Patent ID: 6219197
Filing Date: 2001-04-17
Classification: G11B

Abstract:
Apparatus for servo positioning in a disk file comprising:at least one disk mounted for rotation about an axis and having at least one disk surface for storing data;transducer means mounted for movement across said disk surface for writing to and for reading data and servo patterns from said disk surface; said transducer means including a read element and a write element, said read element having a width less than said write element and said read element being greater than 1/3 of the width of a data cylinder and less than 1/2 the width of the data cylinder; anda servo pattern written on said data disk surface having a non-zero track pitch of less than 1/2 of the width of a data cylinder and said servo pattern repeating in a selected number of data cylinders; said selected number being a value equal to a positive power of two.