Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of biasing or erasing
Patent
1996-08-19
1998-11-03
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of biasing or erasing
360 46, 360 55, G11B 503
Patent
active
058317821
ABSTRACT:
Disclosed are a method of and an apparatus for controlling a magnetic disc drive including a magnetic head in which a write head and a read head are separated. The control method comprises: a step of calculating a moving quantity up to a designated target track position in accordance with a write instruction or a read instruction and calculating a moving quantity from the moving quantity up to the target track position and a yaw angle offset quantity in accordance with the read instruction or the write instruction; and a step of locating the magnetic head in the target track position by seek-controlling the rotary type actuator in accordance with the calculated moving quantity. The control apparatus comprises: a first control circuit for indicating a seek to a designated target track in accordance with a write instruction or a read instruction; and a second control circuit for calculating a moving quantity up to a designated target track position in accordance with the write instruction or the read instruction, calculating a moving quantity from the moving quantity up to the target track position and a yaw angle offset quantity in accordance with the read instruction or the write instruction and thus seek-controlling the rotary type actuator in accordance with the calculated moving quantity.
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Ishii Masayoshi
Kohno Keiichi
Kozuka Tamotsu
Nagasaka Yoshiyuki
Takahashi Tsuyoshi
Cullen Larry T.
Fujitsu Limited
Psitos Aristotelis M.
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