IT8567122A1 - Apparecchiatura per registrare e leggere informazioni su un disco magnetico. - Google Patents
Apparecchiatura per registrare e leggere informazioni su un disco magnetico.Info
- Publication number
- IT8567122A1 IT8567122A1 IT1985A67122A IT6712285A IT8567122A1 IT 8567122 A1 IT8567122 A1 IT 8567122A1 IT 1985A67122 A IT1985A67122 A IT 1985A67122A IT 6712285 A IT6712285 A IT 6712285A IT 8567122 A1 IT8567122 A1 IT 8567122A1
- Authority
- IT
- Italy
- Prior art keywords
- recording
- equipment
- magnetic disk
- reading information
- reading
- Prior art date
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
-
- 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
-
- 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
- G11B5/553—Details
- G11B5/5547—"Seek" control and circuits therefor
-
- 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
- G11B5/58—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 for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—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 for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
- G11B5/59633—Servo formatting
- G11B5/59655—Sector, sample or burst servo format
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT67122/85A IT1182420B (it) | 1985-02-08 | 1985-02-08 | Apparecchiatura per registrare e leggere informazioni su un disco magnetico |
EP85309472A EP0191247B1 (en) | 1985-02-08 | 1985-12-24 | Apparatus for recording and reading information on a magnetic disk |
DE8585309472T DE3581925D1 (de) | 1985-02-08 | 1985-12-24 | Geraet zur aufzeichnung und wiedergabe von informationen auf einer magnetplatte. |
JP61025667A JPS61198477A (ja) | 1985-02-08 | 1986-02-07 | 磁気デイスク用記録/読み出し装置 |
US06/827,370 US4775902A (en) | 1985-02-08 | 1986-02-10 | Apparatus for recording and reading information on a magnetic disk with track following circuitry |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT67122/85A IT1182420B (it) | 1985-02-08 | 1985-02-08 | Apparecchiatura per registrare e leggere informazioni su un disco magnetico |
Publications (3)
Publication Number | Publication Date |
---|---|
IT8567122A0 IT8567122A0 (it) | 1985-02-08 |
IT8567122A1 true IT8567122A1 (it) | 1986-08-08 |
IT1182420B IT1182420B (it) | 1987-10-05 |
Family
ID=11299772
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT67122/85A IT1182420B (it) | 1985-02-08 | 1985-02-08 | Apparecchiatura per registrare e leggere informazioni su un disco magnetico |
Country Status (5)
Country | Link |
---|---|
US (1) | US4775902A (it) |
EP (1) | EP0191247B1 (it) |
JP (1) | JPS61198477A (it) |
DE (1) | DE3581925D1 (it) |
IT (1) | IT1182420B (it) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4992893A (en) * | 1986-02-19 | 1991-02-12 | Hitachi, Ltd. | Alignment disk for magnetic disk driving apparatus and method and apparatus for verifying tracking error of the magnetic disk driving apparatus |
US4954906A (en) * | 1986-03-04 | 1990-09-04 | Seiko Epson Corporation | Position control system for a magnetic storage device using a small sized disk |
US4775903A (en) * | 1986-10-14 | 1988-10-04 | Hewlett-Packard Company | Sampled servo seek and track follow system for a magnetic disc drive |
AU597537B2 (en) * | 1986-11-10 | 1990-05-31 | Seagate Technology, Inc. | Bipolar motor control |
KR900005438B1 (ko) * | 1987-12-11 | 1990-07-30 | 삼성전자 주식회사 | 플로피 디스크 드라이브(fdd)의 스텝모터 서보제어방식 |
GB2244395A (en) * | 1990-05-25 | 1991-11-27 | Motorola Inc | Stepper motor controller |
US5163162A (en) * | 1990-11-14 | 1992-11-10 | Ibm Corporation | System and method for data recovery in multiple head assembly storage devices |
US6713985B2 (en) * | 2000-03-31 | 2004-03-30 | Canon Kabushiki Kaisha | Drive control apparatus for stepping motor |
US7184480B1 (en) * | 2002-09-25 | 2007-02-27 | O2Micro International Limited | Digital PWM generator |
US7219172B1 (en) | 2004-06-01 | 2007-05-15 | Storage Technology Corporation | System and method of dynamically controlling storage device access duty cycle |
US7340617B1 (en) | 2004-06-01 | 2008-03-04 | Storage Technology Corporation | System and method of dynamically controlling storage device power supply current |
US7839595B1 (en) | 2008-01-25 | 2010-11-23 | Western Digital Technologies, Inc. | Feed forward compensation for fly height control in a disk drive |
US7630162B2 (en) * | 2008-02-04 | 2009-12-08 | Western Digital Technologies, Inc. | Disk drive servoing off of first head while determining fly height for second head |
US8482873B1 (en) * | 2008-02-18 | 2013-07-09 | Western Digital Technologies, Inc. | Disk drive employing pulse width modulation of head control signal |
US7675707B1 (en) | 2008-11-21 | 2010-03-09 | Western Digital Technologies, Inc. | Disk drive employing repeatable disturbance compensation for fly height control |
US8320069B1 (en) | 2010-03-18 | 2012-11-27 | Western Digital Technologies, Inc. | Disk drive detecting positive correlation in fly height measurements |
US8059357B1 (en) | 2010-03-18 | 2011-11-15 | Western Digital Technologies, Inc. | Disk drive adjusting fly height when calibrating head/disk contact |
US7916420B1 (en) | 2010-05-14 | 2011-03-29 | Western Digital Technologies, Inc. | Disk drive employing comb filter for repeatable fly height compensation |
US8300338B1 (en) | 2010-09-30 | 2012-10-30 | Western Digital Technologies, Inc. | Disk drive correlating different fly height measurements to verify disk warpage |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3562725A (en) * | 1968-10-15 | 1971-02-09 | Sperry Rand Corp | Coarse and fine positioning of magnetic read heads |
US4157577A (en) * | 1977-11-14 | 1979-06-05 | International Business Machines Corporation | Rotatable storage apparatus with digitally responsive circuitry for track selection |
US4371904A (en) * | 1980-08-22 | 1983-02-01 | Pertec Computer Corporation | Flexible magnetic disk system |
US4383209A (en) * | 1980-10-15 | 1983-05-10 | Minnesota Mining And Manufacturing Company | Control system for transducer positioning motor |
JPS5792470A (en) * | 1980-11-29 | 1982-06-09 | Yokogawa Hokushin Electric Corp | Magnetic disk device |
JPS57212665A (en) * | 1981-06-24 | 1982-12-27 | Fujitsu Ltd | Head positioning system of magnetic device |
JPS5835770A (ja) * | 1981-08-24 | 1983-03-02 | Hitachi Ltd | 磁気デイスク装置 |
US4424543A (en) * | 1981-11-16 | 1984-01-03 | Dma Systems Corporation | Method and apparatus for recording transducer positioning information |
US4630145A (en) * | 1982-02-16 | 1986-12-16 | Drivetec, Inc. | Fine positioning apparatus for floppy disk drive |
US4581567A (en) * | 1982-05-28 | 1986-04-08 | Citizen Watch Co., Ltd. | Device for feeding magnetic head |
JPS5930269A (ja) * | 1982-08-10 | 1984-02-17 | Citizen Watch Co Ltd | 磁気ヘツドの送り装置 |
US4488187A (en) * | 1982-06-04 | 1984-12-11 | Syquest Technology | Servo control apparatus |
JPS592977A (ja) * | 1982-06-26 | 1984-01-09 | 武田 賢二 | 二輪車の風雨用具 |
US4499510A (en) * | 1982-08-03 | 1985-02-12 | Weltec Digital, Inc. | Precision alignment system for information storage devices |
US4516177A (en) * | 1982-09-27 | 1985-05-07 | Quantum Corporation | Rotating rigid disk data storage device |
JPS59177768A (ja) * | 1983-03-28 | 1984-10-08 | Hitachi Ltd | フレキシブルデイスク駆動装置 |
JPS59204499A (ja) * | 1983-05-09 | 1984-11-19 | Matsushita Electric Works Ltd | ステツピングモ−タ |
US4600868A (en) * | 1983-05-09 | 1986-07-15 | Bryant Lawrence M | Open loop acceleration/deceleration control for disk drive stepper motors |
JPS59204498A (ja) * | 1983-05-09 | 1984-11-19 | Matsushita Electric Works Ltd | ステツピングモ−タ |
JPS60127576A (ja) * | 1983-12-15 | 1985-07-08 | Mitsubishi Electric Corp | 磁気デイスク装置 |
-
1985
- 1985-02-08 IT IT67122/85A patent/IT1182420B/it active
- 1985-12-24 EP EP85309472A patent/EP0191247B1/en not_active Expired - Lifetime
- 1985-12-24 DE DE8585309472T patent/DE3581925D1/de not_active Expired - Lifetime
-
1986
- 1986-02-07 JP JP61025667A patent/JPS61198477A/ja active Pending
- 1986-02-10 US US06/827,370 patent/US4775902A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0191247A3 (en) | 1987-09-02 |
IT8567122A0 (it) | 1985-02-08 |
IT1182420B (it) | 1987-10-05 |
US4775902A (en) | 1988-10-04 |
JPS61198477A (ja) | 1986-09-02 |
EP0191247B1 (en) | 1991-02-27 |
DE3581925D1 (de) | 1991-04-04 |
EP0191247A2 (en) | 1986-08-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
IT8567122A1 (it) | Apparecchiatura per registrare e leggere informazioni su un disco magnetico. | |
DE3672828D1 (de) | Datenaufzeichnungs-wiedergabegeraet. | |
DE3650417D1 (de) | Informationsaufzeichnungs- und Wiederauffindungssystem. | |
ES528823A0 (es) | Aparato para registrar yno leer informacion en un disco | |
NL194597B (nl) | Inrichting voor registratie en reproductie van informatie op een registratiemedium. | |
DE3673894D1 (de) | Servoschaltung fuer ein informationsaufzeichnungs- und/oder -wiedergabegeraet. | |
DE3682412D1 (de) | Digitales datenaufzeichnungs- und -wiedergabeverfahren. | |
IT8468144A1 (it) | Dispositivo di registrazione e riproduzione di dati su un supporto magnetico. | |
DE3678811D1 (de) | Magnetband-aufzeichnungs-/wiedergabegeraet. | |
DE3685151D1 (de) | Datenaufzeichnungs- und wiedergabegeraet. | |
DE3684528D1 (de) | Steuersignalaufzeichnungsvorrichtung fuer ein magnetisches aufzeichnungs- und wiedergabegeraet. | |
IT8221887A0 (it) | Apparato di registrazione e/o riproduzione a disco magnetico. | |
GB8515504D0 (en) | Recording information on magnetic disk | |
IT8467332A1 (it) | Apparecchiatura per registrare e/o leggere dischi magnetici. | |
DE3684663D1 (de) | Optisches informationsaufnahme- und -wiedergabegeraet. | |
DE3586171D1 (de) | Magnetische aufnahme-/wiedergabevorrichtung. | |
IT1142484B (it) | Apparecchiatura di centraggio e di montaggio per un disco di registrazione magnetica | |
DE3574303D1 (en) | Apparatus for recording and reading information on a magnetic tape | |
IT8567177A1 (it) | Apparecchiatura per registrare e leggere informazioni binarie su un disco magnetico. | |
DE3851239D1 (de) | Informationsaufnahme- und -wiedergabemethode. | |
IT8068110A0 (it) | Dispositivo per registrare e o leggere informazioni binarie su entrambe le facce di un disco magnetico flessibile | |
DE3682926D1 (de) | Magnetisches aufnahme- und wiedergabegeraet. | |
DE3685383D1 (de) | Magnetisches aufzeichnungs- und wiedergabegeraet. | |
DE3683718D1 (de) | Datenaufzeichnungs- und wiedergabegeraet. | |
DE3680564D1 (de) | Geraet zur magnetischen aufzeichnung/wiedergabe. |