JPS55162162A - Diagnostic system for error detecting-correcting circuit - Google Patents

Diagnostic system for error detecting-correcting circuit

Info

Publication number
JPS55162162A
JPS55162162A JP6991179A JP6991179A JPS55162162A JP S55162162 A JPS55162162 A JP S55162162A JP 6991179 A JP6991179 A JP 6991179A JP 6991179 A JP6991179 A JP 6991179A JP S55162162 A JPS55162162 A JP S55162162A
Authority
JP
Japan
Prior art keywords
error
data
circuit
corrected
ecc
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
Application number
JP6991179A
Other languages
Japanese (ja)
Inventor
Katsuji Tsunose
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6991179A priority Critical patent/JPS55162162A/en
Publication of JPS55162162A publication Critical patent/JPS55162162A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make it possible to diagnose the normalcy of the functions of detecting and correcting errors by generating artificial error data and by checking whether the error of the data can be detected and corrected.
CONSTITUTION: From maintenance panel 11, error correcting code ECC is transferred to ECC buffer 21 in addition to write data. The ECC is selected generating error data intentionally and it is written on a magnetic tape together with data from write data buffer 12 so as to generate the error data artificially. The group of data is supplied to error detecting-cirrecting circuit 17 via the magnetic tape to output information on whether an error exists and whether it can be corrected when so, or a corrected data group to diagnosing circuit 23. Further, a correctable error signal is sent to line 24, and an uncorrectable error signal to line 25. Circuit 23 is supplied with the output of selector 14 and signal on what kind of error has been set from panel 11. On the basis of those signals, circuit 23 checks whether circuit 17 functions normally.
COPYRIGHT: (C)1980,JPO&Japio
JP6991179A 1979-06-06 1979-06-06 Diagnostic system for error detecting-correcting circuit Pending JPS55162162A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6991179A JPS55162162A (en) 1979-06-06 1979-06-06 Diagnostic system for error detecting-correcting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6991179A JPS55162162A (en) 1979-06-06 1979-06-06 Diagnostic system for error detecting-correcting circuit

Publications (1)

Publication Number Publication Date
JPS55162162A true JPS55162162A (en) 1980-12-17

Family

ID=13416344

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6991179A Pending JPS55162162A (en) 1979-06-06 1979-06-06 Diagnostic system for error detecting-correcting circuit

Country Status (1)

Country Link
JP (1) JPS55162162A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01134763A (en) * 1987-11-19 1989-05-26 Fujitsu Ltd Diagnosing system for alternating processing for optical disk control device
JPH01227275A (en) * 1988-03-08 1989-09-11 Nec Corp Magnetic disk controller
US5631915A (en) * 1995-03-31 1997-05-20 International Business Machines Corporation Method of correcting single errors

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01134763A (en) * 1987-11-19 1989-05-26 Fujitsu Ltd Diagnosing system for alternating processing for optical disk control device
JPH01227275A (en) * 1988-03-08 1989-09-11 Nec Corp Magnetic disk controller
US5631915A (en) * 1995-03-31 1997-05-20 International Business Machines Corporation Method of correcting single errors
US5774481A (en) * 1995-03-31 1998-06-30 International Business Machines Corporation Reduced gate error detection and correction circuit

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