HIGH DENSITY TIMING BASED SERVO FORMAT FOR USE WITH TILTED TRANSDUCER ARRAYS
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Accused Products
Abstract
A product, according to one embodiment, includes a magnetic recording tape having opposite ends, a longitudinal axis of the magnetic recording tape being defined between the ends. The magnetic recording tape has at least one servo track, the at least one servo track having a plurality of first magnetic bars and a plurality of third magnetic bars oriented to form chevron-like patterns with the first magnetic bars. The first magnetic bars each have a longitudinal axis oriented at a first angle between 2 and 88 degrees from the longitudinal axis of the magnetic recording tape. The third magnetic bars each have a longitudinal axis oriented at a second angle between 2 and 88 degrees from the longitudinal axis of the magnetic recording tape, the second angle having a different numerical absolute value than the first angle.
129 Citations
20 Claims
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1. (canceled)
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2. A product comprising:
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a magnetic recording tape having opposite ends, a longitudinal axis of the magnetic recording tape being defined between the ends; the magnetic recording tape having at least one servo track, the at least one servo track having a plurality of first magnetic bars and a plurality of third magnetic bars oriented to form chevron-like patterns with the first magnetic bars, the first magnetic bars each having a longitudinal axis oriented at a first angle between 2 and 88 degrees from the longitudinal axis of the magnetic recording tape, the third magnetic bars each having a longitudinal axis oriented at a second angle between 2 and 88 degrees from the longitudinal axis of the magnetic recording tape, the second angle having a different numerical absolute value than the first angle, wherein at least first and second ones of the servo tracks are present, wherein a centerline between the first and third magnetic bars of the first servo track is substantially collinear with a centerline between the first and third magnetic bars of the second servo track, the centerlines being at an angle less than 90 degrees from the longitudinal axis of the magnetic recording tape. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for detecting skew, the method comprising:
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reading at least two servo tracks on a magnetic recording tape, the servo tracks each having a plurality of first magnetic bars, at least a plurality of second magnetic bars, and a plurality of third magnetic bars oriented to form chevron-like patterns with the first magnetic bars, the second magnetic bars being positioned between sets of the first and third magnetic bars in a servo frame, the first magnetic bars each having a longitudinal axis oriented a first angle between 2 and 88 degrees from the longitudinal axis of the magnetic recording tape, the third magnetic bars each having a longitudinal axis oriented at a second angle between 2 and 88 degrees from the longitudinal axis of the magnetic recording tape, the second angle having a different numerical absolute value than the first angle, wherein the second magnetic bars each have a longitudinal axis oriented substantially 90 degrees from the longitudinal axis of the magnetic recording tape; determining a timing offset between detection of the second magnetic bars of the servo tracks; and calculating a skew based on the timing offset. - View Dependent Claims (16, 17, 18)
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19. An apparatus, comprising:
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a magnetic head; a drive mechanism for passing a magnetic recording tape over the magnetic head; and a controller electrically coupled to the magnetic head, the controller being configured to; receive signals from the magnetic head as it reads at least two servo tracks on a magnetic recording tape, the servo tracks each having a plurality of first magnetic bars, a plurality of second magnetic bars, and a plurality of third magnetic bars oriented to form chevron-like patterns with the first magnetic bars, the second magnetic bars being positioned between sets of the first and third magnetic bars in a servo frame, the first magnetic bars each having a longitudinal axis oriented a first angle between 2 and 88 degrees from the longitudinal axis of the magnetic recording tape, the third magnetic bars each having a longitudinal axis oriented at a second angle between 2 and 88 degrees from the longitudinal axis of the magnetic recording tape, the second angle having a different numerical absolute value than the first angle; determine a timing offset between detection of the second magnetic bars of the servo tracks; and calculate a skew based on the timing offset. - View Dependent Claims (20)
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Specification