JPS4860545A - - Google Patents

Info

Publication number
JPS4860545A
JPS4860545A JP9135572A JP9135572A JPS4860545A JP S4860545 A JPS4860545 A JP S4860545A JP 9135572 A JP9135572 A JP 9135572A JP 9135572 A JP9135572 A JP 9135572A JP S4860545 A JPS4860545 A JP S4860545A
Authority
JP
Japan
Prior art keywords
cylinder
faces
blocks
module
recorded
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.)
Pending
Application number
JP9135572A
Other languages
Japanese (ja)
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 filed Critical
Publication of JPS4860545A publication Critical patent/JPS4860545A/ja
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10Digital recording or reproducing
    • G11B20/12Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B20/1217Formatting, e.g. arrangement of data block or words on the record carriers on discs
    • G11B20/1252Formatting, e.g. arrangement of data block or words on the record carriers on discs for discontinuous data, e.g. digital information signals, computer programme data
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00Record carriers by type
    • G11B2220/20Disc-shaped record carriers
    • G11B2220/25Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2508Magnetic discs

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

1378983 Digital data storage INTERNATIONAL BUSINESS MACHINES CORP 6 Oct 1972 [17 Nov 1971] 46161/72 Heading G4C Data are written on sequential tracks of a disc stack cylinder until a break point is reached, after which data are written on another disc stack or on sequential tracks of another cylinder of the same stack. In one embodiment having three disc packs each with 20 disc faces, each block of data in a string corresponds in length to one track on a disc. Assuming module 0 has a first available track at cylinder 2, face 5, the first 15 blocks of a string are recorded on faces 5-19 of cylinder 2 and the next 5 blocks of the string are recorded on cylinder 3 starting at face 0, for example. Blocks 20 are recorded in module 1, for example at first available cylinder 5 of faces 10-19 and cylinder 6 of faces 0-9. Similarly blocks 40-59 are recorded in module 2 at first available cylinder 1 of faces 4-19 and cylinder 2 of faces 0-3. This arrangement may require head movement for each group-of 20 blocks, depending on the location of the first available face in each module. In a second embodiment, blocks are recorded in succession on the first available faces in each module taken in turn and head movement only takes place if overflow from the last module occurs. Taking the same example as above, blocks 0-14 are recorded in module 0, cylinder 2, faces 5-19; blocks 15-24 in module 1, cylinder 5, faces 10-19; blocks 25-39 in module 2, cylinder 1, faces 4-18; block 40 in module 2, cylinder 1, face 19; blocks 41-59 would then be recorded in module 0, cylinder 3, faces 0-18. Algorithms for calculating the addresses of the various blocks in storage are described.
JP9135572A 1971-11-17 1972-09-13 Pending JPS4860545A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19969271A 1971-11-17 1971-11-17

Publications (1)

Publication Number Publication Date
JPS4860545A true JPS4860545A (en) 1973-08-24

Family

ID=22738615

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9135572A Pending JPS4860545A (en) 1971-11-17 1972-09-13

Country Status (6)

Country Link
JP (1) JPS4860545A (en)
CA (1) CA990412A (en)
DE (1) DE2254884A1 (en)
FR (1) FR2160384B1 (en)
GB (1) GB1378983A (en)
IT (1) IT967615B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5122409A (en) * 1974-08-16 1976-02-23 Hitachi Ltd JIKIDORAMUYOINTAAFUEISU
JPS54146539A (en) * 1978-05-09 1979-11-15 Toshiba Corp Process method in response to division of magnetic disk face
JPS62217319A (en) * 1986-03-18 1987-09-24 Nec Corp Access control system for disk device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2650891B2 (en) * 1986-04-16 1997-09-10 株式会社日立製作所 Method of controlling rotary storage device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL286146A (en) * 1961-12-26
GB1169506A (en) * 1967-06-23 1969-11-05 Ncr Co Improvements in or relating to Magnetic Memory Systems.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5122409A (en) * 1974-08-16 1976-02-23 Hitachi Ltd JIKIDORAMUYOINTAAFUEISU
JPS5736615B2 (en) * 1974-08-16 1982-08-05
JPS54146539A (en) * 1978-05-09 1979-11-15 Toshiba Corp Process method in response to division of magnetic disk face
JPS62217319A (en) * 1986-03-18 1987-09-24 Nec Corp Access control system for disk device

Also Published As

Publication number Publication date
CA990412A (en) 1976-06-01
FR2160384A1 (en) 1973-06-29
DE2254884A1 (en) 1973-05-24
IT967615B (en) 1974-03-11
FR2160384B1 (en) 1977-07-29
GB1378983A (en) 1975-01-02

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