ALEXANDRIA, Va., July 15 -- United States Patent no. 12,664,049, issued on June 23, was assigned to Western Digital Technologies Inc. (San Jose, Calif.).
"Defective sector management for magnetic data storage disks" was invented by Ryoji Fukuhisa (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A Data Storage Device (DSD) includes at least one disk and at least one memory storing an active Primary defect List (P-List) indicating defective sectors identified during formatting, a Grown defect List (G-List) indicating defective sectors identified after formatting, and an inactive P-List including entries for accepting entries from the G-List. Entries of the G-List are merged into the P-List by successively...