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DE3318279A1 - Magnetic disc drive with independent multiple heads - Google Patents

Magnetic disc drive with independent multiple heads

Info

Publication number
DE3318279A1
DE3318279A1 DE19833318279 DE3318279A DE3318279A1 DE 3318279 A1 DE3318279 A1 DE 3318279A1 DE 19833318279 DE19833318279 DE 19833318279 DE 3318279 A DE3318279 A DE 3318279A DE 3318279 A1 DE3318279 A1 DE 3318279A1
Authority
DE
Germany
Prior art keywords
magnetic disc
track
read
heads
multiple heads
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.)
Withdrawn
Application number
DE19833318279
Other languages
German (de)
Inventor
Erik Dipl.-Ing. 1000 Berlin Notthoff
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.)
Atos IT Solutions and Services Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19833318279 priority Critical patent/DE3318279A1/en
Publication of DE3318279A1 publication Critical patent/DE3318279A1/en
Withdrawn legal-status Critical Current

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
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and 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
    • 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
    • G11B5/5552—Track change, selection or acquisition by displacement of the head across disk tracks using fine positioning means for track acquisition separate from the coarse (e.g. track changing) positioning means
    • G11B5/5556—Track change, selection or acquisition by displacement of the head across disk tracks using fine positioning means for track acquisition separate from the coarse (e.g. track changing) positioning means with track following after a "seek"
    • 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
    • G11B5/5569—Track change, selection or acquisition by displacement of the head across disk tracks details of specially adapted mobile parts, e.g. electromechanical control devices
    • G11B5/5578—Multiple actuators addressing the same disk, e.g. to improve data rate or access rate

Landscapes

  • Moving Of Heads (AREA)

Abstract

Magnetic disc storage devices with multiple heads open up many new application possibilities and operating modes which are not possible with the current type of design but are desirable. In addition, this invention increases operational reliability. Since magnetic disc storage devices will also continue to remain the most important and most popular type of mass storage device, it is a good idea to extend their capabilities in the way described. A search conducted by the Technical University of Berlin (Elektro-Information Berlin) with respect to this invention revealed that no research work, investigations, results or patents are filed under any of the relevant key words in the INKA INSPEC or ZDE literature databases.

Description

Beschreibungdescription

Titel Maqnetplattenlaufwerk mit unabhängigen Mehrfachköpfen Die Erfindung betrifft die Ausstattung von Magnetpltten laufwerken mit mehr als einem unabhängig steuerbaren Arm, der jeweils Träger eines kombinierten Schreib/lesekopfes oder nur Schreib- der nur Lesekopfes ist.Title Magnetic Disk Drive with Independent Multiple Heads The Invention concerns the equipping of magnetic disk drives with more than one independent controllable arm, each carrier of a combined read / write head or only Write which is only read head.

Die Erweiterung af mehr als einen Arm erhöht einerseits die Betriebssicherheit und bietet eine Reihe bisher nicht möglicher Betriebsweisen. Eine Reihe bekannter Probleme lassen sich durch diese Bauweise überhaupt erst lösen. The extension af more than one arm increases the operational safety on the one hand and offers a number of previously not possible modes of operation. A number of well-known Problems can only be solved with this type of construction.

Stand der Magnetplatteniaifwerke finden in großer Zahl und Vielfalt als Technik Massenspeicher in Computeranlagen Anwendung. Sie unterscheiden sich in erster Linie dadurch, ob ein starres oder flexibles Aufzeichnungsmedium verwendet wird. Über diesen wird bei hohen Rotationsgeschwindigkeiten pro Aufzeichnungsfläche ein Schreib/Lesekopf positionierbar bewegt, um auf konzentrischen Spuren Daten in Form wechselnder Magnetisierung abzulegen.Stand of the Magnetplatteniaifwerke can be found in great number and variety as a technology mass storage in computer systems application. They are different primarily by whether a rigid or flexible recording medium is used will. About this is at high rotational speeds per recording surface a positionable read / write head moves data in on concentric tracks Store the form of changing magnetization.

-Die ständige Weiterentwicklung der Plattenlaufwerke hat in 25 Jahren zu einer Steigerung der spezifischen Speicherkapazität um 4 Größenordnungen geführt (s. IBM Journal of Research and Development, 25,1981,5,S. 677-689). Obgleich zuweilen eine Ablösung durch andere Medien (oubble Memory, Laserplatten, etc. ) vorhergesagt wurde, weisen neue Forschungsergebnisse auf eine Fortsetzung des verbreiteten Einsatzes hin (s. Quest for more storage, Computer Decisions, Dez. 1982 S. 168-200). -The constant advancement of disk drives has been in 25 years led to an increase in specific storage capacity by 4 orders of magnitude (see IBM Journal of Research and Development, 25, 1981, 5, pp. 677-689). Although sometimes a replacement by other media (bubble memory, laser disks, etc.) predicted new research points to a continuation of the widespread use (see Quest for more storage, Computer Decisions, Dec. 1982, pp. 168-200).

Alle beschriebenen und existierenden Magnetplattenlaufwerke benutzen immer nur einen Arm der einen oder mehrere Köpfe als Aggregat in Form eines Kammes über den Magnetaufzeichnungsflächen positioniert. Use all described and existing magnetic disk drives always only one arm of the one or more heads as an aggregate in the form of a comb positioned above the magnetic recording surfaces.

Kritik des Die Verwendung nur eines Armes läßt bei Ausfall eines Kopfes Standes der keinen Datenzugriff mehr zu. Es entfällt die Möglichkeit, Technik Köpfe entsprechend ihrer Aufgabe - nur Lesen oder hauptsächlich Lesen; nur Schreiben oder hauptsächlich Schreiben - zu optimieren. Außerdem besteht während des Betriebes keine Mög lichkeit, Abweichungen von der Standardspurbelequng zu erkennen und durch Justage zu beheben. Auch der Schutz vor unbeabsichtigtem Überschreiben von Daten ist nicht optimal gelöst, Magnetplattenlaufwerk mit unabhängigen Mehrfachköpfen und die Erhöhung der Daten integrität ist wegen mangelnder Redundanz schwierig. Die Erhöhung der Zugriffsgeschwindigkeit stößt bereits an Grenzen der Masseträgheit.Criticism of the use of only one arm in case of a head failure No more data access. It eliminates the possibility of technology heads according to their task - reading only or mainly reading; just write or mainly writing - to optimize. In addition, there is during operation no possibility to detect deviations from the standard gauge and through Fix adjustment. Also protection against unintentional overwriting of data is not optimally solved, Magnetic disk drive with independent Multiple heads and the increase in data integrity is due to a lack of redundancy difficult. The increase in access speed is already reaching its limits Inertia.

Aufgabe Die aufhabe wird erfindungsgemäß dadurch gelöst, daß mindestens zwei unabhängig steuerbare Arme angebracht werden, die im Normalbetrieb eine Aufqabenteilung - ein Arm nur Schreiben ein Arm nur Lesen - vornehmen.Object The object is achieved according to the invention in that at least two independently controllable arms are attached, which in normal operation a division of tasks - one arm only writing one arm only reading - make.

Weitere Ausge- Durch die Ausgestaltung der Steuereinheit in Abstimmung auf staltung der Zahl n der Arme können die oben angeführten Probleme besser Erfindung oder überhaupt erst gelöst werden. Gleichzeitig wird die Zugriffszeit wesentlich verbessert, nämlich um den Faktor n Erz Be 3 bare. Im Einzelbenutzerbetrieb kleiner Anlagen bringt die Erfindung Vorteile folgende Vorteile: höhere Datensicherheit durch Redundanz; die Möglichkeit, mehrere Datenbanken auch physikalisch getrennt auf einem Laufwerk zu führen; Warnung vor Justierungsdrift oder sogar automatische Nachjustierung.Further details by the design of the control unit in coordination On the design of the number n of the arms, the above-mentioned problems can better invention or be resolved in the first place. At the same time, the access time becomes essential improved, namely by the factor n ore Be 3 bare. Smaller in single-user operation Systems, the invention brings the following advantages: higher data security through redundancy; the possibility of several databases also physically separated to lead on a drive; Warning of adjustment drift or even automatic Readjustment.

Im Mehrbenutzerbetrieb bietet die Erfindung folgende zusätzliche Vorteile: Dauernd aktualisierte Datenbanken erlauben nur lesenden Monitoren koninuierliches refresh der dargestellten Dateninhalte; sehr schnelle Arme zum Lesen und Schreiben können die CPU des Rechners bedienen, langsamere - nur zum Lesenkönnen Monitore Drucker und sonstige Peripherie bedienen Außerdem lassen sich die Köpfe auf die jeweilige Hauptaufgabe - nur Lesen oder nur Schreiben - optimieren, oder bei Aufteilung nach Spurgruppen entsprechend der Flughöhe. In multi-user operation, the invention offers the following additional Advantages: Constantly updated databases allow only reading monitors continuously refresh the displayed data content; very quick arms for reading and writing can operate the CPU of the computer, slower ones - monitors can only read Operate printer and other peripherals In addition, the heads can be clicked on respective main task - read only or write only - optimize, or split up according to lane groups according to the flight altitude.

Beschreibung Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen eines Ausfüh- schematisch dargestellt. Es zeigen: rungsbeispiels Figur 1 Aufsicht auf eine Magnetplatte mit Mehrfacharm und Kopf a) mit Schwenkarm b) mit Lineararm Figur 2 Seitenansicht eines Plattenstapels mit Mehrfacharm und Kopf Magnetplattenlaufwerk mit unabhängigen Mehrfachköpfen Figur 3 Grundschema der Steuerung a! Prinzip b) Blockschaltbild Figur 1 zeigt schmetisch von oben: 1= Armen 2= Magne 1a) zeigt 2 die Anordnung von 2 = 2 Armen mit Diese Bauweise läßt ein Maximum von n = 4 zu 1b) zeigt den Einsatz linear gesteuerter Arm zahl n ist hier von der Bauweise der Armantriebe abhängiq Mit bekannten Konstruktionen ist mindestens n = 6 erreichbar.Description An embodiment of the invention is shown in the drawings of an execution shown schematically. They show: example Figure 1 top view on a magnetic disk with multiple arm and head a) with swivel arm b) with linear arm FIG. 2 side view of a stack of plates with multiple arms and heads Magnetic disk drive with independent multiple heads Figure 3 Basic scheme of the control a! Principle b) Block diagram Figure 1 shows schematically from above: 1 = arms 2 = magnets 1a) shows 2 the arrangement of 2 = 2 arms with this construction allows a maximum of n = 4 to 1b) shows the use of linearly controlled number of arms n depends on the design of the arm drives dependent With known constructions, at least n = 6 can be achieved.

Figur 2 zeigt die Möglichkeit außer Mehrfach Plattenebene auch Mehrfachköpfe bei Plattens sieren.FIG. 2 shows the possibility of multiple heads as well as multiple plate levels sizing at records.

Figur 3 zeigt schematisch das Zusammenwirken: architektur 3a! zeigt das Prinzip der Anordnuna on Rechner (CPU) Arbeits-und Messenspeieher.Figure 3 shows schematically the interaction: architecture 3a! shows the principle of the arrangement of the computer (CPU) working and measuring memory.

3b) zeigt das Blockschaltbild einer intelligenten Steuerung bei der im Proqramm ROM die verschiedenen Betriebsmöglichkeiten gespeichert und bei Bedarf abgerufen werden können. 3b) shows the block diagram of an intelligent controller in the the various operating options are saved in the program ROM and if necessary can be accessed.

- L e e r s e i t e -- L e r s e i t e -

Claims (1)

Patentan sprüche: Oberbegriff: 1 Magnetplattenlaufwerk für die Massenspeicherung von Daten für Computeranlagen, d a d u r c h g e k e n n z e i c h n e t, daß Schreib- und Leseköpfe getrennt und unabhängig ste@erbar die speichernde Magnetcctlicht ar,fahren können 2. Magnetplattenlaufwerk nach Anspruch 1, d a d u r c h g e k e n nzeichnet, daß die SteuereWnheit folgende MöglichkeiAen zuläßt: a) Arm 1 bis n-kann durch Steuersignal unabhängig auf Jede gewünschte und zulässige Position (Spur) der speichernden Magnetschicht gefahren werden, um die dort liegende Spur zu lesen oder zu beschrieben b) Abweichungen von der Nennposition der einzelnen Spuren werden durch Vergleich der Lese-Signalpegel erkannt und signalisiert oder führen zu automatischer Justage.Patent claims: General term: 1 magnetic disk drive for mass storage of data for computer systems, it is not indicated that writing and read heads move separately and independently controllable the storing magnetic light ar can 2. magnetic disk drive according to claim 1, d a d u r c h g e k e n n that the control unit allows the following possibilities: a) Arm 1 to n-can by control signal independently to any desired and permissible position (track) of the storing magnetic layer be driven in order to read or write to the track located there b) Deviations from the nominal position of the individual tracks are determined by comparing the read signal levels recognized and signaled or lead to automatic adjustment. c) Spuren können in n Gruppen (entsprechend der Anzahl der Arme und Köpfe unterteilt werden. Spurgruppen werden dann jeweils nur von einem für diese Spurlage optimierten Kopf bedient. c) tracks can be divided into n groups (according to the number of arms and Heads are divided. Track groups are then only used by one for this Track position optimized head served.
DE19833318279 1983-05-17 1983-05-17 Magnetic disc drive with independent multiple heads Withdrawn DE3318279A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19833318279 DE3318279A1 (en) 1983-05-17 1983-05-17 Magnetic disc drive with independent multiple heads

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833318279 DE3318279A1 (en) 1983-05-17 1983-05-17 Magnetic disc drive with independent multiple heads

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DE3318279A1 true DE3318279A1 (en) 1984-11-22

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985004510A1 (en) * 1984-03-30 1985-10-10 Fay Stefan De Multi face multi videodisk reader
EP0360123A3 (en) * 1988-09-19 1990-08-29 Hitachi, Ltd. Super-large capacity data storage drive
EP0440849A1 (en) * 1988-10-24 1991-08-14 Honeywell Inc. Recording - reading head disk system
EP0410626A3 (en) * 1989-07-26 1992-05-06 Canon Kabushiki Kaisha Moving-image recording/reproducing apparatus
EP0556302A4 (en) * 1990-11-09 1993-10-13 Conner Peripherals, Inc. Multiple actuator disk drive
WO2001050468A1 (en) * 1999-12-31 2001-07-12 Cerny Otakar Ing Disk drive
WO2009019678A1 (en) * 2007-08-06 2009-02-12 David Guiser Read and write hard disk by multiple and parallel magnetic heads

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2342166A1 (en) * 1973-08-17 1975-02-20 Dieter Dr Mindt Audio or video information carrier play back instrument - is for dial-access type systems and uses several reading heads
US4331990A (en) * 1979-10-18 1982-05-25 Burroughs Corporation Flat coil linear actuator for multiple transducer arms

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2342166A1 (en) * 1973-08-17 1975-02-20 Dieter Dr Mindt Audio or video information carrier play back instrument - is for dial-access type systems and uses several reading heads
US4331990A (en) * 1979-10-18 1982-05-25 Burroughs Corporation Flat coil linear actuator for multiple transducer arms

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985004510A1 (en) * 1984-03-30 1985-10-10 Fay Stefan De Multi face multi videodisk reader
EP0360123A3 (en) * 1988-09-19 1990-08-29 Hitachi, Ltd. Super-large capacity data storage drive
US5574881A (en) * 1988-09-19 1996-11-12 Hitachi, Ltd. High capacity data storage method and system using independently controlled heads and circuitry for monitoring access frequency of data records
EP0440849A1 (en) * 1988-10-24 1991-08-14 Honeywell Inc. Recording - reading head disk system
EP0410626A3 (en) * 1989-07-26 1992-05-06 Canon Kabushiki Kaisha Moving-image recording/reproducing apparatus
US6169845B1 (en) 1989-07-26 2001-01-02 Canon Kabushiki Kaisha Moving-image data recording/reproducing apparatus for simultaneously recording/reproducing a plurality of moving image data items using a plurality of recording/reproducing means
EP0556302A4 (en) * 1990-11-09 1993-10-13 Conner Peripherals, Inc. Multiple actuator disk drive
WO2001050468A1 (en) * 1999-12-31 2001-07-12 Cerny Otakar Ing Disk drive
WO2009019678A1 (en) * 2007-08-06 2009-02-12 David Guiser Read and write hard disk by multiple and parallel magnetic heads

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Legal Events

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8139 Disposal/non-payment of the annual fee
8170 Reinstatement of the former position
8127 New person/name/address of the applicant

Owner name: NIXDORF COMPUTER AG, 4790 PADERBORN, DE

8181 Inventor (new situation)

Free format text: NOTTHOFF, ERIK, DIPL.-ING., 1000 BERLIN, DE

8110 Request for examination paragraph 44
8130 Withdrawal