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:
Apr. 07, 2015
Filed:
Jun. 21, 2012
Jonathan D. Coker, Rochester, MN (US);
Jeffrey L. Furlong, Irvine, CA (US);
David R. Hall, Rochester, MN (US);
David J. Stanek, Rochester, MN (US);
Jonathan D. Coker, Rochester, MN (US);
Jeffrey L. Furlong, Irvine, CA (US);
David R. Hall, Rochester, MN (US);
David J. Stanek, Rochester, MN (US);
HGST Netherlands B.V., Amsterdam, NL;
Abstract
A method of correcting repeatable run out (RRO) errors for a HDD in which RRO data is instead stored in consolidated form within the reserved area of the disk, instead of storing RRO data in the servo patterns for each HDD track or sector. RRO data is preferably stored in the reserved area of a hard disk drive in compressed form. The compressed RRO data is subsequently read into DRAM in compressed form and then decompressed for use. Predictive techniques determine what compressed RRO data is needed for upcoming read/write operations.