Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Reexamination Certificate
2011-01-18
2011-01-18
Wong, K. (Department: 2627)
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
C360S078090
Reexamination Certificate
active
07872822
ABSTRACT:
A disk drive is disclosed including a first disk surface comprising a plurality of data tracks, wherein each data track comprises a first plurality of data sectors, and a second disk surface comprising a plurality of data tracks, wherein each data track comprises a second plurality of data sectors. A first head is actuated over the first disk surface and a second head is actuated over the second disk surface. The first and second data sectors are accessed in a serpentine access pattern, wherein a plurality of refresh zones are defined relative to the serpentine access pattern. When a write command is received from a host, data is written to at least one of the refresh zones, and a refresh monitor associated with the refresh zone is updated.
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Western Digital Technologies Inc.
Wong K.
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