JPS55134465A - Recovery system in system having external memory unit - Google Patents
Recovery system in system having external memory unitInfo
- Publication number
- JPS55134465A JPS55134465A JP4089579A JP4089579A JPS55134465A JP S55134465 A JPS55134465 A JP S55134465A JP 4089579 A JP4089579 A JP 4089579A JP 4089579 A JP4089579 A JP 4089579A JP S55134465 A JPS55134465 A JP S55134465A
- Authority
- JP
- Japan
- Prior art keywords
- information
- fault
- memory unit
- common information
- external 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.)
- Pending
Links
Landscapes
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
PURPOSE: To make it possible to recover the system smoothly at a system down time, by reporting a fault in common information if the fault exists and stopping information saving when common information is periodically saved into an external memory unit.
CONSTITUTION: A system is constituted by main memory unit 10, external memory unit 30 and I/O terminals 21 and 22. Common information 40 which becomes a key for the whole of the system is constituted by initial value status 41 indicating the initial value of common information and plural key constants 42 to decide a fault of common information, and information 40 is saved into unit 30 only when status 41 is not the initial value and plural constants 42 are not broken in the processing module where common information is periodically saved. In case that one or more constants 42 are broken, it is decided that a fault occurs in information 40, and the fault is reported, and information saving is stopped, and information 40 saved previously is secured, so that the system can be recovered smoothly.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4089579A JPS55134465A (en) | 1979-04-06 | 1979-04-06 | Recovery system in system having external memory unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4089579A JPS55134465A (en) | 1979-04-06 | 1979-04-06 | Recovery system in system having external memory unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55134465A true JPS55134465A (en) | 1980-10-20 |
Family
ID=12593239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4089579A Pending JPS55134465A (en) | 1979-04-06 | 1979-04-06 | Recovery system in system having external memory unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55134465A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1982001958A1 (en) * | 1980-11-28 | 1982-06-10 | Kinoshita Mitsuo | Data rewriting system for bubble memory |
JPH04263347A (en) * | 1991-02-18 | 1992-09-18 | Nec Corp | Reliability improving device for operation setting information |
-
1979
- 1979-04-06 JP JP4089579A patent/JPS55134465A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1982001958A1 (en) * | 1980-11-28 | 1982-06-10 | Kinoshita Mitsuo | Data rewriting system for bubble memory |
US4493083A (en) * | 1980-11-28 | 1985-01-08 | Fanuc Ltd. | System for updating data in bubble memories |
JPH04263347A (en) * | 1991-02-18 | 1992-09-18 | Nec Corp | Reliability improving device for operation setting information |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS52119836A (en) | Calculator control system | |
JPS55134465A (en) | Recovery system in system having external memory unit | |
JPS5347614A (en) | Control system for magnetically suspended and driven vehicle | |
JPS5378138A (en) | Processing system for multiplex interruption | |
JPS5384439A (en) | Multiple control unit | |
JPS5364421A (en) | Hot-line insertion/removal system for plug-in unit | |
JPS52116027A (en) | Memory protection circuit in small size electronic devices | |
JPS6450148A (en) | Memory resetting circuit | |
JPS5629724A (en) | Information processor | |
JPS5285444A (en) | Information processing system | |
JPS5366548A (en) | Grounding fault detector for dc circuit | |
JPS535944A (en) | Multi-system computer system constituted by simultaneous access prevention system of same data block | |
JPS52149046A (en) | Data automatic recovery system at computer abnormality time | |
JPS5434641A (en) | Relay circuit | |
JPS5289439A (en) | Computer backup system | |
JPS534834A (en) | Relay of area response type | |
JPS5323536A (en) | Malfunction prevention system | |
JPS5317294A (en) | Fault alarm circuit | |
JPS52147929A (en) | Memory | |
JPS52140843A (en) | System for supervising current differential bus bar protection relay suppressing circuit | |
JPS5314353A (en) | Decision circuit for inverter actuation | |
JPS5644945A (en) | Power failure processing system of data processing unit | |
JPS5417642A (en) | Trouble information processing system | |
JPS5298955A (en) | Carrier protection relay system | |
JPS5389632A (en) | Backup system of auxiliary memory unit |