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:
Oct. 21, 2008
Filed:
Apr. 30, 2003
Travis E. Ell, Foothill Ranch, CA (US);
Hanan Kupferman, Diamond Bar, CA (US);
Hoa V. Le, Irvine, CA (US);
Jonathan V. Nguyen, Laguna Niguel, CA (US);
Saied Tamaddon-dallal, Foothill Ranch, CA (US);
Virat Thantrakul, Laguna Niguel, CA (US);
Teik EE Yeo, Trabuco Canyon, CA (US);
Travis E. Ell, Foothill Ranch, CA (US);
Hanan Kupferman, Diamond Bar, CA (US);
Hoa V. Le, Irvine, CA (US);
Jonathan V. Nguyen, Laguna Niguel, CA (US);
Saied Tamaddon-Dallal, Foothill Ranch, CA (US);
Virat Thantrakul, Laguna Niguel, CA (US);
Teik Ee Yeo, Trabuco Canyon, CA (US);
Western Digital Technologies, Inc., Lake Forest, CA (US);
Abstract
Disclosed is a disk drive having a disk, a masked read-only memory (ROM) device, a reprogrammable nonvolatile memory device, and a microprocessor for executing program code. The disk has a magnetic data storage surface with embedded servo wedges for defining data storage tracks including reserve tracks. The masked ROM device stores program code for implementing a spindle motor controller, program code for implementing a portion of a servo controller for track following along a data storage track, and program code for implementing a portion of a disk controller for controlling writing disk data to and reading disk data from the reserve tracks. The reprogrammable nonvolatile memory device stores data parameters relating to the disk drive's configuration. The reserve tracks store program code for implementing a cache control system for controlling caching of disk data in a cache memory.