Methods and systems for recovering data from corrupted archives

Details Methods and systems for recovering data from corrupted archives Methods and systems for recovering data from corrupted archives

2005-07-15

2009-10-13

Lu, Kuen S (Department: 2156)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000

Reexamination Certificate

active

07603390

ABSTRACT:
Systems and methods are disclosed for recovering data. The disclosed systems and methods may include locating a central directory in a file archive. Furthermore, the disclosed systems and methods may include determining that a local header located in the file archive is authentic if at least one of a plurality of records in the local header match at least one of a corresponding record in the central directory. The local header may be located in the file archive using an offset specified in the central directory. Moreover, the disclosed systems and methods may include determining that the local header is valid and recovering item data associated with the local header if the local header is authentic and valid.

REFERENCES:
patent: 6912645 (2005-06-01), Dorward et al.
patent: 7111322 (2006-09-01), Slick et al.
Ford, Bryan, “VXA: A Virtual Architecture for Durable Compressed Archives,” FAST'05: 4thUSENIX Conference on File and Storage Technologies, 2005.

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