Error detection and recovery of database files

Details Error detection and recovery of database files Error detection and recovery of database files

1996-09-26

1999-02-09

Black, Thomas G.

Data processing: database and file management or data structures

Database design

Data structure types

707204, 707 10, G06F 1730

Patent

active

058707620

ABSTRACT:
An improved method for encoding, error detection and restoration of corrupted database files comprises generating a unique record code in each record of a record file, and when a memo file is present, generating a unique memo code in each memo of the memo file for identifying the correlation of the memo to one particular record field and one uniquely identified record. Error detection is achieved by verifying locations of record codes in record files; memo codes in memo files; and the correlation between memo codes in memo file and the record codes in record file. Integrity of record file is restored by searching for record codes and rewriting the located records in correct file structure positions. Memo file integrity is restored by searching for memo codes and rewriting memos in correct file structure positions, and memo pointers are corrected by using the method's correlation between record codes and memo codes to locate correct memos in the memo file.

REFERENCES:
patent: 5280611 (1994-01-01), Chandrasekaran et al.
patent: 5404502 (1995-04-01), Warner et al.
patent: 5404508 (1995-04-01), Konrad et al.
patent: 5561793 (1996-10-01), Bennett et al.
http://w.w.w. symantec. com
u/fs Symantec Norton Ultilities--File Fix (page 2) (1996).
http://www.usa.net/hall (web page reprint) Paul Heiser-dSalvage (1996).
http://www.usa.net/hall/foxfix/default-html (web page reprint) Xitechnics-Fox (1996).

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