JPS5564664A - Magnetic disk unit - Google Patents

Magnetic disk unit

Info

Publication number
JPS5564664A
JPS5564664A JP13821078A JP13821078A JPS5564664A JP S5564664 A JPS5564664 A JP S5564664A JP 13821078 A JP13821078 A JP 13821078A JP 13821078 A JP13821078 A JP 13821078A JP S5564664 A JPS5564664 A JP S5564664A
Authority
JP
Japan
Prior art keywords
signal
head
servo
shift
tracking
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
JP13821078A
Other languages
Japanese (ja)
Inventor
Choji Maezawa
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 JP13821078A priority Critical patent/JPS5564664A/en
Publication of JPS5564664A publication Critical patent/JPS5564664A/en
Pending legal-status Critical Current

Links

Landscapes

  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

PURPOSE: To correct completely a shift in tracking by an differential output of an odd and even signal from a servo-head by measuring and storing the shift in tracking of a data head from the servo-head.
CONSTITUTION: On arrival of the access request of a data head, places where a differential output of the odd signal and even signal of each track is zero are counted to position a servohead to a fixed track, so that the data head will be positioned temporarily to the fixed track. Head selector 15 outputs the contents of the measurement of a tracking shift value to AGE circuits 26 and 27 and an odd signal and even signal read from a servo-signal are put in an imbalance state to shift the servo-head. In this way, a correction signal is supplied to servo-signal to make it possible to correct the shift in tracking completely.
COPYRIGHT: (C)1980,JPO&Japio
JP13821078A 1978-11-09 1978-11-09 Magnetic disk unit Pending JPS5564664A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13821078A JPS5564664A (en) 1978-11-09 1978-11-09 Magnetic disk unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13821078A JPS5564664A (en) 1978-11-09 1978-11-09 Magnetic disk unit

Publications (1)

Publication Number Publication Date
JPS5564664A true JPS5564664A (en) 1980-05-15

Family

ID=15216648

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13821078A Pending JPS5564664A (en) 1978-11-09 1978-11-09 Magnetic disk unit

Country Status (1)

Country Link
JP (1) JPS5564664A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5555139A (en) * 1986-11-10 1996-09-10 Seagate Technology, Inc. Dual track servo system with position interpolation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5555139A (en) * 1986-11-10 1996-09-10 Seagate Technology, Inc. Dual track servo system with position interpolation

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