JPS59132500A - 2-bit error correcting system - Google Patents

2-bit error correcting system

Info

Publication number
JPS59132500A
JPS59132500A JP58006947A JP694783A JPS59132500A JP S59132500 A JPS59132500 A JP S59132500A JP 58006947 A JP58006947 A JP 58006947A JP 694783 A JP694783 A JP 694783A JP S59132500 A JPS59132500 A JP S59132500A
Authority
JP
Japan
Prior art keywords
data
syndrome
read
bit
reading
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
JP58006947A
Other languages
Japanese (ja)
Other versions
JPH0241057B2 (en
Inventor
Hidehiko Kobayashi
Original Assignee
Nec Corp
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 Nec Corp filed Critical Nec Corp
Priority to JP58006947A priority Critical patent/JPH0241057B2/ja
Publication of JPS59132500A publication Critical patent/JPS59132500A/en
Publication of JPH0241057B2 publication Critical patent/JPH0241057B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/07Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1076Parity data used in redundant arrays of independent storages, e.g. in RAID systems
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/07Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1008Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices

Abstract

PURPOSE:To attain error correction up to 2-bit by providing an inverted write and re-read means re-reading a data in response to the detection of a bit error and a syndrome generating means generating a specific syndrome from a data read again. CONSTITUTION:Suppose that an error occurs in information bits D0, D8. From the read data, 110101 is generated as shown in a reading data syndrome. All bits D0-C5 of the reading data are inverted to form a rewriting data, this is read again to form a syndrome, then 001101 is obtained and it indicates that the D8 has an error. Thus, the syndrome is formed by the re-reading data and only the bit designated by the syndrome is kept as it is and all remaining re-reading data (only information bit) is inverted, then the data is corrected into the original correct data as shown in the corrected data.
JP58006947A 1983-01-19 1983-01-19 Expired - Lifetime JPH0241057B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58006947A JPH0241057B2 (en) 1983-01-19 1983-01-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58006947A JPH0241057B2 (en) 1983-01-19 1983-01-19

Publications (2)

Publication Number Publication Date
JPS59132500A true JPS59132500A (en) 1984-07-30
JPH0241057B2 JPH0241057B2 (en) 1990-09-14

Family

ID=11652420

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58006947A Expired - Lifetime JPH0241057B2 (en) 1983-01-19 1983-01-19

Country Status (1)

Country Link
JP (1) JPH0241057B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5058115A (en) * 1989-03-10 1991-10-15 International Business Machines Corp. Fault tolerant computer memory systems and components employing dual level error correction and detection with lock-up feature
JPH04338849A (en) * 1991-04-17 1992-11-26 Internatl Business Mach Corp <Ibm> Method for correcting stored error and method for reporting excess error state
JPH05210595A (en) * 1991-09-05 1993-08-20 Internatl Business Mach Corp <Ibm> Memory system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001167596A (en) * 1999-12-09 2001-06-22 Toshiba Corp Non-volatile semiconductor memory

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5058115A (en) * 1989-03-10 1991-10-15 International Business Machines Corp. Fault tolerant computer memory systems and components employing dual level error correction and detection with lock-up feature
JPH04338849A (en) * 1991-04-17 1992-11-26 Internatl Business Mach Corp <Ibm> Method for correcting stored error and method for reporting excess error state
JPH081616B2 (en) * 1991-04-17 1996-01-10 インターナショナル・ビジネス・マシーンズ・コーポレイション Memory error correction method and method of reporting excess error condition
JPH05210595A (en) * 1991-09-05 1993-08-20 Internatl Business Mach Corp <Ibm> Memory system

Also Published As

Publication number Publication date
JPH0241057B2 (en) 1990-09-14

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