Patent ID: 7286316
Filing Date: 2007-10-23
Classification: G11B

Abstract:
1. A method for writing patterns of sectors, in which, on a rotating recording disk, while a read element is following a first track by means of servo control, a write element different from the read element in terms of radial position writes patterns of each sector of a second track different from the first track, with patterns of each sector of the first track as reference patterns, said method comprising: writing servo patterns of plural sectors of the first track; calculating correction data by multiply and add operations between position errors from a target position of the read element, which are associated with each sector during the writing of the first track, and a set of coefficients pre-registered to suppress propagation amplification levels of track position errors due to servo writing at selected frequencies in closed loop response of servo positioning of a servo loop; positioning the read element at each sector of the first track by conducting servo control corrections using the correction data; and with the read element positioned, activating the write element to write the patterns of each sector onto the second track by using the patterns of each sector of the first track as reference patterns.