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:
Feb. 12, 2013
Filed:
Mar. 23, 2009
Carl E. Bonke, Coto De Caza, CA (US);
Carl E. Bonke, Coto De Caza, CA (US);
Western Digital Technologies, Inc., Irvine, CA (US);
Abstract
A disk drive is disclosed comprising a disk and a head actuated over the disk. The disk comprises a plurality of tracks, wherein each track comprises a plurality of data sectors including a parity sector, the parity sector comprising at least a Pparity codeword and a Pparity codeword. A plurality of data sectors are read from the disk (including the parity sector) to generate a plurality of data codewords CW-CWn. The data sectors are decoded using an error correction code (ECC) decoder. When a single data codeword in CW-CWn is unrecoverable using the ECC decoder, the single data codeword is recovered using the Pparity codeword. When two data codewords in CW-CWn are unrecoverable using the ECC decoder, the two data codewords are recovered using the Pand Pparity codewords.