JPS55125598A - Restoration system of memory content - Google Patents

Restoration system of memory content

Info

Publication number
JPS55125598A
JPS55125598A JP3258579A JP3258579A JPS55125598A JP S55125598 A JPS55125598 A JP S55125598A JP 3258579 A JP3258579 A JP 3258579A JP 3258579 A JP3258579 A JP 3258579A JP S55125598 A JPS55125598 A JP S55125598A
Authority
JP
Japan
Prior art keywords
contents
restoration
control unit
cpu1
memory
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.)
Granted
Application number
JP3258579A
Other languages
Japanese (ja)
Other versions
JPS6129025B2 (en
Inventor
Toshitaka Matsumoto
Mamoru Sugawara
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 JP3258579A priority Critical patent/JPS55125598A/en
Publication of JPS55125598A publication Critical patent/JPS55125598A/en
Publication of JPS6129025B2 publication Critical patent/JPS6129025B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Techniques For Improving Reliability Of Storages (AREA)
  • Debugging And Monitoring (AREA)
  • Multi Processors (AREA)

Abstract

PURPOSE: To aviod the effect to be given to the system by giving the restoration to the memory breakdown area via the memory contents restoration control unit and based on the memory contents of the corresponding central control unit plus other central control unit.
CONSTITUTION: When some breakdown area is detected in the contents of main memory device 3 under working of the 1st CPU1, CPU1 gives the request to the 2nd CPU2 via information transmission line 7 and based on memory contents restoration control unit 5 for reading and transfer of the contents of main memory device 4. In response to this request, CPU2 gives the answer via line 7. Thus CPU1 gives the restoration to the contents of device 3 via unit 5. It takes some time to start the normal process after CPU1 detected the memory contents, but it is only the broken area that requires the transfer and with just one word or so at most. As a result, the restoration is possible in a short time, and thus the delay time to be given to the information process of the system can be ignored substantially.
COPYRIGHT: (C)1980,JPO&Japio
JP3258579A 1979-03-21 1979-03-21 Restoration system of memory content Granted JPS55125598A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3258579A JPS55125598A (en) 1979-03-21 1979-03-21 Restoration system of memory content

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3258579A JPS55125598A (en) 1979-03-21 1979-03-21 Restoration system of memory content

Publications (2)

Publication Number Publication Date
JPS55125598A true JPS55125598A (en) 1980-09-27
JPS6129025B2 JPS6129025B2 (en) 1986-07-03

Family

ID=12362936

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3258579A Granted JPS55125598A (en) 1979-03-21 1979-03-21 Restoration system of memory content

Country Status (1)

Country Link
JP (1) JPS55125598A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60225264A (en) * 1984-04-24 1985-11-09 Hitachi Ltd Control system of shared dual memory
JPS62209642A (en) * 1986-03-10 1987-09-14 Casio Comput Co Ltd Backup system for data processor
JPH03269745A (en) * 1990-03-20 1991-12-02 Yokogawa Electric Corp Duplex processor system
US9032190B2 (en) 2009-08-24 2015-05-12 International Business Machines Corporation Recovering from an error in a fault tolerant computer system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60225264A (en) * 1984-04-24 1985-11-09 Hitachi Ltd Control system of shared dual memory
JPH0315214B2 (en) * 1984-04-24 1991-02-28 Hitachi Ltd
JPS62209642A (en) * 1986-03-10 1987-09-14 Casio Comput Co Ltd Backup system for data processor
JPH03269745A (en) * 1990-03-20 1991-12-02 Yokogawa Electric Corp Duplex processor system
US9032190B2 (en) 2009-08-24 2015-05-12 International Business Machines Corporation Recovering from an error in a fault tolerant computer system

Also Published As

Publication number Publication date
JPS6129025B2 (en) 1986-07-03

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