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:
May. 19, 1981
Filed:
Dec. 14, 1978
Applicant:
Inventors:
Donald F Johann, Palo Alto, CA (US);
Charles E Mendenhall, Campbell, CA (US);
Assignee:
Sperry Rand Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
364200 ; 360 31 ; 371 21 ;
Abstract
A disk drive control system incorporating an internal microprocessor and internal testing capabilities. The disk drive control system is capable of simulating drive operation without carriage motion so as to test substantially all functional subsystems of the disk drive. The test technique comprises the exercising of subsystems and a diagnosis of operations according to a hierarchy of interdependence of subsystem operation.