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:
Dec. 14, 2010
Filed:
Mar. 12, 2008
Jose K. Manoj, Lilburn, GA (US);
Jose K. Manoj, Lilburn, GA (US);
LSI Corporation, Milpitas, CA (US);
Abstract
A method of improving a serial IO operation, where the serial IO operation includes at least one of a read operation of a data block and a write operation of a data block, and the serial IO operation is directed to a logical disk of a computerized data storage system. Only one stripe of data is read from the logical disk into a cache, and it is determined whether the data block for the IO operation is included within the cache. When the data block for the IO operation is included within the cache, then for a read operation, the IO operation is serviced from the cache. For a write operation, the cache is updated with the data block to be written, and only an updated parity block is written to the logical disk. When the data block for the IO operation is not included within the cache, then for a read operation, only one new stripe of data that includes the data block is read from the logical disk into the cache, and the IO operation is serviced from the cache. For a write operation, only one new stripe of data that excludes the data block is read from the logical disk into the cache, the cache is updated with the data block to be written, and only an updated parity block is written to the logical disk.