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:
Aug. 12, 2014
Filed:
May. 12, 2010
Po-jen Hsueh, Kaohsiung, TW;
Richard A. Mataya, Rancho Santa Margarita, CA (US);
Mark Moshayedi, Newport Coast, CA (US);
Po-Jen Hsueh, Kaohsiung, TW;
Richard A. Mataya, Rancho Santa Margarita, CA (US);
Mark Moshayedi, Newport Coast, CA (US);
STEC, Inc., Santa Ana, CA (US);
Abstract
A flash storage device includes a first memory, a flash memory comprising a plurality of physical blocks, each of the plurality of physical blocks comprising a plurality of physical pages, and a controller. The controller is configured to store, in the first memory, copies of data read from the flash memory, map a logical address in a read request received from a host system to a virtual unit address and a virtual page address, and check a virtual unit cache tag table stored in the first memory based on the virtual unit address. If a hit is found in the virtual unit cache tag table, a virtual page cache tag sub-table stored in the first memory is checked based on the virtual page address, wherein the virtual page cache tag sub-table is associated with the virtual unit address. If a hit is found in the virtual page cache tag sub-table, data stored in the first memory mapped to the hit in the virtual page cache tag sub-table is read in response to the read request received from the host system.