JPS55125598A - Restoration system of memory content - Google Patents
Restoration system of memory contentInfo
- 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
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
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)
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 |
-
1979
- 1979-03-21 JP JP3258579A patent/JPS55125598A/en active Granted
Cited By (5)
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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