Data storage device employing multiple jog profiles for a butterfly written disk surface
First Claim
1. A data storage device comprising:
- a disk comprising a plurality of data tracks;
a head actuated over the disk, the head comprising a write element radially offset from a read element by a writer/reader offset that varies relative to a radial location of the head over the disk; and
control circuitry configured to;
write to a first radial band of the data tracks from an outer diameter of the disk toward an inner diameter of the disk;
calibrate a first jog profile for the first radial band that compensates for the writer/reader offset;
write to a second radial band of the data tracks from an inner diameter of the disk toward an outer diameter of the disk;
calibrate a second jog profile for the second radial band that compensates for the writer/reader offset;
access the first radial band of data tracks using the first jog profile; and
access the second radial band of data tracks using the second jog profile.
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Accused Products
Abstract
A data storage device is disclosed comprising a head actuated over a disk comprising a plurality of data tracks, wherein the head comprises a write element radially offset from a read element by a writer/reader offset that varies relative to a radial location of the head over the disk. A first radial band (RB) of the data tracks is written from an outer diameter (OD) of the disk toward an inner diameter (ID) of the disk, and a first jog profile is calibrated for the first radial band that compensates for the writer/reader offset. A second RB is written from an ID to an OD, and a second jog profile is calibrated for the second RB that compensates for the writer/reader offset. The first RB is accessed using the first jog profile, and the second RB is accessed using the second jog profile.
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Citations
12 Claims
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1. A data storage device comprising:
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a disk comprising a plurality of data tracks; a head actuated over the disk, the head comprising a write element radially offset from a read element by a writer/reader offset that varies relative to a radial location of the head over the disk; and control circuitry configured to; write to a first radial band of the data tracks from an outer diameter of the disk toward an inner diameter of the disk; calibrate a first jog profile for the first radial band that compensates for the writer/reader offset; write to a second radial band of the data tracks from an inner diameter of the disk toward an outer diameter of the disk; calibrate a second jog profile for the second radial band that compensates for the writer/reader offset; access the first radial band of data tracks using the first jog profile; and access the second radial band of data tracks using the second jog profile. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of operating a data storage device, the method comprising:
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a disk comprising a plurality of data tracks; a head actuated over the disk, the head comprising a write element radially offset from a read element by a writer/reader offset that varies relative to a radial location of the head over the disk; and control circuitry configured to; writing to a first radial band of data tracks from an outer diameter of a disk toward an inner diameter of the disk; calibrating a first jog profile for the first radial band that compensates for a writer/reader offset between a write element radially offset from a read element of a head; writing to a second radial band of the data tracks from an inner diameter of the disk toward an outer diameter of the disk; calibrating a second jog profile for the second radial band that compensates for the writer/reader offset; accessing the first radial band of data tracks using the first jog profile; and accessing the second radial band of data tracks using the second jog profile. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification