JPS5723161A - Access control system of floppy disk - Google Patents

Access control system of floppy disk

Info

Publication number
JPS5723161A
JPS5723161A JP9752180A JP9752180A JPS5723161A JP S5723161 A JPS5723161 A JP S5723161A JP 9752180 A JP9752180 A JP 9752180A JP 9752180 A JP9752180 A JP 9752180A JP S5723161 A JPS5723161 A JP S5723161A
Authority
JP
Japan
Prior art keywords
flag
main system
floppy disk
access
storage element
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
JP9752180A
Other languages
Japanese (ja)
Inventor
Takashi Matsumoto
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 JP9752180A priority Critical patent/JPS5723161A/en
Publication of JPS5723161A publication Critical patent/JPS5723161A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To improve the efficiency of use of a floppy disk by performing operating system processing by a hardware circuit. CONSTITUTION:When access from a main system is attained, a microcomputer (MC)3 discriminates first whether the flag of a storage element 4 is set or not. when the flag is set, the main system is informed of the state transition of a driver 1 and then the flag of the storage element 4 is set. When not, the MC3 refers to the flag of an index data storage element 5 to discriminate the propriety of the access from the main system. When it is not proper, erroneous access is reported to the main system to prevent the destruction of a file.
JP9752180A 1980-07-18 1980-07-18 Access control system of floppy disk Pending JPS5723161A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9752180A JPS5723161A (en) 1980-07-18 1980-07-18 Access control system of floppy disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9752180A JPS5723161A (en) 1980-07-18 1980-07-18 Access control system of floppy disk

Publications (1)

Publication Number Publication Date
JPS5723161A true JPS5723161A (en) 1982-02-06

Family

ID=14194553

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9752180A Pending JPS5723161A (en) 1980-07-18 1980-07-18 Access control system of floppy disk

Country Status (1)

Country Link
JP (1) JPS5723161A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60107155A (en) * 1983-11-16 1985-06-12 Hitachi Ltd Data protection system of storage volume

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60107155A (en) * 1983-11-16 1985-06-12 Hitachi Ltd Data protection system of storage volume

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