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:
Jun. 20, 2006
Filed:
Aug. 08, 2003
Applicants:
Paul Marion Green, Hollister, CA (US);
Garth Wade Helf, San Jose, CA (US);
Inventors:
Paul Marion Green, Hollister, CA (US);
Garth Wade Helf, San Jose, CA (US);
Assignee:
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 33/12 (2006.01); G11B 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for identifying a problem with a magnetic disk, comprising testing both sides of a disk for read errors using a pair of heads, flipping the disk 180 degrees, again testing both sides of the disk for read errors using the same heads, determining whether one side of the disk has more errors than the other side both before and after the flip, and determining that the disk is the cause of the read errors if the same side of the disk still has more errors than the other side after the flip.