FR2283505A1 - Dispositif de memoire a disques flexibles et procede d'acces a ces disques - Google Patents

Dispositif de memoire a disques flexibles et procede d'acces a ces disques

Info

Publication number
FR2283505A1
FR2283505A1 FR7521479A FR7521479A FR2283505A1 FR 2283505 A1 FR2283505 A1 FR 2283505A1 FR 7521479 A FR7521479 A FR 7521479A FR 7521479 A FR7521479 A FR 7521479A FR 2283505 A1 FR2283505 A1 FR 2283505A1
Authority
FR
France
Prior art keywords
discs
accessing
memory device
flexible
flexible discs
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.)
Granted
Application number
FR7521479A
Other languages
English (en)
Other versions
FR2283505B1 (fr
Inventor
Donald E Griffiths
Paul D Dodd
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2283505A1 publication Critical patent/FR2283505A1/fr
Application granted granted Critical
Publication of FR2283505B1 publication Critical patent/FR2283505B1/fr
Granted 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
    • G11B5/48—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
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02—Details
    • G11B17/021—Selecting or spacing of record carriers for introducing the heads
    • 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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
    • G11B5/82—Disk carriers
    • G11B5/825—Disk carriers flexible discs
FR7521479A 1974-08-29 1975-07-03 Dispositif de memoire a disques flexibles et procede d'acces a ces disques Granted FR2283505A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/501,738 US3931645A (en) 1974-08-29 1974-08-29 Flexible disk storage apparatus having disks of various radii for enhancing axial disk location

Publications (2)

Publication Number Publication Date
FR2283505A1 true FR2283505A1 (fr) 1976-03-26
FR2283505B1 FR2283505B1 (fr) 1977-07-22

Family

ID=23994826

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7521479A Granted FR2283505A1 (fr) 1974-08-29 1975-07-03 Dispositif de memoire a disques flexibles et procede d'acces a ces disques

Country Status (5)

Country Link
US (1) US3931645A (fr)
JP (1) JPS5139106A (fr)
DE (1) DE2532654A1 (fr)
FR (1) FR2283505A1 (fr)
GB (1) GB1483565A (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2460849C2 (de) * 1974-12-21 1982-12-09 Ibm Deutschland Gmbh, 7000 Stuttgart Zugriffsarm mit einem Magnetkopf für einen aus einem Stapel von flexiblen Magnetplatten bestehenden Magnetplattenspeicher
US4071869A (en) * 1976-06-01 1978-01-31 International Business Machines Corporation Assembling flexible disk record structures
US4092681A (en) * 1976-12-20 1978-05-30 International Business Machines Corporation Flexible disk file access mechanism
US4148084A (en) * 1977-07-05 1979-04-03 Burroughs Corporation Flexible disk pack, related storage apparatus having disks with circumferential tab segments and associated partition means
JPS5849941B2 (ja) * 1978-11-07 1983-11-08 スペリ− ランド コ−ポレ−シヨン フレキシブルディスク記憶装置
US4348705A (en) * 1978-11-07 1982-09-07 Sperry Corporation Random access flexible disk memory
US4393425A (en) * 1981-03-30 1983-07-12 Disctron, Inc. Linear head actuator
US4945432A (en) * 1988-03-31 1990-07-31 Hoya Electronics Corporation Magnetic disk drive with brittle disks
JPH10177759A (ja) * 1996-12-16 1998-06-30 Sony Corp ディスク制御装置
US6900962B1 (en) * 1997-09-05 2005-05-31 Seagate Technology Llc High performance standard configuration disc drive having smaller-than-standard discs
US20070173183A1 (en) * 2006-01-25 2007-07-26 Keene Milford M Cutting tool with integrated abrasive trimming elements

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703713A (en) * 1971-09-24 1972-11-21 Univ Iowa State Res Found Variable diameter disc pack with cooperating head

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3852820A (en) * 1973-07-02 1974-12-03 Ibm Stabilization of partitionable memory with flexible rotating discs

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703713A (en) * 1971-09-24 1972-11-21 Univ Iowa State Res Found Variable diameter disc pack with cooperating head

Also Published As

Publication number Publication date
JPS5139106A (fr) 1976-04-01
DE2532654A1 (de) 1976-03-11
GB1483565A (en) 1977-08-24
US3931645A (en) 1976-01-06
FR2283505B1 (fr) 1977-07-22

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Legal Events

Date Code Title Description
ST Notification of lapse