Title :
HDD servo technology for media-level servo track writing
Abstract :
HDD servo technology for media-level servo track writing (STW) has been developed. The media-level STW is a process to write servo signal on magnetic disks before they are separately assembled in drives. It supplies a solution to achieve low-cost and accurate servo-signal writing. The media-level STW apparatus has an actuator with magnetic heads and an air-bearing spindle motor on which magnetic disks are mounted. The servo controller of HDD with disks of media-level STW compensates radial and rotational distortions of the servo signal (e.g. track-address, RRO, and servo signal timing). The calibrations to compensate the distortions are executed in a factory.
Keywords :
disc drives; distortion; feedforward; hard discs; magnetic heads; position control; servomechanisms; timing; HDD servo technology; RRO; air-bearing spindle motor; calibrations; magnetic heads; media-level STW apparatus; media-level servo track writing; radial distortions; repeatable run-out; rotational distortions; servo controller; servo signal; signal timing; track-address; Actuators; Assembly; Distortion; Drives; Magnetic heads; Magnetic separation; Servomechanisms; Servomotors; Signal processing; Writing;
Conference_Titel :
Magnetic Recording Conference, 2002. Digest of the Asia-Pacific
Conference_Location :
Singapore
Print_ISBN :
0-7803-7509-2
DOI :
10.1109/APMRC.2002.1037637
