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:
Nov. 08, 2016
Filed:
Oct. 17, 2012
Western Digital Technologies, Inc., Irvine, CA (US);
Skyera, Llc, San Jose, CA (US);
Andrew J. Tomlin, San Jose, CA (US);
Rodney N. Mullendore, San Jose, CA (US);
Justin Jones, Burlingame, CA (US);
Western Digital Technologies, Inc., Irvine, CA (US);
Skyera, LLC, San Jose, CA (US);
Abstract
A data storage device may comprise non-volatile memory devices, each configured to store a plurality of physical pages, a controller and a first volatile memory configured to store a logical-to-physical address translation map that enables the controller to determine a physical location of logical pages. The controller may maintain, in the memory devices, a plurality of journals defining physical-to-logical page correspondences, each entry of which associating one or more physical pages to a logical page. Garbage collection may be carried out by reading entries of the journals; determining a validity of each logical page referenced by the read entries through a comparison with a corresponding entry in the map, the logical pages referenced by the read entries being stored in first physical pages; writing logical pages determined to be valid to second physical pages and updating the map accordingly; and designating at least the first physical pages as free space.