IT1202807B - Apparecchiatura per il posizionamento della testina magnetica in una memoria a dischi - Google Patents

Apparecchiatura per il posizionamento della testina magnetica in una memoria a dischi

Info

Publication number
IT1202807B
IT1202807B IT30726/78A IT3072678A IT1202807B IT 1202807 B IT1202807 B IT 1202807B IT 30726/78 A IT30726/78 A IT 30726/78A IT 3072678 A IT3072678 A IT 3072678A IT 1202807 B IT1202807 B IT 1202807B
Authority
IT
Italy
Prior art keywords
positioning
equipment
magnetic head
disk memory
disk
Prior art date
Application number
IT30726/78A
Other languages
English (en)
Other versions
IT7830726A0 (it
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Publication of IT7830726A0 publication Critical patent/IT7830726A0/it
Application granted granted Critical
Publication of IT1202807B publication Critical patent/IT1202807B/it

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/54Disposition 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
    • G11B5/55Track change, selection or acquisition by displacement of the head
    • G11B5/5521Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5526Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
    • G11B5/553Details
    • G11B5/5547"Seek" control and circuits therefor
IT30726/78A 1977-12-30 1978-12-12 Apparecchiatura per il posizionamento della testina magnetica in una memoria a dischi IT1202807B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772759066 DE2759066A1 (de) 1977-12-30 1977-12-30 Einrichtung fuer die regelung der magnetkopfposition waehrend der spurauswahl und der spurfolge des magnetkopfes eines magnetplattenspeichers

Publications (2)

Publication Number Publication Date
IT7830726A0 IT7830726A0 (it) 1978-12-12
IT1202807B true IT1202807B (it) 1989-02-09

Family

ID=6027817

Family Applications (1)

Application Number Title Priority Date Filing Date
IT30726/78A IT1202807B (it) 1977-12-30 1978-12-12 Apparecchiatura per il posizionamento della testina magnetica in una memoria a dischi

Country Status (7)

Country Link
US (1) US4217612A (it)
JP (1) JPS5495214A (it)
CA (1) CA1110359A (it)
DE (1) DE2759066A1 (it)
FR (1) FR2413746A1 (it)
GB (1) GB2011654A (it)
IT (1) IT1202807B (it)

Families Citing this family (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2039078B (en) * 1978-12-27 1982-11-24 Ibm Sampled data servo positioning system
JPS55109184A (en) * 1979-02-13 1980-08-22 Victor Co Of Japan Ltd Rotational speed control system
US4384309A (en) * 1979-02-21 1983-05-17 Pertec Computer Corporation Closed loop servo demodulator for positioning a servo head
US4329721A (en) * 1980-02-11 1982-05-11 Sperry Corporation Tachometer for deriving average velocity output by sampling position signal
US4920434A (en) * 1980-09-24 1990-04-24 Quantum Corporation Fixed disk drive
US5119254A (en) * 1980-09-24 1992-06-02 Quantum Corporation Data transducer position control system for rotating disk data storage equipment
US4660106A (en) * 1980-09-24 1987-04-21 Quantum Corporation Data transducer position control system for rotating disk data storage equipment
US4386375A (en) * 1980-09-24 1983-05-31 Rca Corporation Video disc player with multiple signal recovery transducers
USRE32075E (en) * 1980-09-24 1986-01-28 Quantum Corporation Data transducer position control system for rotating disk data storage equipment
US4982296A (en) * 1980-09-24 1991-01-01 Quantum Corporation Head and disk assembly for fixed disk drive
US4381526A (en) * 1980-11-10 1983-04-26 Memorex Corporation Velocity control system for a data storage apparatus
US4620253A (en) * 1980-12-31 1986-10-28 International Business Machines Corporation Low mass actuator system for magnetic recording disk
US4532562A (en) * 1981-04-24 1985-07-30 Iomega Corporation Servo control of seek operation in magnetic disk drive
US4439800A (en) * 1981-04-24 1984-03-27 Iomega Corporation Servo control of seek operation in magnetic disk drive
US4462053A (en) * 1981-07-02 1984-07-24 Irwin International, Inc. Method for controlling a disc head
DE3280376D1 (de) * 1982-05-17 1992-01-02 Ibm Spurlagenregelung mittels servosektoren.
US4544968A (en) * 1982-05-17 1985-10-01 International Business Machines Corporation Sector servo seek control
US4486797A (en) * 1982-11-22 1984-12-04 International Business Machines Corporation Sliding mask variable resolution velocity trajectory for track following servo
US4575776A (en) * 1982-12-20 1986-03-11 International Business Machines Corporation Magnetic recording disk file servo control system including an actuator model for generating a simulated head position error signal
JPS59223939A (ja) * 1983-06-02 1984-12-15 Victor Co Of Japan Ltd 円盤状磁気記録媒体の配向処理装置
US4581664A (en) * 1983-09-21 1986-04-08 Memorex Corporation Disk accessing circuitry
US4591933A (en) * 1983-11-28 1986-05-27 Computer Memories, Incorporated Disk drive head positioner with optimized seek operation
US4685007A (en) * 1983-12-21 1987-08-04 Computer Memories, Incorporated Disk drive with track zero location system
JPS60138786A (ja) * 1983-12-27 1985-07-23 Fujitsu Ltd シ−ク制御回路
US4712146A (en) * 1985-06-04 1987-12-08 Plus Development Corporation Thin and compact micro-Winchester head and disk assembly
US4882671A (en) * 1985-06-05 1989-11-21 Plus Development Corporation Microprocessor controlled rigid disk file subsystem
US4819153A (en) * 1985-06-05 1989-04-04 Plus Development Corporation Microprocessor controlled rigid disk file subsystem
US4775903A (en) * 1986-10-14 1988-10-04 Hewlett-Packard Company Sampled servo seek and track follow system for a magnetic disc drive
WO1988002913A1 (en) * 1986-10-14 1988-04-21 Maxtor Corporation Method and apparatus for controlling the position of a moveable head assembly
AU8091887A (en) * 1986-11-10 1988-05-12 Seagate Technology, Inc. Dual track servo system
US4839876A (en) * 1987-11-23 1989-06-13 International Business Machines Corporation Track seeking using a track following loop
US5090002A (en) * 1989-03-07 1992-02-18 International Business Machines Corporation Positioning systems employing velocity and position control loops with position control loop having an extended range
JPH0378170A (ja) * 1989-08-19 1991-04-03 Sony Corp シーク制御装置
JP2760077B2 (ja) * 1989-08-29 1998-05-28 ソニー株式会社 光ディスクのシーク回路
JPH03225679A (ja) * 1990-01-31 1991-10-04 Sony Corp デイスクドライブ装置
US5231550A (en) * 1990-03-12 1993-07-27 Fujitsu Limited Track access control system preventing unintentional delay in movement of head in non-adjusted disc device
US5257251A (en) * 1990-05-25 1993-10-26 International Business Machines Corporation Single loop servo-positioning systems having means for changing the dynamic range of a position-error signal with speed of the relatively movable members
US5426545A (en) * 1991-05-09 1995-06-20 Sidman; Michael D. Active disturbance compensation system for disk drives
US5305160A (en) * 1991-07-31 1994-04-19 Seagate Technology, Inc. Compensating for variations in torque capability of voice coil motors
JP2795365B2 (ja) * 1992-05-28 1998-09-10 インターナショナル・ビジネス・マシーンズ・コーポレイション ディジタル閉ループ系制御方法およびシステム、およびそのシステムを用いたディスク型記憶装置
JP3875294B2 (ja) * 1995-11-17 2007-01-31 富士通株式会社 ディスク装置
KR100194021B1 (ko) * 1996-04-24 1999-06-15 윤종용 하드 디스크 드라이브의 반복 추종 에러 제어방법
US6222336B1 (en) 1998-06-05 2001-04-24 Seagate Technology Llc Rotational vibration detection using spindle motor velocity sense coils
US6088185A (en) * 1998-06-05 2000-07-11 Seagate Technology, Inc. Rotational vibration detection using a velocity sense coil
US6285522B1 (en) 1998-06-05 2001-09-04 Seagate Technology Llc Rotational vibration compensation using a dedicated surface with a constant frequency pattern
US6304406B1 (en) 1998-06-05 2001-10-16 Seagate Technology Llc Rotational vibration compensation using a fixed head and a constant frequency pattern
DE19983933T1 (de) 1999-02-22 2002-01-24 Seagate Technology Kompensation für wiederholbare Auslauffehler
DE19983952T1 (de) 1999-05-07 2002-06-20 Seagate Technology Llc Kompensation wiederholbaren Auslaufens mit iterativer Lernsteuerung bei einem Plattenspeichersystem
US6437936B1 (en) 1999-07-23 2002-08-20 Seagate Technology Llc Repeatable runout compensation using a learning algorithm with scheduled parameters
US6545836B1 (en) * 1999-11-12 2003-04-08 Acorn Technologies, Inc. Servo control apparatus and method using absolute value input signals
US6952320B1 (en) 1999-12-16 2005-10-04 Seagate Technology Llc Virtual tracks for repeatable runout compensation
US6707632B1 (en) 2000-02-08 2004-03-16 Seagate Technology Llc Disc drive with self-contained servo data writing capability
US6690534B2 (en) 2000-06-14 2004-02-10 Seagate Technology Llc Method and apparatus for handling multiple resonance frequencies in disc drives using active damping
US6831804B2 (en) 2000-06-20 2004-12-14 Seagate Technology Llc Method and apparatus for handling resonance effects in disc drives using active damping
US7425719B2 (en) * 2005-01-13 2008-09-16 Wd Media, Inc. Method and apparatus for selectively providing data from a test head to a processor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3185972A (en) * 1961-10-10 1965-05-25 Ibm Transducer positioning system utilizing record with interspersed data and positioning information
FR83053E (fr) * 1961-10-10 1964-06-05 Ibm Appareil d'emmagasinage de données
US3691543A (en) * 1971-02-08 1972-09-12 Ibm Positioning system including servo track configuration and associated demodulator
US3737883A (en) * 1971-08-18 1973-06-05 Information Storage Systems Linear positioning apparatus for memory disc pack drive mechanisms
US3881184A (en) * 1974-05-28 1975-04-29 Ibm Adaptive digital servo system
US3924268A (en) * 1974-08-05 1975-12-02 Ibm High density track follower control system for magnetic disk file
US4048660A (en) * 1975-12-23 1977-09-13 International Business Machines Corporation Record track following and seeking
DE2558359A1 (de) * 1975-12-23 1977-07-07 Ibm Deutschland Einstellvorrichtung fuer den zugriffsarm des magnetkopfes eines magnetplattenspeichers
US4135217A (en) * 1976-11-02 1979-01-16 Xerox Corporation Utilization of stored run-out information in a track following servo system

Also Published As

Publication number Publication date
FR2413746A1 (fr) 1979-07-27
JPS5495214A (en) 1979-07-27
DE2759066A1 (de) 1979-07-12
GB2011654A (en) 1979-07-11
US4217612A (en) 1980-08-12
GB2011654B (it)
IT7830726A0 (it) 1978-12-12
CA1110359A (en) 1981-10-06

Similar Documents

Publication Publication Date Title
IT1202807B (it) Apparecchiatura per il posizionamento della testina magnetica in una memoria a dischi
IT1097501B (it) Memoria a dischi magnetici compatta
IT1159146B (it) Apparecchiatura a dischi magnetici
IT1111143B (it) Dispositivo per il controllo del pedinamento di una testina magnetica
AT377373B (de) Magnetkopfanordnung
ATA188077A (de) Magnetkopfanordnung
IT1112277B (it) Testina magnetica perfezionata
IT1109182B (it) Testina magnetica perfezionata
IT1071478B (it) Dispositivo per prosizionare il braccio di accesso della testina magnetica di una memoria a dischi
JPS537311A (en) Magnetic head unit
ATA936577A (de) Magnetkopfanordnung
JPS5293308A (en) Magnetic head
IT1129437B (it) Testina magnetica
IT1061464B (it) Testina magnetica
JPS5345221A (en) Magnetic head
JPS53126908A (en) Magnetic recording head
JPS533212A (en) Multiielement magnetic head
JPS531011A (en) Multiielement magnetic head
JPS5366208A (en) Magnetic head
JPS5376817A (en) Magnetic head
JPS533312A (en) Magnetic head
JPS5286317A (en) Magnetic erasing head core
SU547821A1 (ru) Магнитна головка
IT1134386B (it) Cassa per nastro di misura montato in una bobina
JPS52142507A (en) Magnetic head