JPS57203163A - Device used in common by plural utilization sources - Google Patents

Device used in common by plural utilization sources

Info

Publication number
JPS57203163A
JPS57203163A JP56089180A JP8918081A JPS57203163A JP S57203163 A JPS57203163 A JP S57203163A JP 56089180 A JP56089180 A JP 56089180A JP 8918081 A JP8918081 A JP 8918081A JP S57203163 A JPS57203163 A JP S57203163A
Authority
JP
Japan
Prior art keywords
counter
read
busy signal
common
judged
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
JP56089180A
Other languages
Japanese (ja)
Inventor
Shigeo Awano
Takeo Miyata
Fujio Yamada
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56089180A priority Critical patent/JPS57203163A/en
Publication of JPS57203163A publication Critical patent/JPS57203163A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G06F13/4004—Coupling between buses
    • G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Hardware Redundancy (AREA)
  • Multi Processors (AREA)

Abstract

PURPOSE:To check the occurrence of a hang-up state by providing a counter step advanced on the execution of every prescribed processing unit, and allowing each utilization source to read the value of the counter. CONSTITUTION:The control part 6 of a disk pack device 5 is provided with a counter 8 step-advanced on the execution of every prescribed processing unit, and while the CPU1 of a system A uses the disk pack device 5, a busy signal is sent back for access from the CPU of a system B. When the busy signal is returned continuously even a certain time later, the contents of the counter 8 are read. Even if the busy signal is returned for reaccess, the contents of the counter 8 are read again. When those read values are different, it is judged that the CPU uses it continuously and when they are equal, it is judged that the system A has a fault, thereby connecting the system B while forcibly releasing the system A.
JP56089180A 1981-06-10 1981-06-10 Device used in common by plural utilization sources Pending JPS57203163A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56089180A JPS57203163A (en) 1981-06-10 1981-06-10 Device used in common by plural utilization sources

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56089180A JPS57203163A (en) 1981-06-10 1981-06-10 Device used in common by plural utilization sources

Publications (1)

Publication Number Publication Date
JPS57203163A true JPS57203163A (en) 1982-12-13

Family

ID=13963555

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56089180A Pending JPS57203163A (en) 1981-06-10 1981-06-10 Device used in common by plural utilization sources

Country Status (1)

Country Link
JP (1) JPS57203163A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55138149A (en) * 1979-04-17 1980-10-28 Hitachi Ltd Multiprocessor fault detection system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55138149A (en) * 1979-04-17 1980-10-28 Hitachi Ltd Multiprocessor fault detection system

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