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JPS5736500A - Memory check system - Google Patents

Memory check system

Info

Publication number
JPS5736500A
JPS5736500A JP11009280A JP11009280A JPS5736500A JP S5736500 A JPS5736500 A JP S5736500A JP 11009280 A JP11009280 A JP 11009280A JP 11009280 A JP11009280 A JP 11009280A JP S5736500 A JPS5736500 A JP S5736500A
Authority
JP
Japan
Prior art keywords
memory
error
address
detected
check
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
JP11009280A
Other languages
Japanese (ja)
Other versions
JPS6046457B2 (en
Inventor
Kenji Sakai
Katsunobu Noda
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 JP55110092A priority Critical patent/JPS6046457B2/en
Publication of JPS5736500A publication Critical patent/JPS5736500A/en
Publication of JPS6046457B2 publication Critical patent/JPS6046457B2/en
Expired 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
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1076—Parity data used in redundant arrays of independent storages, e.g. in RAID systems
    • 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
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1008—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices

Landscapes

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

Abstract

PURPOSE:To enable to check causes to error, by checking the information just before the write-in to a memory and storing the error address, in a memory device using an ECC system. CONSTITUTION:When information is written in a memory 1, one bit error correction check bit is added with a check bit production circuit 3. If a data bit written in l1 is transferred and a check circuit detects errors, an associative memory 6 stores the memory address of error detection. When the memory 1 is read out and any error is detected in an ECC circuit 5, the address at that time and a readout control signal are transferred to an address designation circuit 7. When coincidence is detected at the associative memory 6, the memory content is transmitted externally. If not detected, it means that no error is present at the write-in to the memory 1.
JP55110092A 1980-08-11 1980-08-11 Memory check method Expired JPS6046457B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55110092A JPS6046457B2 (en) 1980-08-11 1980-08-11 Memory check method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55110092A JPS6046457B2 (en) 1980-08-11 1980-08-11 Memory check method

Publications (2)

Publication Number Publication Date
JPS5736500A true JPS5736500A (en) 1982-02-27
JPS6046457B2 JPS6046457B2 (en) 1985-10-16

Family

ID=14526815

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55110092A Expired JPS6046457B2 (en) 1980-08-11 1980-08-11 Memory check method

Country Status (1)

Country Link
JP (1) JPS6046457B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0259843A (en) * 1988-08-26 1990-02-28 Nec Corp Memory device
JPH02236753A (en) * 1989-03-10 1990-09-19 Toshiba Corp Information storage medium

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61275833A (en) * 1985-05-31 1986-12-05 Sharp Corp Automatic both-surface copying machine equipped with original circulative feeder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0259843A (en) * 1988-08-26 1990-02-28 Nec Corp Memory device
JPH02236753A (en) * 1989-03-10 1990-09-19 Toshiba Corp Information storage medium

Also Published As

Publication number Publication date
JPS6046457B2 (en) 1985-10-16

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