JPS5794867A - Magnetic storage device - Google Patents

Magnetic storage device

Info

Publication number
JPS5794867A
JPS5794867A JP55170948A JP17094880A JPS5794867A JP S5794867 A JPS5794867 A JP S5794867A JP 55170948 A JP55170948 A JP 55170948A JP 17094880 A JP17094880 A JP 17094880A JP S5794867 A JPS5794867 A JP S5794867A
Authority
JP
Japan
Prior art keywords
data
storage device
error
read
controller
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
JP55170948A
Other languages
Japanese (ja)
Inventor
Kunio Suzuki
Kunio Nakamura
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 JP55170948A priority Critical patent/JPS5794867A/en
Publication of JPS5794867A publication Critical patent/JPS5794867A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To avoid the loss of whole data and at the same time to preserve the latest data, by copying all data to an auxiliary storage device of the backup side immediately after the read errors of a disk occure successively. CONSTITUTION:A magnetic storage device M consists of a magnetic disk device 2, an auxiliary storage device 3 which obtains a backup copy of the device 2 and a controller 4 which controls these devices 2 and 3. The controller 4 detects the presence or absence of a read error of the data when the data is read out of the device 2. Then a retrial action is carried out for reading of the data when an error is detected, and the data of the device 2 is copied to the device 3 when the consecutive frequency of the retrials exceeds a prescribed level. Such device M is connected to a computer 1. Thus an error if occurs during a copying action can be discriminated at the computer side to avoid carrying out a wrong process of data.
JP55170948A 1980-12-05 1980-12-05 Magnetic storage device Pending JPS5794867A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55170948A JPS5794867A (en) 1980-12-05 1980-12-05 Magnetic storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55170948A JPS5794867A (en) 1980-12-05 1980-12-05 Magnetic storage device

Publications (1)

Publication Number Publication Date
JPS5794867A true JPS5794867A (en) 1982-06-12

Family

ID=15914339

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55170948A Pending JPS5794867A (en) 1980-12-05 1980-12-05 Magnetic storage device

Country Status (1)

Country Link
JP (1) JPS5794867A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60104931A (en) * 1983-11-12 1985-06-10 Copal Co Ltd Control device of color printer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60104931A (en) * 1983-11-12 1985-06-10 Copal Co Ltd Control device of color printer

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