Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Reexamination Certificate
2006-09-19
2006-09-19
Young, Wayne (Department: 2651)
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
C360S053000, C360S025000, C360S069000, C360S048000
Reexamination Certificate
active
07110197
ABSTRACT:
A method for determining a type of a head in a hard disc drive, the head being a normal head, a weak head, or an ATE (Adjacent Track Erasure) head, and a method for adjusting a write parameter using the head type determining method. The head type determining method includes writing data via the head under multiple tracks per inch (TPI) conditions, in which TPIs are equal to a reference TPI, and wider and narrower than the reference TPI by a respective first and second predetermined ratios, and reproducing the written data, to detect a bit error rate under each TPI condition, and comparing the bit error rate under each condition to the bit error rate of the reference TPI, to determine a type of a head.
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Korean Office Action for Application No. 10-2003-0070035 dated Oct. 31, 2005.
Mercedes Dismery
Staas & Halsey , LLP
Young Wayne
LandOfFree
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