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JPS56169297A - Memory backup device - Google Patents

Memory backup device

Info

Publication number
JPS56169297A
JPS56169297A JP7335080A JP7335080A JPS56169297A JP S56169297 A JPS56169297 A JP S56169297A JP 7335080 A JP7335080 A JP 7335080A JP 7335080 A JP7335080 A JP 7335080A JP S56169297 A JPS56169297 A JP S56169297A
Authority
JP
Japan
Prior art keywords
memory
data
backup
reliability
check sum
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
JP7335080A
Other languages
Japanese (ja)
Other versions
JPS6144344B2 (en
Inventor
Akira Yasuda
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP7335080A priority Critical patent/JPS56169297A/en
Publication of JPS56169297A publication Critical patent/JPS56169297A/en
Publication of JPS6144344B2 publication Critical patent/JPS6144344B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE:To perform high-reliability backup operation while using a low-reliability backup memory, such as a floppy disck, by restoring data by a data memory and the backup memory by turns. CONSTITUTION:According to a constant-time signal from an interval timer 5, etc., a CPU1 generates check sum data at constant intervals of time from the contents of a backup memory 12 which backs up an RAM data memory 3, and it is collated with previously stored check sum data. Then, if a check sum error is detected, data from the memory 3 are transferred via the CPU1 to the memory 12, whose contents are restored to correct data. Because of the system which restores the contents of the backup memory by the data memory, the memory backup device has high reliability even when a floppy disk or the like having relatively low reliability is used as the backup memory.
JP7335080A 1980-05-31 1980-05-31 Memory backup device Granted JPS56169297A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7335080A JPS56169297A (en) 1980-05-31 1980-05-31 Memory backup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7335080A JPS56169297A (en) 1980-05-31 1980-05-31 Memory backup device

Publications (2)

Publication Number Publication Date
JPS56169297A true JPS56169297A (en) 1981-12-25
JPS6144344B2 JPS6144344B2 (en) 1986-10-02

Family

ID=13515622

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7335080A Granted JPS56169297A (en) 1980-05-31 1980-05-31 Memory backup device

Country Status (1)

Country Link
JP (1) JPS56169297A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6091401A (en) * 1983-10-24 1985-05-22 Mazda Motor Corp Car controller
JPS60196027A (en) * 1984-03-19 1985-10-04 Tsubakimoto Chain Co Time-division multiplex transmission system
JPS62165241A (en) * 1986-01-17 1987-07-21 Fujitsu Ltd System identification information management method
US5146574A (en) * 1989-06-27 1992-09-08 Sf2 Corporation Method and circuit for programmable selecting a variable sequence of element using write-back
US5233692A (en) * 1990-04-06 1993-08-03 Micro Technology, Inc. Enhanced interface permitting multiple-byte parallel transfers of control information and data on a small computer system interface (SCSI) communication bus and a mass storage system incorporating the enhanced interface
JPH0627942A (en) * 1993-04-15 1994-02-04 Kawai Musical Instr Mfg Co Ltd Electronic musical instrument and its power-on processing method
US5315708A (en) * 1990-02-28 1994-05-24 Micro Technology, Inc. Method and apparatus for transferring data through a staging memory
US5325497A (en) * 1990-03-29 1994-06-28 Micro Technology, Inc. Method and apparatus for assigning signatures to identify members of a set of mass of storage devices
JPH06195271A (en) * 1992-12-24 1994-07-15 Tokyo Electric Co Ltd Data processor
US5388243A (en) * 1990-03-09 1995-02-07 Mti Technology Corporation Multi-sort mass storage device announcing its active paths without deactivating its ports in a network architecture
US5469453A (en) * 1990-03-02 1995-11-21 Mti Technology Corporation Data corrections applicable to redundant arrays of independent disks

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52130245A (en) * 1976-04-24 1977-11-01 Fujitsu Ltd Control system for information collection memory unit
JPS54105437A (en) * 1978-02-06 1979-08-18 Nippon Telegr & Teleph Corp <Ntt> Memory fault detection system
JPS5537654A (en) * 1978-09-08 1980-03-15 Nec Corp Information processor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52130245A (en) * 1976-04-24 1977-11-01 Fujitsu Ltd Control system for information collection memory unit
JPS54105437A (en) * 1978-02-06 1979-08-18 Nippon Telegr & Teleph Corp <Ntt> Memory fault detection system
JPS5537654A (en) * 1978-09-08 1980-03-15 Nec Corp Information processor

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6091401A (en) * 1983-10-24 1985-05-22 Mazda Motor Corp Car controller
JPS60196027A (en) * 1984-03-19 1985-10-04 Tsubakimoto Chain Co Time-division multiplex transmission system
JPS62165241A (en) * 1986-01-17 1987-07-21 Fujitsu Ltd System identification information management method
US5349686A (en) * 1989-06-27 1994-09-20 Mti Technology Corporation Method and circuit for programmably selecting a variable sequence of elements using write-back
US5146574A (en) * 1989-06-27 1992-09-08 Sf2 Corporation Method and circuit for programmable selecting a variable sequence of element using write-back
US5315708A (en) * 1990-02-28 1994-05-24 Micro Technology, Inc. Method and apparatus for transferring data through a staging memory
US5469453A (en) * 1990-03-02 1995-11-21 Mti Technology Corporation Data corrections applicable to redundant arrays of independent disks
US5388243A (en) * 1990-03-09 1995-02-07 Mti Technology Corporation Multi-sort mass storage device announcing its active paths without deactivating its ports in a network architecture
US5325497A (en) * 1990-03-29 1994-06-28 Micro Technology, Inc. Method and apparatus for assigning signatures to identify members of a set of mass of storage devices
US5233692A (en) * 1990-04-06 1993-08-03 Micro Technology, Inc. Enhanced interface permitting multiple-byte parallel transfers of control information and data on a small computer system interface (SCSI) communication bus and a mass storage system incorporating the enhanced interface
US5454085A (en) * 1990-04-06 1995-09-26 Mti Technology Corporation Method and apparatus for an enhanced computer system interface
JPH06195271A (en) * 1992-12-24 1994-07-15 Tokyo Electric Co Ltd Data processor
JPH0627942A (en) * 1993-04-15 1994-02-04 Kawai Musical Instr Mfg Co Ltd Electronic musical instrument and its power-on processing method

Also Published As

Publication number Publication date
JPS6144344B2 (en) 1986-10-02

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