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. 04, 1995
Filed:
Dec. 17, 1992
Vern J Legvold, Tucson, AZ (US);
Steven C Cowley, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Improved system for destaging data from a nonvolatile memory. The system is operative after a failure of an associated first cache memory for which the nonvolatile memory stores backup data. The invention is adapted to scan the nonvolatile memory to identify control data stored therein. Next a directory structure is built from control information in the nonvolatile memory which is used to provide rapid access to data stored therein. In a particular implementation, the directory structure is stored as a plurality of pointers in data storage space allocated in a second cache. Data may then be destaged from the nonvolatile memory in a more efficient manner by which records from a particular track are grouped together.