| 摘要 |
<p>A method and apparatus determining a data transducer head (26) position relative to a selected track (18) of plural concentric tracks within a magnetic disk drive (10). At least one prerecorded servo sector (20) within a data track includes four time staggered servo bursts (50). The first pair (70, 72) and second pair (74, 76) of servo bursts are radially offset from each other by generally a burst width such that an edge from each of the pair is substantially co-linear in forming a track null. The first pair (70, 72) is radially offset from the second pair (74, 76) by one-half of the burst width. The first pair (70, 72) is read to determine a first relative amplitude (100), and the second pair (74, 76) is read to determine a second relative amplitude (102). The radially offset, time staggered prerecorded servo bursts (50) can be of varying width and number to create the plurality of track nulls within a data track (18) about which the head (26) is positioned.</p> |
