Patent ID: 6493176
Filing Date: 2002-12-10
Classification: G11B

Abstract:
A disk drive, comprising:first and second disk surfaces that are substantially parallel with and spaced from one another; first and second heads for transferring data to and from the first and second disk surfaces, respectively; a multi-stage actuator that includes a primary actuator for positioning the first and second heads, a first secondary actuator for positioning the first head, and a second secondary actuator for positioning the second head; and a data transfer device that causes the first head to write first servo tracks to the first disk surface with a first TPI format and the second head to write second servo tracks to the second disk surface with a second TPI format, wherein the first head writes at least two of the first servo tracks to the first disk surface while the primary actuator is maintained at a fixed position, and the second head writes at least two of the second servo tracks to the second disk surface while the primary actuator is maintained at a fixed position.