Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Reexamination Certificate
2006-07-18
2006-07-18
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
C360S060000, C360S075000, C360S053000
Reexamination Certificate
active
07079337
ABSTRACT:
Embodiments of the present invention relate to detecting a flying high state in which a head/slider is flying stably at a high flying position, and then to restore the head/slider to a normal flying position. The detection is made by detecting a read output of a head using a head output detector, and by detecting a gain of a VGA using a gain detector. A control unit uses a value measured in a normal flying state as a reference value to compare a detected value with the reference value. If the compared values differ from each other, the control unit judges that a flying high state has occurred. The control unit, therefore, moves the head/slider to the vicinity of the innermost circumferential track of the disk, or unloads the head/slider.
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Okada Kenji
Sasaki Chikako
Tokizono Akira
Davidson Dan I
Hitachi Global Storage Technologies - Netherlands B.V.
Hudspeth David
Townsend and Townsend / and Crew LLP
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