The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 03, 2002
Filed:
May. 21, 1999
Christopher L. Canestaro, Austin, TX (US);
John Steven Langford, Austin, TX (US);
Rick Allen Hamilton, II, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method of verifying the integrity of a file transferred as a plurality of sectors. During a first pass transfer of a sectored file, first pass sector CRC codes are generated for each sector and stored in system memory. During a second pass transfer, second pass CRC codes are generated for each sector. The second pass CRC codes are compared to the first pass CRC codes for corresponding sectors. If the second pass CRC code matches the first pass CRC code, the sector is committed to the destination medium. The CRC sector values for an initial sector of the file are preferably generated from a predefined seed. Each successive CRC sector value is then preferably generated from the preceding sector's CRC code such that the sector CRC code of the last sector comprises a final CRC code of the file.