Off-track retry method in hard disk drive

Details Off-track retry method in hard disk drive Off-track retry method in hard disk drive

2006-08-08

2006-08-08

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

C360S060000, C360S077040, C360S077060, C360S031000, C360S078040, C360S077020

Reexamination Certificate

active

07088535

ABSTRACT:
An off-track retry method for recovering data incorrectly read due to a read error caused by an off-track error in a disk drive. The off-track retry method includes extracting read gain characteristics while varying an off-track amount, determining an off-track amount, i.e., off-track direction and degree, based upon the read gain characteristics, reading data using the determined off-track amount, and determining whether the read data is normal and determining whether the data incorrectly read due to the read error has been recovered based upon the result.

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