JPS648457A - Control device for storage device constitution - Google Patents

Control device for storage device constitution

Info

Publication number
JPS648457A
JPS648457A JP62162323A JP16232387A JPS648457A JP S648457 A JPS648457 A JP S648457A JP 62162323 A JP62162323 A JP 62162323A JP 16232387 A JP16232387 A JP 16232387A JP S648457 A JPS648457 A JP S648457A
Authority
JP
Japan
Prior art keywords
storage
main storage
storage device
constitution
extended
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
JP62162323A
Other languages
Japanese (ja)
Inventor
Shiyouichirou Yoshioka
Toshiyuki Kinoshita
Takafumi Yamada
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 JP62162323A priority Critical patent/JPS648457A/en
Publication of JPS648457A publication Critical patent/JPS648457A/en
Pending legal-status Critical Current

Links

Landscapes

  • Techniques For Improving Reliability Of Storages (AREA)
  • Memory System (AREA)
  • Memory System Of A Hierarchy Structure (AREA)
  • For Increasing The Reliability Of Semiconductor Memories (AREA)

Abstract

PURPOSE:To shorten an interruption time due to the failure of software by turning a main storage to an off line at the time of requiring the collection of dumped contents of a large scale main storage, connecting the other storage device to a system as a main storage and raising the system simultaneously with the collection of the dumped contents in the off line. CONSTITUTION:A read instruction is decoded by an instruction processor 100, the decoded result is selected by a selecting mechanism 108 including an extended storage addresses and main storage addresses and the selected result is distributed and sent to a storage device 105 or 106. Namely, reading and writing operation is executed in each access unit of the main storage device 104 and extended storage devices 105, 106, information is selected by the selecting mechanism 108, 109 and the selected information is stored in any one of the storage devices 104-106. Thus, 1st and 2nd storage devices to be utilized as the main storage device are built in the computer system, one is used as the main storage and to other is used as the extended storage.
JP62162323A 1987-07-01 1987-07-01 Control device for storage device constitution Pending JPS648457A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62162323A JPS648457A (en) 1987-07-01 1987-07-01 Control device for storage device constitution

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62162323A JPS648457A (en) 1987-07-01 1987-07-01 Control device for storage device constitution

Publications (1)

Publication Number Publication Date
JPS648457A true JPS648457A (en) 1989-01-12

Family

ID=15752350

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62162323A Pending JPS648457A (en) 1987-07-01 1987-07-01 Control device for storage device constitution

Country Status (1)

Country Link
JP (1) JPS648457A (en)

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