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:
Sep. 13, 2005
Filed:
Jul. 11, 2002
Koji Yoneyama, Kawasaki, JP;
Yuichi Hirao, Tokyo, JP;
Shigeru Hatakeyama, Kawasaki, JP;
Aaron Olbrich, Morgan Hill, CA (US);
Douglas Prins, Laguna Hills, CA (US);
Koji Yoneyama, Kawasaki, JP;
Yuichi Hirao, Tokyo, JP;
Shigeru Hatakeyama, Kawasaki, JP;
Aaron Olbrich, Morgan Hill, CA (US);
Douglas Prins, Laguna Hills, CA (US);
Fujitsu Limited, Kawasaki, JP;
Abstract
Methods for controlling and storing data in a cache buffer in a storage apparatus having a nonvolatile memory medium are disclosed. Memory cells are logically divided into a plurality of pages. An open status is registered in a counter for each page that has at least some (and usually all) memory cells available to store new data. A full status is registered in the counter for each page that does not have memory cells that are available to store new data. New data is stored in pages having the open status in the counter. The pages can be weighted according to the read command rate and prioritized for reading and writing purposes.