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:
Apr. 10, 2012
Filed:
Mar. 30, 2009
Matt Barsotti, Santa Maria, CA (US);
Turguy Goker, Solana Beach, CA (US);
Carl Hoerger, Boise, ID (US);
Jeff Mcallister, Boise, ID (US);
Ming-chih Weng, Los Angeles, CA (US);
Matt Barsotti, Santa Maria, CA (US);
Turguy Goker, Solana Beach, CA (US);
Carl Hoerger, Boise, ID (US);
Jeff McAllister, Boise, ID (US);
Ming-Chih Weng, Los Angeles, CA (US);
Quantum Corporation, San Jose, CA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
In a method of electronically measuring reader/writer offset in a tape drive head, a plurality of sequentially adjacent data tracks are written on a tape with a write head. Error rate information is measured while reading a data track of the plurality of sequentially adjacent data tracks with a read head of the tape drive. A bathtub shaped curve is built from a set of the error rate information which is accumulated by reading the data track at a plurality of offsets of the read head relative to the data track. Offset of the read head relative to the write head is measured by determining an offset of the read head which correlates to a magnetic center of the data track as represented by a center point between edges of the bathtub shaped curve.