Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2007-02-14
2008-11-25
Nguyen, Hoa T. (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S073030
Reexamination Certificate
active
07457073
ABSTRACT:
Embodiments in accordance with the present invention allow a magnetic disk drive to achieve noise reduction and low power consumption through rotation at a low speed and a high transfer rate through rotation at a high speed while allowing reliability to be maintained and achieving an improved recording density. An embodiment of a magnetic disk drive in accordance with the present invention includes, a magnetic disk medium driven at a plurality of rotational speeds, a magnetic head for recording and reproducing data in and from the magnetic disk medium, a heater for controlling a flying height of the magnetic head, and a control unit for controlling the current to the heater, and in that the control unit controls the current to the heater. The control unit controls the current to the heater according to the plurality of rotational speeds.
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Hiratsuka Yukie
Kurita Masayuki
Tanaka Hideaki
Tokuyama Mikio
Duncan Patrick
Habermehl James L
Hitachi Global Storage Technologies - Netherlands B.V.
Nguyen Hoa T.
Townsend and Townsend / and Crew LLP
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