JPS57185555A - Magnetic disc controller - Google Patents

Magnetic disc controller

Info

Publication number
JPS57185555A
JPS57185555A JP56070892A JP7089281A JPS57185555A JP S57185555 A JPS57185555 A JP S57185555A JP 56070892 A JP56070892 A JP 56070892A JP 7089281 A JP7089281 A JP 7089281A JP S57185555 A JPS57185555 A JP S57185555A
Authority
JP
Japan
Prior art keywords
magnetic disc
disc controller
channel switches
duplicated
duplication
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
JP56070892A
Other languages
Japanese (ja)
Other versions
JPH0132535B2 (en
Inventor
Akira Kurano
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 JP56070892A priority Critical patent/JPS57185555A/en
Publication of JPS57185555A publication Critical patent/JPS57185555A/en
Publication of JPH0132535B2 publication Critical patent/JPH0132535B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G06F13/4004—Coupling between buses
    • G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To realize the duplication of files and to perform automatic switching of buses, by connecting channel switches of a write control circuit of two sets of magnetic discs one after another, in the magnetic disc controller having duplicated write functions. CONSTITUTION:In a magnetic disc controller 2 having a duplicated write function, channel switches 9 of a channel 1 and directors 3 and 4 are connected one after another, and since either one of device addresses of the channel switches 9 can be selected by taking the device address of the channel switches 9 as the same, the file can be duplicated by the software without recognizing the duplication and the automatic switching of buses at the generation of a failure can be made.
JP56070892A 1981-05-12 1981-05-12 Magnetic disc controller Granted JPS57185555A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56070892A JPS57185555A (en) 1981-05-12 1981-05-12 Magnetic disc controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56070892A JPS57185555A (en) 1981-05-12 1981-05-12 Magnetic disc controller

Publications (2)

Publication Number Publication Date
JPS57185555A true JPS57185555A (en) 1982-11-15
JPH0132535B2 JPH0132535B2 (en) 1989-07-05

Family

ID=13444626

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56070892A Granted JPS57185555A (en) 1981-05-12 1981-05-12 Magnetic disc controller

Country Status (1)

Country Link
JP (1) JPS57185555A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62154365A (en) * 1985-12-27 1987-07-09 Toshiba Corp Data memory reproducing device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50105743A (en) * 1973-11-23 1975-08-20
JPS55123749A (en) * 1979-03-16 1980-09-24 Nec Corp Double recording system of magnetic disc
JPS55129820A (en) * 1979-03-30 1980-10-08 Nec Corp Selection system of input and output interface

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50105743A (en) * 1973-11-23 1975-08-20
JPS55123749A (en) * 1979-03-16 1980-09-24 Nec Corp Double recording system of magnetic disc
JPS55129820A (en) * 1979-03-30 1980-10-08 Nec Corp Selection system of input and output interface

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62154365A (en) * 1985-12-27 1987-07-09 Toshiba Corp Data memory reproducing device
JPH0375952B2 (en) * 1985-12-27 1991-12-03 Tokyo Shibaura Electric Co

Also Published As

Publication number Publication date
JPH0132535B2 (en) 1989-07-05

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