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:
Mar. 02, 2004
Filed:
Nov. 27, 2000
Applicant:
Inventors:
Donald Ray Gillis, San Jose, CA (US);
Bernd Lamberts, Cupertino, CA (US);
Kris Victor Schouterden, Los Gatos, CA (US);
Assignee:
Hitachi Global Storages Technologies Nethlands B.V., Amsterdam, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 2/102 ; G11B 1/902 ; G11B 2/736 ;
U.S. Cl.
CPC ...
G11B 2/102 ; G11B 1/902 ; G11B 2/736 ;
Abstract
A disk drive controller controls a vacuum pump to establish a vacuum within a disk drive housing to conserve power while ensuring that the head of the drive does not crash into the disk. The controller compares actual spindle power to a predetermined maximum power threshold and actual fly height to a calibration fly height to control the pump. The calibration values are derived by comparing no-load and loaded values for a parameter, e.g., error rate, disk temperature, and so on.