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:
Jul. 25, 2006
Filed:
Dec. 24, 2002
Disk drive executing a preemptive multitasking operating system comprising tasks of varying priority
Gregory B. Thelin, Garden Grove, CA (US);
Michael S. Rothberg, Foothill Ranch, CA (US);
Eric L. Severtson, Trabuco Canyon, CA (US);
John Edward Lauber, Pleasanton, CA (US);
Horia Cristian Simionescu, Foster City, CA (US);
Gregory B. Thelin, Garden Grove, CA (US);
Michael S. Rothberg, Foothill Ranch, CA (US);
Eric L. Severtson, Trabuco Canyon, CA (US);
John Edward Lauber, Pleasanton, CA (US);
Horia Cristian Simionescu, Foster City, CA (US);
Western Digital Technologies, Inc., Lake Forest, CA (US);
Abstract
A disk drive is disclosed for executing a preemptive multitasking operating system comprising tasks of varying priority, including a disk task for processing disk commands by initiating seek operations and configuring parameters of a read/write channel, a host task for initiating disk commands in response to host commands received from a host computer, a background task for initiating disk commands to perform background operations including a defect scan of the disk, and an execution task for arbitrating the disk commands generated by the host task and the background task and for transmitting the arbitrated disk commands to the disk task.