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Class Information
Number: 360/78.14
Name: Dynamic magnetic information storage or retrieval > Automatic control of a recorder mechanism > Controlling the head > Track changing > For rotary carrier (e.g., disc) > By recorded servo reference or address signal
Description: Subject matter wherein the head is controlled by a reproduced signal representing the position or address of the transducer head on the record carrier disk.

Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
8711506 Disk drive increasing capacity by adjusting a servo gate during write operations Apr. 29, 2014
8711504 Disk drive with a subset of sectors with reduced write-to-read gap Apr. 29, 2014
8630059 Methods for closed-loop compensation of ultra-high frequency disturbances in hard disk drives and hard disk drives utilizing same Jan. 14, 2014
8625223 Multi-directional self servo-writing for a disk drive Jan. 7, 2014
8531798 Disk drive adjusting servo burst signals to compensate for radial velocity of the head Sep. 10, 2013
8520334 Disk storage device, controller of the same, controlling method performed by the same, and electronic device Aug. 27, 2013
8189286 Disk drive employing velocity insensitive servo burst pattern May. 29, 2012
8107188 Self servo writing disk controller and methods for use therewith Jan. 31, 2012
7933088 Disk drive having a disk of discrete-track media type Apr. 26, 2011
7843662 Servoing on concentric servo sectors of a first disk surface to write a spiral servo track to a second disk surface Nov. 30, 2010
7839600 Disk drive employing data-based basis function expansion for tuning seek servo loop Nov. 23, 2010
7813077 Apparatus, system, and method for detecting a periodic sequence of servo signals Oct. 12, 2010
RE41687 Disk calibration and search method in a cd-rom drive system Sep. 14, 2010
7724467 Storage device, control circuit for storage device, and servo-write-mode identifying method May. 25, 2010
7593180 HDD data read control apparatus, medium, and method Sep. 22, 2009
7580219 Controlling seeks using non-linear switching curves Aug. 25, 2009
7564644 Adaptive disturbance repressing method and apparatus, and disk drive apparatus using the same Jul. 21, 2009
7518819 Disk drive rewriting servo sectors by writing and servoing off of temporary servo data written in data sectors Apr. 14, 2009
7502187 Address mark detection Mar. 10, 2009
7468859 Voice coil motor effective resistance determination Dec. 23, 2008
7466506 Magnetic recording disk drive with head positioning servo control system for disk surfaces with identical servo patterns Dec. 16, 2008
7463445 Method of controlling track seek in HDD and a recording medium therefor Dec. 9, 2008
7375918 Method of self-servo writing in a disk drive using multiple timing windows May. 20, 2008
7307810 Method of compensating for track address discontinuity across servo track writing boundary in hard disk drives Dec. 11, 2007
7286319 Disk drive write control by servo gain Oct. 23, 2007
7283320 Magnetic recording medium including servo and data bands in the magnetic layer Oct. 16, 2007
RE39831 Method and apparatus for providing positional information on a disk Sep. 11, 2007
7265937 Positioning of a head array over a data storage medium Sep. 4, 2007
7212374 Disk drive to characterize misaligned servo wedges May. 1, 2007
7199960 Disk drive with AC exciter for head/disk interface Apr. 3, 2007
7042668 Method and apparatus for generating an index location from a spin motor of a disk drive May. 9, 2006
7019939 Apparatus and method for positioning head at target position on disk Mar. 28, 2006
7016133 Systems for detecting multiple occurrences of a SAM pattern to thereby improve servo-demodulation robustness Mar. 21, 2006
7016132 Magnetic data embedding system Mar. 21, 2006
7012773 Disk device and disk medium, in which a plurality of servo cylinders formed concentrically from the inner diametrical portion to the outer diametrical portion of at least one disk are divided Mar. 14, 2006
7009791 Position detecting method, information recording/reproducing device and information recording medium Mar. 7, 2006
7006312 Methods for preventing channel control values from being corrupted to thereby improve servo-demodulation robustness Feb. 28, 2006
7006311 Systems for preventing channel control values from being corrupted to thereby improve servo-demodulation robustness Feb. 28, 2006
6999259 Master disc and method of manufacturing the same Feb. 14, 2006
6995938 Data recording system with servo pattern having pseudo-noise sequences Feb. 7, 2006
6992855 Methods for limiting channel control values to thereby improve servo-demodulation robustness Jan. 31, 2006
6992856 Systems for limiting channel control values to thereby improve servo-demodulation robustness Jan. 31, 2006
6965966 Disk drive pre-computing seek parameters for a continuation track and a next command to facilitate continuing a read-ahead or aborting the read-ahead Nov. 15, 2005
6963458 Method and apparatus for reducing the servo position error signal non-linearity during self-servo writing irrespective of the head width Nov. 8, 2005
6954318 Magnetic data embedding apparatus having checking function Oct. 11, 2005
6950274 Disk storage apparatus and disk storage apparatus control method Sep. 27, 2005
6950273 Magnetic disk device Sep. 27, 2005
6947243 Method and system for time-shift based rotational vibration sensing in disk drives Sep. 20, 2005
6947233 Disk drive apparatus and method for compensating for error in servo-information-recorded position between heads Sep. 20, 2005
6943981 Methods for improving servo-demodulation robustness Sep. 13, 2005

1 2 3 4 5 6 7

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