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:
Nov. 12, 2002
Filed:
Jun. 07, 2001
Rodney A. DeKoning, Augusta, KS (US);
Thomas L. Langford, II, Wichita, KS (US);
LSI Logic Corporation, Milpitas, CA (US);
Abstract
Data consistency is verified between geographically separated and connected active and mirroring data processing systems by creating metadata which describes user data, such as a cyclical redundancy code (CRC), and time stamp information which describes the time at which user data was first stored on the active system. The metadata and the time stamp information sent from the active system is compared at the mirroring system with the time stamp information and metadata read from the mirroring system. Upon detecting a discrepancy when comparing the metadata from the active and mirroring systems, the user data from the active or mirroring system which is less current temporally, as determined by the time stamp information, is replaced by the user data from the other one of the active or mirroring systems having the more current temporal time stamp information.