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:
May. 23, 2000
Filed:
Sep. 04, 1997
Rodney A DeKoning, Wichita, KS (US);
Donald R Humlicek, Wichita, KS (US);
Max L Johnson, Wichita, KS (US);
Curtis W Rink, Wichita, KS (US);
LSI Logic Corporation, Milpitas, CA (US);
Abstract
The invention relates to a method and apparatus for maintaining data/parity consistency in a RAID data storage system. The invention utilizes reserved disk storage space in the RAID array to log data necessary to restore data/parity consistency should an interruption event, such as a power failure, corrupt the data stored in a particular redundancy group. In one embodiment, the invention logs new data and new parity information to the reserved disk storage space before the new data and new parity information are written to the appropriate locations in the associated redundancy group. In this way, if an interruption event occurs when either the new data or the new parity information has already been written to the redundancy group but the other has not, the corresponding data and parity information stored in the reserved disk storage space can be used to restore data/parity consistency after the event has ended.