Patent ID: 6067206
Filing Date: 2000-05-23
Classification: G11B

Abstract:
A disk drive having a sampled signal head positioning servo system, first and second rotating recording surfaces wherein each recording surface has multiple sequentially-active equally spaced-apart servo wedges, first and second heads mounted in a stacked arrangement and disposed over the first and second recording surfaces respectively, and including a processor for controlling disk operations, the disk drive further comprising:the first head having a first position over a first servo wedge;the second head having a second position over a second servo wedge;a means for providing a value representing a rotational offset between the first position and the second position;a means for detecting a servo wedge including a timing means programmable by the processor, to establish a window for reading the servo wedge; andafter a head switch from the first head to the second head the processor applying the rotational offset value to the timing means to establish a window for reading a servo wedge on the second recording surface.