JPS563468A - Magnetic disk device - Google Patents

Magnetic disk device

Info

Publication number
JPS563468A
JPS563468A JP7853279A JP7853279A JPS563468A JP S563468 A JPS563468 A JP S563468A JP 7853279 A JP7853279 A JP 7853279A JP 7853279 A JP7853279 A JP 7853279A JP S563468 A JPS563468 A JP S563468A
Authority
JP
Japan
Prior art keywords
head
magnetic disk
track
fault
speed signal
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
JP7853279A
Other languages
Japanese (ja)
Inventor
Masao Fujiki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7853279A priority Critical patent/JPS563468A/en
Publication of JPS563468A publication Critical patent/JPS563468A/en
Pending legal-status Critical Current

Links

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)

Abstract

PURPOSE: To secure the assured and high-speed detection for the fault at any part, by giving the diagnosis to the fault of a series of servo mechanisms at the first seek time.
CONSTITUTION: Difference counter 11 shows the difference in the digital value between the desired track No. given from control part 43 and the track No. on magnetic disk 20 opposing to magnetic head 18. And D/A converter 12 produces the voltage with the digital output of counter 11 used for the input. Speed signal S is subtracted from target speed signal MS by subtracting amplifier 13, and this subtraction result is delivered to power amplifier 14 to be supplied to linear motor 16 via switch 15. Carriage 17 has the reciprocation by motor 16, and thus read/write head 18 and servo head 19 have the front-back movement on both surfaces of magnetic disk 20 and in the redius direction. Thus head 18 writes in and reads out the fixed information on the track of disk 20 an in the form of the inverted magnetization.
COPYRIGHT: (C)1981,JPO&Japio
JP7853279A 1979-06-21 1979-06-21 Magnetic disk device Pending JPS563468A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7853279A JPS563468A (en) 1979-06-21 1979-06-21 Magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7853279A JPS563468A (en) 1979-06-21 1979-06-21 Magnetic disk device

Publications (1)

Publication Number Publication Date
JPS563468A true JPS563468A (en) 1981-01-14

Family

ID=13664513

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7853279A Pending JPS563468A (en) 1979-06-21 1979-06-21 Magnetic disk device

Country Status (1)

Country Link
JP (1) JPS563468A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5914175A (en) * 1982-07-14 1984-01-25 Fujitsu Ltd Magnetic disk device
JPS5960764A (en) * 1982-09-29 1984-04-06 Toshiba Corp Head positioning device
EP0607045A1 (en) * 1993-01-14 1994-07-20 Canon Kabushiki Kaisha Information recording and/or reproducing apparatus and information recording and/or reproducing method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5914175A (en) * 1982-07-14 1984-01-25 Fujitsu Ltd Magnetic disk device
JPS5960764A (en) * 1982-09-29 1984-04-06 Toshiba Corp Head positioning device
JPH0440793B2 (en) * 1982-09-29 1992-07-06 Tokyo Shibaura Electric Co
EP0607045A1 (en) * 1993-01-14 1994-07-20 Canon Kabushiki Kaisha Information recording and/or reproducing apparatus and information recording and/or reproducing method

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