Method of determining side track erasure in a disk drive

Details Method of determining side track erasure in a disk drive Method of determining side track erasure in a disk drive

2007-01-30

2007-01-30

Young, Wayne (Department: 2627)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

C360S066000

Reexamination Certificate

active

10125657

ABSTRACT:
A method of determining side track erasure in a disk drive having a disk and a transducer. A target track and one or more side tracks proximate to the target track on the disk are selected, and recording parameters for recording signals on the target track and each side track with the transducer are selected. Thereafter, signals are recorded on each side track and then signals are recorded on the target track multiple times. A reduction in the integrity of the recorded signals on each side track due to recording signals on the target track multiple times is detected, and the detected reduction in the integrity of the recorded signals on each side track represents the amount of the erasure of the recorded signals on the side track. Recording parameters are changed based on the signal integrity reduction to minimize side track erasure.

REFERENCES:
patent: 4821125 (1989-04-01), Christensen et al.
patent: 6476992 (2002-11-01), Shimatani
patent: 6791780 (2004-09-01), Lee et al.

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