The invention relates to a disk drive and related method for improved disk rotation rate control in the presence of seek operations. A spindle motor rotates a spindle, supporting at least one disk with a magnetic recording surface, in response to a motor current. The actuator radially positions a transducer head over the recording surface. The motor is subjected to a torque load component related to the transducer head radial position. The spindle motor controller has a feedback control loop and a feedforward control element. The feedback control loop maintains a relatively constant spindle rotation rate based on a difference error between a predetermined target spindle rotation rate parameter and a measured spindle rotation rate parameter. The feedforward control element, in conjunction with a seek operation, adjusts the motor current based on a target head radial position with respect to an initial head radial position.

 
Web www.patentalert.com

< Disk drive employing off-line sector verification and relocation of marginal sectors discovered during read error recovery procedure

< Internal disk drive temperature estimation

> High precision servo track writing with position error signal feedback

> Method and apparatus for partial self-servo writing using servo wedge propagation

~ 00264