Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Reexamination Certificate
2007-06-05
2007-06-05
Wellington, Andrea (Department: 2627)
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
C360S046000, C360S053000, C360S048000, C360S077060
Reexamination Certificate
active
10985139
ABSTRACT:
A method for identifying victim tracks distanced from an aggressor track in a hard disk drive that are deleteriously affected by long range fringe effects causing adjacent track interference (ATI) when the aggressor track is written includes writing first and second frequencies to candidate victim tracks, and writing a third frequency to the aggressor track. The amplitudes of the remaining frequencies are read and output and if desired normalized as an indication of ATI to distant victim tracks. Or, data can be written and on-track error rates (OTER) used to determine ATI.
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Hitachi Global Storage Technologies - Netherlands B.V.
Mercedes Dismery
Rogitz John L.
Wellington Andrea
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