Patent ID: 6320718
Filing Date: 2001-11-20
Classification: G11B

Abstract:
A disk drive comprising:a rotary actuator;an embedded servo system for controlling the rotary actuator;a dual element head supported by the actuator, the dual element head comprising a read element and a write element;a rotating disk surface for recording and reproducing data;a plurality of radially spaced-apart servo tracks disposed on the disk surface;a user data band, disposed on the disk surface, having a plurality of radially spaced-apart data tracks for storing user data wherein each data track is offset from a corresponding servo track centerline depending on a skew introduced by the dual element head; anda reserved band, located outside the user data band, including a reserved data track for storing drive specific data wherein the reserved data track is centrally aligned with a corresponding servo track centerline;wherein the offset is measured during manufacturing and stored in the reserved band and whereby the reserved data track can be read reliably by the read element when the servo system is tracking on the corresponding servo track centerline.