DE69021957D1 - Verfahren und Anordnung zur Steuerung von Schattenspeichern. - Google Patents

Verfahren und Anordnung zur Steuerung von Schattenspeichern.

Info

Publication number
DE69021957D1
DE69021957D1 DE69021957T DE69021957T DE69021957D1 DE 69021957 D1 DE69021957 D1 DE 69021957D1 DE 69021957 T DE69021957 T DE 69021957T DE 69021957 T DE69021957 T DE 69021957T DE 69021957 D1 DE69021957 D1 DE 69021957D1
Authority
DE
Germany
Prior art keywords
storage media
shadow set
operations
management operation
data
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.)
Expired - Lifetime
Application number
DE69021957T
Other languages
English (en)
Other versions
DE69021957T2 (de
Inventor
Scott H Davis
David W Thiel
William L Goleman
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.)
Digital Equipment Corp
Original Assignee
Digital Equipment Corp
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 Digital Equipment Corp filed Critical Digital Equipment Corp
Application granted granted Critical
Publication of DE69021957D1 publication Critical patent/DE69021957D1/de
Publication of DE69021957T2 publication Critical patent/DE69021957T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/1608—Error detection by comparing the output signals of redundant hardware
    • G06F11/1612—Error detection by comparing the output signals of redundant hardware where the redundant component is persistent storage
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/2053—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant
    • G06F11/2056—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant by mirroring
    • G06F11/2082—Data synchronisation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
    • G06F12/0802—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches
    • G06F12/0866—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches for peripheral storage systems, e.g. disk cache
    • 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
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
    • G11C29/70—Masking faults in memories by using spares or by reconfiguring
    • G11C29/74—Masking faults in memories by using spares or by reconfiguring using duplex memories, i.e. using dual copies
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/14—Error detection or correction of the data by redundancy in operation
    • 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
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671—In-line storage system
    • G06F3/0673—Single storage device

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Human Computer Interaction (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
  • Communication Control (AREA)
  • Color Television Systems (AREA)
DE69021957T 1989-06-30 1990-06-26 Verfahren und Anordnung zur Steuerung von Schattenspeichern. Expired - Lifetime DE69021957T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/374,490 US5239637A (en) 1989-06-30 1989-06-30 Digital data management system for maintaining consistency of data in a shadow set

Publications (2)

Publication Number Publication Date
DE69021957D1 true DE69021957D1 (de) 1995-10-05
DE69021957T2 DE69021957T2 (de) 1996-05-02

Family

ID=23477069

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69021957T Expired - Lifetime DE69021957T2 (de) 1989-06-30 1990-06-26 Verfahren und Anordnung zur Steuerung von Schattenspeichern.

Country Status (7)

Country Link
US (1) US5239637A (de)
EP (1) EP0405925B1 (de)
JP (1) JP2766890B2 (de)
AT (1) ATE127253T1 (de)
AU (1) AU624966B2 (de)
CA (1) CA2020268A1 (de)
DE (1) DE69021957T2 (de)

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Also Published As

Publication number Publication date
EP0405925B1 (de) 1995-08-30
EP0405925A3 (en) 1991-12-11
ATE127253T1 (de) 1995-09-15
DE69021957T2 (de) 1996-05-02
JP2766890B2 (ja) 1998-06-18
CA2020268A1 (en) 1990-12-31
EP0405925A2 (de) 1991-01-02
AU5806690A (en) 1991-01-03
US5239637A (en) 1993-08-24
AU624966B2 (en) 1992-06-25
JPH03135639A (ja) 1991-06-10

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