Disk drive using off-track margin to obtain optimal performance

Details Disk drive using off-track margin to obtain optimal performance Disk drive using off-track margin to obtain optimal performance

1996-10-23

1999-11-30

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

360 7702, 360 53, 360 46, 360 67, 360 68, 360 65, G11B 2736

Patent

active

059953055

ABSTRACT:
Adaptive channel optimization in a disk drive is achieved by selecting a track of the recording medium and then writing a first data pattern to opposite sides of the selected track. The first data pattern is written a certain percentage off-track in relation to the centerline of the selected track. A second data pattern is then written directly on the selected data track and the off-track margin is determined as a function of how far the recording head can be positioned away from the center of the selected track during reading of the second data pattern while meeting a specified error rate. The off-track margin test is repeated iteratively using a combination of channel variable settings in order to find a set of variable settings which provides an optimal performance criteria for the drive.

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