WO2002084489A3 - An apparatus and method for accessing a mass storage device in a fault-tolerant server - Google Patents

An apparatus and method for accessing a mass storage device in a fault-tolerant server Download PDF

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Publication number
WO2002084489A3
WO2002084489A3 PCT/US2002/011340 US0211340W WO02084489A3 WO 2002084489 A3 WO2002084489 A3 WO 2002084489A3 US 0211340 W US0211340 W US 0211340W WO 02084489 A3 WO02084489 A3 WO 02084489A3
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WO
WIPO (PCT)
Prior art keywords
mass storage
storage device
fault
tolerant server
accessing
Prior art date
Application number
PCT/US2002/011340
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French (fr)
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WO2002084489A2 (en
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Stratus Technologies Bermuda Ltd
Stratus Technologies
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Publication date
Application filed by Stratus Technologies Bermuda Ltd, Stratus Technologies filed Critical Stratus Technologies Bermuda Ltd
Priority to AU2002250563A priority Critical patent/AU2002250563A1/en
Publication of WO2002084489A2 publication Critical patent/WO2002084489A2/en
Publication of WO2002084489A3 publication Critical patent/WO2002084489A3/en

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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
    • G06F11/20—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
    • G06F11/2002—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 interconnections or communication control functionality are redundant
    • G06F11/2007—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 interconnections or communication control functionality are redundant using redundant communication media
    • 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
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0706—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment
    • G06F11/0727—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment in a storage system, e.g. in a DASD or network based storage system
    • 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
    • G06F11/1629—Error detection by comparing the output of redundant processing systems
    • G06F11/165—Error detection by comparing the output of redundant processing systems with continued operation after detection of the error
    • 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
    • G06F11/2002—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 interconnections or communication control functionality are redundant
    • G06F11/2005—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 interconnections or communication control functionality are redundant using redundant communication controllers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
    • 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
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/079—Root cause analysis, i.e. error or fault diagnosis
    • 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
    • G06F11/1629—Error detection by comparing the output of redundant processing systems
    • G06F11/1641—Error detection by comparing the output of redundant processing systems where the comparison is not performed by the redundant processing components
    • 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
    • G06F11/18—Error detection or correction of the data by redundancy in hardware using passive fault-masking of the redundant circuits
    • G06F11/183—Error detection or correction of the data by redundancy in hardware using passive fault-masking of the redundant circuits by voting, the voting not being performed by the redundant components
    • G06F11/184—Error detection or correction of the data by redundancy in hardware using passive fault-masking of the redundant circuits by voting, the voting not being performed by the redundant components where the redundant components implement processing functionality

Abstract

An apparatus and method for accessing a first local mass storage device or a second local mass storage device in a fault-tolerant server. In one embodiment, the fault-tolerant server establishes communication between a first computing element and a first local mass storage device. The fault-tolerant server also establishes communications between a second computing element and a second local mass storage device. In one embodiment, the first computing element and the second computing element issue substantially similar instruction streams to one of the local mass storage devices.
PCT/US2002/011340 2001-04-11 2002-04-10 An apparatus and method for accessing a mass storage device in a fault-tolerant server WO2002084489A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002250563A AU2002250563A1 (en) 2001-04-11 2002-04-10 An apparatus and method for accessing a mass storage device in a fault-tolerant server

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/832,467 US6971043B2 (en) 2001-04-11 2001-04-11 Apparatus and method for accessing a mass storage device in a fault-tolerant server
US09/832,467 2001-04-11

Publications (2)

Publication Number Publication Date
WO2002084489A2 WO2002084489A2 (en) 2002-10-24
WO2002084489A3 true WO2002084489A3 (en) 2003-12-11

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PCT/US2002/011340 WO2002084489A2 (en) 2001-04-11 2002-04-10 An apparatus and method for accessing a mass storage device in a fault-tolerant server

Country Status (3)

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US (1) US6971043B2 (en)
AU (1) AU2002250563A1 (en)
WO (1) WO2002084489A2 (en)

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AU2002250563A1 (en) 2002-10-28
WO2002084489A2 (en) 2002-10-24
US20020152419A1 (en) 2002-10-17
US6971043B2 (en) 2005-11-29

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