KR970071730A - How to detect the flying height of the head on the hard disk drive - Google Patents

How to detect the flying height of the head on the hard disk drive Download PDF

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Publication number
KR970071730A
KR970071730A KR1019960013895A KR19960013895A KR970071730A KR 970071730 A KR970071730 A KR 970071730A KR 1019960013895 A KR1019960013895 A KR 1019960013895A KR 19960013895 A KR19960013895 A KR 19960013895A KR 970071730 A KR970071730 A KR 970071730A
Authority
KR
South Korea
Prior art keywords
hard disk
disk drive
head
flying height
reference signal
Prior art date
Application number
KR1019960013895A
Other languages
Korean (ko)
Inventor
홍형기
Original Assignee
김광호
삼성전자 주식회사
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 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019960013895A priority Critical patent/KR970071730A/en
Publication of KR970071730A publication Critical patent/KR970071730A/en

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  • Supporting Of Heads In Record-Carrier Devices (AREA)

Abstract

1. 청구범위에 기재된 발명이 속한 기술분야1. Technical field to which the invention described in the claims belongs

하드 디스크 드라이브의 안정도를 개선하는데 있어서, 특히 헤드의 플라잉 높이(flying higt)를 감지하여 시스템 전체의 안정도를 높이는 방법에 관한 것이다.And more particularly, to a method for improving the stability of the entire system by sensing the flying height of the head in improving the stability of the hard disk drive.

2. 발명의 해결하려고 하는 기술적 과제2. Technical Problems to be Solved by the Invention

하드 디스크 드라이브를 오랜기간동안 사용하다보면 사용중에 행해진 많은 기계적 동작, 또는 사용중에 받은 외부 충격등으로 인하여 상기 플라잉 높이(flying higt)에 변화가 생기게 되며, 상기 변화량이 일정수준을 벗어나게 되면 헤드는 정상적인 기록/독출 동작을 할 수 없게 되며 사용자가 이를 알지 못하고 계속 사용할 시 어느순간 하드 디스크 드라이브가 동작을 멈추고 모든 데이터를 손실할 수 있는 문제점이 있었다. 그러므로, 이러한 문제점을 해결한다.When the hard disk drive is used for a long period of time, the flying higt is changed due to a lot of mechanical operations performed during use or an external shock received during use. When the amount of change exceeds a certain level, The user can not perform the write / read operation. If the user does not know the write / read operation, the hard disk drive may stop operating and lose all data at any moment. Therefore, this problem is solved.

3. 발명의 해결방법의 요지3. The point of the solution of the invention

디스크상에서 독출되는 신호의 진폭을 측정하여 헤드의 플라잉 높이(flying higt)의 변화를 감지하는 방법을 제공한다.The present invention provides a method for detecting a change in flying height of a head by measuring an amplitude of a signal read out from the disk.

4. 발명의 중요한 용도4. Important Uses of the Invention

하드 디스크 드라이브에서 헤드의 플라잉 높이를 감지하는 방법.A method for sensing the flying height of a head in a hard disk drive.

Description

하드 디스크 드라이브에서의 헤드의 플라잉 높이를 감지하는 방법How to detect the flying height of the head on the hard disk drive

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제2도는 본 발명의 실시예에 따른 헤드의 플라잉 높이를 감지하는 제어 흐름도.FIG. 2 is a control flowchart for detecting a flying height of a head according to an embodiment of the present invention; FIG.

Claims (1)

하드 디스크 드라이브에서 자기디스크에 기록된 기준신호를 독출하고 그 진폭을 측정하여 헤드의 플라잉 높이를 감지하는 방법에 있어서, 상기 자기 디스크상에 기준신호를 기록한 후 그 기준신호를 독출하여 한계진폭값을 측정하고 그 한계 진폭값을 저장하는 저장과정과, 상기 기록한 기준신호를 소정의 사용횟수마다 독출한후 그 기준신호의 진폭을 측정하는 측정과정과, 상기 측정된 기준신호의 진폭값과 저장된 한계진폭값을 비교하여 이상유무를 감지하는 검출과정과, 상기 검출과정에서 이상상태로 검출될 시 외부에 이상상태를 알려주는 과정으로 이루어짐을 특징으로 하는 하드 디스크 드라이브에서 헤드의 플라잉 높이를 감지하는 방법.A method for reading a reference signal recorded on a magnetic disk in a hard disk drive and measuring a flying height of the head by measuring amplitude thereof, the method comprising: recording a reference signal on the magnetic disk, reading the reference signal, Measuring the amplitude of the reference signal after reading the recorded reference signal every predetermined number of times of use, and comparing the amplitude value of the measured reference signal with the stored amplitude limit value Comparing the detected value with a predetermined threshold value to detect an abnormality; and detecting an abnormal state when the abnormal state is detected in the detecting step. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960013895A 1996-04-30 1996-04-30 How to detect the flying height of the head on the hard disk drive KR970071730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960013895A KR970071730A (en) 1996-04-30 1996-04-30 How to detect the flying height of the head on the hard disk drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960013895A KR970071730A (en) 1996-04-30 1996-04-30 How to detect the flying height of the head on the hard disk drive

Publications (1)

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KR970071730A true KR970071730A (en) 1997-11-07

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KR1019960013895A KR970071730A (en) 1996-04-30 1996-04-30 How to detect the flying height of the head on the hard disk drive

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100418740B1 (en) * 2000-02-09 2004-02-18 히다치 글로벌 스토리지 테크놀로지스 네덜란드 비.브이. Method for detecting abnormal magnetic head fly height, method for data writing and hard disk drive apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62159385A (en) * 1986-01-08 1987-07-15 Hitachi Ltd Measuring instrument for floating height of magnetic disk
US4777544A (en) * 1986-08-15 1988-10-11 International Business Machine Corporation Method and apparatus for in-situ measurement of head/recording medium clearance
JPH0378113A (en) * 1989-08-19 1991-04-03 Mitsubishi Electric Corp Magnetic disk device
US5168413A (en) * 1990-11-30 1992-12-01 Ibm Corporation Transducer head flying height monitoring methods and apparatus for disk drive system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62159385A (en) * 1986-01-08 1987-07-15 Hitachi Ltd Measuring instrument for floating height of magnetic disk
US4777544A (en) * 1986-08-15 1988-10-11 International Business Machine Corporation Method and apparatus for in-situ measurement of head/recording medium clearance
JPH0378113A (en) * 1989-08-19 1991-04-03 Mitsubishi Electric Corp Magnetic disk device
US5168413A (en) * 1990-11-30 1992-12-01 Ibm Corporation Transducer head flying height monitoring methods and apparatus for disk drive system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100418740B1 (en) * 2000-02-09 2004-02-18 히다치 글로벌 스토리지 테크놀로지스 네덜란드 비.브이. Method for detecting abnormal magnetic head fly height, method for data writing and hard disk drive apparatus

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