WO2002059749A8 - Restoring a mass storage device to a prior state in response to processing information - Google Patents

Restoring a mass storage device to a prior state in response to processing information

Info

Publication number
WO2002059749A8
WO2002059749A8 PCT/US2001/050495 US0150495W WO02059749A8 WO 2002059749 A8 WO2002059749 A8 WO 2002059749A8 US 0150495 W US0150495 W US 0150495W WO 02059749 A8 WO02059749 A8 WO 02059749A8
Authority
WO
WIPO (PCT)
Prior art keywords
data
data blocks
restoring
storage device
response
Prior art date
Application number
PCT/US2001/050495
Other languages
French (fr)
Other versions
WO2002059749A1 (en
Inventor
Richard S Ohran
Original Assignee
Legato Sys Inc
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 Legato Sys Inc filed Critical Legato Sys Inc
Priority to EP01994464A priority Critical patent/EP1344134A4/en
Priority to CA002432794A priority patent/CA2432794A1/en
Priority to JP2002560011A priority patent/JP2004518216A/en
Priority to KR1020037007295A priority patent/KR100608274B1/en
Publication of WO2002059749A1 publication Critical patent/WO2002059749A1/en
Publication of WO2002059749A8 publication Critical patent/WO2002059749A8/en

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
    • 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
    • G06F11/1402—Saving, restoring, recovering or retrying
    • G06F11/1446—Point-in-time backing up or restoration of persistent data
    • 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
    • G06F11/1402—Saving, restoring, recovering or retrying
    • G06F11/1471—Saving, restoring, recovering or retrying involving logging of persistent data for recovery
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2201/00—Indexing scheme relating to error detection, to error correction, and to monitoring
    • G06F2201/835—Timestamp
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99951—File or database maintenance
    • Y10S707/99952—Coherency, e.g. same view to multiple users
    • Y10S707/99953—Recoverability
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99951—File or database maintenance
    • Y10S707/99952—Coherency, e.g. same view to multiple users
    • Y10S707/99955—Archiving or backup

Abstract

Restoring a mass storage device 12, including the corresponding data blocks 20 stored thereon, to a state in which it existed at a prior instant in time to minimize the data loss caused by data blocks 20 becoming corrupt or lost. After a mirrored or backup copy has been made, data blocks 40 that are to be overwritten in response to a write request are stored in a preservation memory 14 prior to being overwritten. The data blocks 40 stored in the preservation memory 14 are time-stamped to designate the chronological order by which the data blocks 40 were overwritten. If data becomes corrupted, the data blocks 40 of the presentation memory 14 are applied to the corrupted data 20 in reverse chronological order until such time that a valid, non-corrupted set of data obtained. In this manner, data more recent than that associated with the full mirrored or backup copy can be reconstructed.
PCT/US2001/050495 2000-12-21 2001-12-21 Restoring a mass storage device to a prior state in response to processing information WO2002059749A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP01994464A EP1344134A4 (en) 2000-12-21 2001-12-21 Restoring a mass storage device to a prior state in response to processing information
CA002432794A CA2432794A1 (en) 2000-12-21 2001-12-21 Restoring a mass storage device to a prior state in response to processing information
JP2002560011A JP2004518216A (en) 2000-12-21 2001-12-21 Restoring a mass storage device to its previous state in response to processing information
KR1020037007295A KR100608274B1 (en) 2000-12-21 2001-12-21 Restoring a mass storage device to a prior state in response to processing information

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US25749900P 2000-12-21 2000-12-21
US60/257,499 2000-12-21
US10/029,189 2001-12-20
US10/029,189 US6871271B2 (en) 2000-12-21 2001-12-20 Incrementally restoring a mass storage device to a prior state

Publications (2)

Publication Number Publication Date
WO2002059749A1 WO2002059749A1 (en) 2002-08-01
WO2002059749A8 true WO2002059749A8 (en) 2003-03-06

Family

ID=26704648

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/050495 WO2002059749A1 (en) 2000-12-21 2001-12-21 Restoring a mass storage device to a prior state in response to processing information

Country Status (7)

Country Link
US (1) US6871271B2 (en)
EP (1) EP1344134A4 (en)
JP (1) JP2004518216A (en)
KR (1) KR100608274B1 (en)
CN (1) CN1230747C (en)
CA (1) CA2432794A1 (en)
WO (1) WO2002059749A1 (en)

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KR20030063401A (en) 2003-07-28
US6871271B2 (en) 2005-03-22
JP2004518216A (en) 2004-06-17
US20020112134A1 (en) 2002-08-15
CA2432794A1 (en) 2002-08-01
KR100608274B1 (en) 2006-08-04
CN1230747C (en) 2005-12-07
EP1344134A4 (en) 2008-04-02
WO2002059749A1 (en) 2002-08-01
CN1483164A (en) 2004-03-17
EP1344134A1 (en) 2003-09-17

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