Patent ID: 6057984
Filing Date: 2000-05-02
Classification: G11B

Abstract:
A method for conducting data writing/reading-out by a contact start and stop system, which comprises:using a magnetic disc comprising a data zone for writing/reading-out data and a contact start and stop zone comprising a taking-off/landing region and a stopping region, for a contact start and stop operation of a magnetic head,wherein a plurality of projections are present in the contact start and stop zone, the height of the projections in the taking-off/landing region lowers from the center of the magnetic disc toward the data zone in the radial direction, an average gradient for the height of the projections in the taking-off/landing region is 1.times.10.sup.-6 to 5.times.10.sup.-5, the maximum height of the projections in the contact start and stop zone is higher than a flying height of the magnetic head, and the minimum height of the projections in the contact start and stop zone is lower than the flying height of the magnetic head,contact-head seeking and spinning down/spinning up a disc rotation on the sloped projections, andconducting recording/reading operation by flying the magnetic head at a height lower than the maximum height of the projections.