Magnetic recording apparatus

Details Magnetic recording apparatus Magnetic recording apparatus

2007-03-15

2009-02-10

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S077070

Reexamination Certificate

active

07489470

ABSTRACT:
Embodiments of the present invention provide a magnetic recording apparatus capable of generating RRO compensation information that can expand the disturbance frequency range in which to compensate for RRO. Embodiments of the present invention describe a magnetic recording apparatus that uses a plurality of repetitive control systems to detect repeatable runout during the rotation of a magnetic recording medium for a frequency characteristic of each of the repetitive control systems. The magnetic recording apparatus further generates compensation information to compensate for each of the detected repeatable runout. The magnetic recording apparatus still further writes the compensation information generated for each of the repetitive control systems to a servo signal, thus suppressing and controlling the repeatable runout.

REFERENCES:
patent: 6549349 (2003-04-01), Sri-Jayantha et al.
patent: 6950268 (2005-09-01), Inoue et al.
patent: 7054094 (2006-05-01), Zhang et al.
patent: 7085094 (2006-08-01), Heimbaugh et al.
patent: 2001-126421 (2001-05-01), None

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