197881 ⎘
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor; Disposition or mounting of heads relative to record carriers with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks Servo formatting
Methods for limiting channel control values to thereby improve servo-demodulation robustness
#302Magnetic disk apparatus and servo pattern recording method therefor
#303Magnetic disk apparatus, method for determining data track pitch, and self-servo write method
#304Base member of disk drive having clock window to write servo track information
#305Servo pattern writing method and magnetic disk drive for carrying out the same
#306Head control method and recording apparatus
#307Master information carrier for magnetic transfer and magnetic transfer method
#308Information writing device
#309Servo-track writer
#310Disk drive support assembly, clamp assembly and disk drive carrier
#311Methods for searching for SAM patterns at multiple nominal frequencies
#312Servo demodulator systems including multiple servo demodulators
#313Optical rotational position information detecting apparatus
#314Vertically-oriented servo track writer and method
#315Self-servo-writing multi-slot timing pattern
#316Magnetic recording tape having servo pattern for tape dimensional stability compensation via head skew
#317Magnetic disk device that corrects position of head by demodulation
#318Multi-actuator data storage system
#319Digitally assisted ultra-fast bandwidth calibration of a programmable analog filter
#320Multi-actuator data storage system
#321Data storage device configuration for accessing data in physical realms
#322High rpm hard disk drive testing
#323Disc locked clock-based servo timing
#324Write management of physically coupled storage areas
#325Self-servo-write systems for detecting interference caused by pre-written seed wedges
#326Codes and techniques for magnetic recording
#327Data storage device using high and low frequencies AC heat produce position-error-signals for head contact detection
#328Read sensor capable of providing multiple effective read widths
#329Servo track encoding and decoding
#330Method and apparatus for determining radial incoherence between servo tracks
#331BEMF closed loop control of disk drive actuator during a catastrophic event
#332H-bridge power amplifier for optical recording head actuator
#333Magnetic disk device, head amplifier, and controlling method of magnetic disk device
#334Magnetic disc device and self servo writing method
#335Disk drive detecting mini wedge by evaluating wedge ID of servo sector
#336Writable servo overlap zones