26
JPS6239507B2 JPS6239507B2 (en) 1987-08-24

Family

ID=16059008

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17903780A Granted JPS57103172A (en) 1980-12-19 1980-12-19 Magnetic disk device

Country Status (1)

Country Link
JP (1) JPS57103172A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58175110A (en) * 1982-04-06 1983-10-14 Keiji Suzuki Disc recording system
JPS6446215A (en) * 1987-08-13 1989-02-20 Toshiba Corp Magnetic disk device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58175110A (en) * 1982-04-06 1983-10-14 Keiji Suzuki Disc recording system
JPS6446215A (en) * 1987-08-13 1989-02-20 Toshiba Corp Magnetic disk device

Also Published As

Publication number Publication date
JPS6239507B2 (en) 1987-08-24

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