Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of biasing or erasing
Reexamination Certificate
2006-11-20
2010-02-23
Olson, Jason C (Department: 2627)
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of biasing or erasing
C360S051000, C360S061000
Reexamination Certificate
active
07667915
ABSTRACT:
According to one embodiment, a disk drive is provided which has a head amplifier having a function of, at a data recording time, outputting AC pattern data to a write head prior to the recording of the write data to allow it to be recorded on a write splice section on a disk medium. The write head records an AC signal pattern of a high frequency on the write splice section on the disk medium according to an output timing of a write gate and then write data is recorded with a preamble as a header.
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Japanese Office Action dated Jun. 16, 2009 for Appln. No. 2005-343967.
Kabushiki Kaisha Toshiba
Olson Jason C
Pillsbury Winthrop Shaw & Pittman LLP
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