GB1480468A - Disc stack data storage apparatus - Google Patents

Disc stack data storage apparatus

Info

Publication number
GB1480468A
GB1480468A GB1296376A GB1296376A GB1480468A GB 1480468 A GB1480468 A GB 1480468A GB 1296376 A GB1296376 A GB 1296376A GB 1296376 A GB1296376 A GB 1296376A GB 1480468 A GB1480468 A GB 1480468A
Authority
GB
United Kingdom
Prior art keywords
data storage
storage apparatus
stack data
disc stack
stack
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.)
Expired
Application number
GB1296376A
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 GB1480468A publication Critical patent/GB1480468A/en
Expired 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
    • 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
    • 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
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier

Landscapes

  • Special Chairs (AREA)
  • Combinations Of Kitchen Furniture (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

1480468 Magnetic disc recording and playback INTERNATIONAL BUSINESS MACHINES CORP 31 March 1976 [14 April 1975] 12963/76 Heading G5R In a rotary stack 15 of flexible data-storage discs 11, each disc 11 has an outermost track carrying identifying signals, e.g. of a characteristic frequency, which enable a magnetic sensing apparatus 30 just outside the stack to identify its axial position.
GB1296376A 1976-02-10 1976-03-31 Disc stack data storage apparatus Expired GB1480468A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB511576A GB1499071A (en) 1976-02-10 1976-02-10 Bed unit

Publications (1)

Publication Number Publication Date
GB1480468A true GB1480468A (en) 1977-07-20

Family

ID=9789999

Family Applications (2)

Application Number Title Priority Date Filing Date
GB511576A Expired GB1499071A (en) 1976-02-10 1976-02-10 Bed unit
GB1296376A Expired GB1480468A (en) 1976-02-10 1976-03-31 Disc stack data storage apparatus

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB511576A Expired GB1499071A (en) 1976-02-10 1976-02-10 Bed unit

Country Status (1)

Country Link
GB (2) GB1499071A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0068803A1 (en) * 1981-06-30 1983-01-05 Rodime PLC A method of and apparatus for, generating a unique index mark from the commutation signal of a d.c. brushless motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0068803A1 (en) * 1981-06-30 1983-01-05 Rodime PLC A method of and apparatus for, generating a unique index mark from the commutation signal of a d.c. brushless motor

Also Published As

Publication number Publication date
GB1499071A (en) 1978-01-25

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee