JPS57111809A - Retry control system - Google Patents

Retry control system

Info

Publication number
JPS57111809A
JPS57111809A JP18761380A JP18761380A JPS57111809A JP S57111809 A JPS57111809 A JP S57111809A JP 18761380 A JP18761380 A JP 18761380A JP 18761380 A JP18761380 A JP 18761380A JP S57111809 A JPS57111809 A JP S57111809A
Authority
JP
Japan
Prior art keywords
record
command
reading
error
retry
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
JP18761380A
Other languages
Japanese (ja)
Inventor
Haruo Momose
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 JP18761380A priority Critical patent/JPS57111809A/en
Publication of JPS57111809A publication Critical patent/JPS57111809A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1816—Testing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1816—Testing
    • G11B2020/183—Testing wherein at least one additional attempt is made to read or write the data when a first attempt is unsuccessful

Abstract

PURPOSE:To increase the reading reliability, by securing a command retry to the recrod to which a reading error is caused through a specific means although the error arises at any part while a consecutive reading control is given to a data. CONSTITUTION:For the RdMLT.CKD command, a command retry is carried out for one record (count part, key part and data part) which is first processed. In the case of the records excepting the first one, a correctable error is caused at a data part of the record of N-1 when the record having a reading error is referred to as N. Then the unit checking is reported, and the program produces a corrected pattern and a restart CCW. And the command executes the record N at the outset. Thus the first record to be processed by the restart command is N, and a command retry is possible although a reading error arises again. Then the use is possible for the function of the internal buffer correction and the track offset.
JP18761380A 1980-12-29 1980-12-29 Retry control system Pending JPS57111809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18761380A JPS57111809A (en) 1980-12-29 1980-12-29 Retry control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18761380A JPS57111809A (en) 1980-12-29 1980-12-29 Retry control system

Publications (1)

Publication Number Publication Date
JPS57111809A true JPS57111809A (en) 1982-07-12

Family

ID=16209165

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18761380A Pending JPS57111809A (en) 1980-12-29 1980-12-29 Retry control system

Country Status (1)

Country Link
JP (1) JPS57111809A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60142418A (en) * 1983-12-28 1985-07-27 Hitachi Ltd Input/output error recovery system
JPH06124173A (en) * 1992-10-09 1994-05-06 Nec Corp Disk controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60142418A (en) * 1983-12-28 1985-07-27 Hitachi Ltd Input/output error recovery system
JPH06124173A (en) * 1992-10-09 1994-05-06 Nec Corp Disk controller

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