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:
Apr. 12, 2005
Filed:
Jul. 25, 2003
Ralph H. Castro, Lake Forest, CA (US);
Virgil V. Wilkins, Perris, CA (US);
Tsun Y. NG, Orange, CA (US);
Ralph H. Castro, Lake Forest, CA (US);
Virgil V. Wilkins, Perris, CA (US);
Tsun Y. Ng, Orange, CA (US);
Western Digital Technologies, Inc., Lake Forest, CA (US);
Abstract
The present invention relates to disk drive having a cache control system that generates scan results that permit response to a host command using existing cached data having a logical block address (LBA) range that overlaps a host command LBA range. The cache control system forms variable length segments of memory clusters in a cache memory for caching disk data in contiguous LBA ranges. The cached LBA ranges are scanned for segments having LBA ranges overlapping with an LBA range of a host command. The cache control system is effective in exploiting any existing overlapping cache data.