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:
Aug. 10, 1999
Filed:
Jun. 25, 1997
Daniel John Sokolov, Rochester, MN (US);
Western Digital Corporation, Irvine, CA (US);
Abstract
A hard disk drive has an intelligent interface for communicating with a host, a magnetic disk, disk side programs and host side programs, and a cache. The cache is divisible into a number of segments, and the number of segments may be varied. The cache employs a cache control structure including a cache entry table, and the hard disk drive receives commands from the host in a queue. The method comprises the steps of. (a) receiving a first command and a second command from the host; (b) determining a scan first state; (c) determining if there are any commands in the queue; (d) waiting for a first command to complete and performing a seek if there are no commands in the queue and the scan first state is false; (e) performing a scan of the cache entry table to assign the second command to a segment; and () checking if a seek is needed for the second command and if a seek is needed for the second command performing a seek for the second command after the first command has completed.