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Class Information
Number: 360/77.02
Name: Dynamic magnetic information storage or retrieval > Automatic control of a recorder mechanism > Controlling the head > Track centering > Rotary carrier
Description: Subject matter which controls a transducer centering position relative to a circular revolving medium.










Sub-classes under this class:

Class Number Class Name Patents
360/77.04 By memory storage of repeatable error or correction 625
360/77.03 By nonmagnetic sensing (e.g., optical, capacitive) 253
360/77.05 By servo signal component from carrier surface separate from information signal bearing surface 199
360/77.07 By tracking signal recorded on or immediately beneath surface 234
360/77.06 Reproduced data signal used for tracking 198


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14

Patent Number Title Of Patent Date Issued
7474485 Magnetic disk medium, magnetic disk drive, and method for detecting rotational position of magnetic disk medium Jan. 6, 2009
7474494 Magnetic disk device with positioning control Jan. 6, 2009
7466101 Head position control method, head position control device, and disk device Dec. 16, 2008
7460330 Settling judgment method for positioning control device and positioning control device Dec. 2, 2008
7443630 Apparatus, system, and method for writing magnetically encoded data to discrete lands Oct. 28, 2008
7443626 Patterned disk medium for vertical magnetic recording, and magnetic disk drive with the medium Oct. 28, 2008
7423833 Servo loop employing correction vector from a secondary disturbance sensor to minimize correlation between servo loop error and disturbance sensor output Sep. 9, 2008
7420764 Servo controller method and apparatus for high tracks per inch hard disk drives using a delay accomodating state estimator Sep. 2, 2008
7417821 Information recording apparatus Aug. 26, 2008
7405899 Method for determining read/write head position based on phase detection of a servo pattern Jul. 29, 2008
7405898 System and method for generating a position error signal (PES) reference curve in a data storage device Jul. 29, 2008
7400467 Methods and apparatus for managing write inhibit in response to a predictive metric Jul. 15, 2008
7400468 Vibration detector for hard disk drives Jul. 15, 2008
7397627 Method of detecting position of head for recording medium Jul. 8, 2008
7394613 Control device, disk device, and seek orbit generation method Jul. 1, 2008
7394607 Disk drive with position detection Jul. 1, 2008
7375915 Disk drive that varies the power to a slider mover during transitions between drive operations May. 20, 2008
7369349 Data storage device with heater, and control method therefor involving different control modes May. 6, 2008
7369351 Magnetic disk drive and read/write method to reduce read error rate May. 6, 2008
7365932 Disk drive comprising an optical sensor for vibration mode compensation Apr. 29, 2008
7362536 Disk drive that compensates for phase incoherence between radially adjacent servo tracks and methods thereof Apr. 22, 2008
7342737 Off track write protection using filtered position error signal Mar. 11, 2008
7333285 Method of and apparatus for detecting actuator vibration in hard disc drive, and hard disc drive write control method of avoiding effect due to read/write head vibration Feb. 19, 2008
7333287 Head position control method and disk apparatus Feb. 19, 2008
7330321 Reference magnetic signal recording device and method of manufacturing the same Feb. 12, 2008
7330330 Systems for self-servowriting in multiple portions with multiple passes per servowriting step Feb. 12, 2008
7319570 Random vibration and shock compensator using a disturbance observer Jan. 15, 2008
7315433 Non-repeatable run out compensating apparatus and method and disc drive using the same Jan. 1, 2008
7301720 Method of determining and applying adaptive track zero position and disc drive using the same Nov. 27, 2007
7292404 Signal reproducing method and storage apparatus Nov. 6, 2007
7292403 Low frequency disturbance compensation control device and disk drive using the same Nov. 6, 2007
7289288 Disk drive having hybrid spindle speed control and related method Oct. 30, 2007
7280308 Motor drive semiconductor integrated circuit and magnetic disk storage apparatus Oct. 9, 2007
7277250 Track zero determination method used in data storage system and disk drive using the same Oct. 2, 2007
7277503 Apparatus and method for synchronizing sampling frequency and carrier frequency in a multi-carrier communication system Oct. 2, 2007
7271977 Method to compensate for microjog error induced by localized track squeeze Sep. 18, 2007
7271974 Method of self servo write with low density gas Sep. 18, 2007
7268968 Vibration suppression for servo control Sep. 11, 2007
7265931 Apparatus to reject disk drive disturbance Sep. 4, 2007
7262931 Disk drive using magnetic disk medium of discrete track recording Aug. 28, 2007
7253987 Disturbance signal reduction in servo systems Aug. 7, 2007
7245447 Magnetic read/write apparatus having a write inhibit slice setting circuit Jul. 17, 2007
7245451 Methods using extended servo patterns with variable multi-pass servowriting and self-servowriting Jul. 17, 2007
7242550 Magnetic disk apparatus suppressing adjacent track influence Jul. 10, 2007
7236321 Method for preventing data loss in a hard disk drive by projecting reduction in helium concentration using insitu non-repeatable runout Jun. 26, 2007
7218472 Magnetic recording and reproducing apparatus and control method for the same May. 15, 2007
7215494 System and method for performing adaptive read retry operations in a data storage device May. 8, 2007
7212364 Servo writing a disk drive by synchronizing a servo write clock in response to a sync mark reliability metric May. 1, 2007
7212371 Storage device and its control method and manufacturing method May. 1, 2007
7206160 Method and apparatus of micro-actuator control of the flying height of a read/write head in a hard disk drive Apr. 17, 2007

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