JPS5740760A - Optical disk device - Google Patents

Optical disk device

Info

Publication number
JPS5740760A
JPS5740760A JP55115075A JP11507580A JPS5740760A JP S5740760 A JPS5740760 A JP S5740760A JP 55115075 A JP55115075 A JP 55115075A JP 11507580 A JP11507580 A JP 11507580A JP S5740760 A JPS5740760 A JP S5740760A
Authority
JP
Japan
Prior art keywords
track
starting
circumferential part
disk
recorded data
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
JP55115075A
Other languages
Japanese (ja)
Inventor
Akifumi Mori
Isao Hoshino
Teruo Murakami
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55115075A priority Critical patent/JPS5740760A/en
Publication of JPS5740760A publication Critical patent/JPS5740760A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To facilitate tracking control over a head while increasing recording density by storing data on a track starting at the outer circumferential part of a disk and a directory on a track starting at the inner circumferential part. CONSTITUTION:A data recording track 2, starting at the outer circumferential part of a disk 1, is formed spirally toward the inner circumference, and a directory recording track 3, starting at the inner circumferential part of the disk 1, is formed spirally toward the outer circumference. In this case, newly recorded data are recorded, as the word length of the recorded data varies, in succession to the terminal position of the last recorded data. Right before both the tracks 2 and 3 meet together, namely, at the point where an unrecorded part ends, the formation of the tracks is completed, utilizing the storage capacity at a maximum. Further, a head starts access at an unrecorded area, so track access is facilitated.
JP55115075A 1980-08-21 1980-08-21 Optical disk device Pending JPS5740760A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55115075A JPS5740760A (en) 1980-08-21 1980-08-21 Optical disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55115075A JPS5740760A (en) 1980-08-21 1980-08-21 Optical disk device

Publications (1)

Publication Number Publication Date
JPS5740760A true JPS5740760A (en) 1982-03-06

Family

ID=14653550

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55115075A Pending JPS5740760A (en) 1980-08-21 1980-08-21 Optical disk device

Country Status (1)

Country Link
JP (1) JPS5740760A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6046800A (en) * 1983-06-17 1985-03-13 イング・チイ・オリベツチ・アンド・チイ・エス・ピ−・ア Control circuit of step motor
EP0448378A2 (en) * 1990-03-20 1991-09-25 Sharp Kabushiki Kaisha Information recording and reproducing device
WO2000022615A1 (en) * 1998-10-14 2000-04-20 Robert Bosch Gmbh Disc-shaped recording support
US7126906B2 (en) 2000-12-21 2006-10-24 Hitachi Maxell, Ltd. Optical record carrier, drive unit, data updating method and software version-up method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6046800A (en) * 1983-06-17 1985-03-13 イング・チイ・オリベツチ・アンド・チイ・エス・ピ−・ア Control circuit of step motor
EP0448378A2 (en) * 1990-03-20 1991-09-25 Sharp Kabushiki Kaisha Information recording and reproducing device
US5434991A (en) * 1990-03-20 1995-07-18 Sharp Kabushiki Kaisha Method and apparatus for recording and reproducing information in black on a rewritable recording medium
WO2000022615A1 (en) * 1998-10-14 2000-04-20 Robert Bosch Gmbh Disc-shaped recording support
US7126906B2 (en) 2000-12-21 2006-10-24 Hitachi Maxell, Ltd. Optical record carrier, drive unit, data updating method and software version-up method

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