Patent ID: 6608731
Filing Date: 2003-08-19
Classification: G11B

Abstract:
A method for writing a servo track to a data storage disc in a data storage device, the data storage device having an actuator arm located adjacent to the disc that traverses a surface of the disc, a transducer head attached to the actuator arm, the transducer head having a read element and a write element, the method comprising steps of:a) writing a servo track k on the disc; b) reading the servo track k with the read element; c) determining an estimated track shape of the servo track k; d) writing the estimated shape of the servo track k as a zero acceleration path (â€œZAPâ€ ) correction factor within the servo track k; e) following servo track k corrected by the ZAP correction factor for track k with the read element; f) writing a servo track k+1 with the write element while simultaneously monitoring and recording a position of the read element relative to the surface of the disc; g) computing an estimated shape of the servo track k+1 from the position of the read element obtained in writing step (f); h) aligning the read element over the servo track k+1; i) applying the estimated shape of the servo track k+1 as a ZAP correction factor for the servo track k+1; j) following servo track k+1 corrected by the ZAP correction factor for track k+1 with the read element; and, k) monitoring a ZAP corrected read element position over the servo track k+1.