JPS5654666A - Floppy disk driving device - Google Patents

Floppy disk driving device

Info

Publication number
JPS5654666A
JPS5654666A JP12986679A JP12986679A JPS5654666A JP S5654666 A JPS5654666 A JP S5654666A JP 12986679 A JP12986679 A JP 12986679A JP 12986679 A JP12986679 A JP 12986679A JP S5654666 A JPS5654666 A JP S5654666A
Authority
JP
Japan
Prior art keywords
floppy disk
writing
driving device
protection
face
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
JP12986679A
Other languages
Japanese (ja)
Inventor
Tomoyoshi Kawashita
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12986679A priority Critical patent/JPS5654666A/en
Publication of JPS5654666A publication Critical patent/JPS5654666A/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
    • 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
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To realize the protection of writing with every single face, by detecting the writing inhibition mark provided on both faces of a floppy disk through the sensor corresponding to each face. CONSTITUTION:The inhibition marks on both faces of a floppy disk are detected by the phototransistors 18 and 27 of the sensors 6 and 25 corresponding to each face. And thus the binary logic detection output obtained by the transistors 22 and 31 give a control to the AND gate 23 to which the signals are applied via the AND gates 32 and 34 the open/close of which are controlled by the surface selection signal (c) plus the signal passed through the inverter 33. As a result, the protection of writing is given with every single face to ensure an effective use of the storage area of the disk. Furthermore, the write/read can be controlled with no use of two or more of the floppy disk driving device but by selecting the protection and nonprotection of writing via a unit of the driving device and even in case both the program and the data are stored on the surface and back faces each.
JP12986679A 1979-10-11 1979-10-11 Floppy disk driving device Pending JPS5654666A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12986679A JPS5654666A (en) 1979-10-11 1979-10-11 Floppy disk driving device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12986679A JPS5654666A (en) 1979-10-11 1979-10-11 Floppy disk driving device

Publications (1)

Publication Number Publication Date
JPS5654666A true JPS5654666A (en) 1981-05-14

Family

ID=15020215

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12986679A Pending JPS5654666A (en) 1979-10-11 1979-10-11 Floppy disk driving device

Country Status (1)

Country Link
JP (1) JPS5654666A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0144397A1 (en) * 1983-05-18 1985-06-19 Drivetec Inc. Flexible magnetic disk clamping and ejector mechanism
JPH04117714U (en) * 1991-04-04 1992-10-21 ニベツクス株式会社 temperature adjustment device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51124414A (en) * 1975-04-22 1976-10-29 Mitsubishi Electric Corp Protective apparatus for magnetic sheet
JPS5317775U (en) * 1976-07-26 1978-02-15

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51124414A (en) * 1975-04-22 1976-10-29 Mitsubishi Electric Corp Protective apparatus for magnetic sheet
JPS5317775U (en) * 1976-07-26 1978-02-15

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0144397A1 (en) * 1983-05-18 1985-06-19 Drivetec Inc. Flexible magnetic disk clamping and ejector mechanism
JPH04117714U (en) * 1991-04-04 1992-10-21 ニベツクス株式会社 temperature adjustment device

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