Granted Patent B1

US 9,099,134 · App. 14/607,040 · Granted Aug 4, 2015

Abstract

Claims (52)

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.

2. The data storage device as recited in claim 1 , wherein:

writing to the first radial band of the data tracks comprises shingle writing to the first radial band of the data tracks;

writing to the second radial band of the data tracks comprises shingle writing to the second radial band of the data tracks; and

the shingle writing comprising writing the data tracks in a partially overlapping manner.

3. The data storage device as recited in claim 2 , wherein the first jog profile is offset from the second jog profile by a delta corresponding to a percent that the data tracks overlap.

4. The data storage device as recited in claim 1 , wherein:

the first radial band of the data tracks is substantially contiguous with the second radial band of the data tracks; and

the first jog profile is offset from the second jog profile by a delta at the transition between the first radial band and the second radial band.

5. The data storage device as recited in claim 4 , wherein:

writing to the first radial band of the data tracks comprises shingle writing to the first radial band of the data tracks;

writing to the second radial band of the data tracks comprises shingle writing to the second radial band of the data tracks;

the shingle writing comprising writing the data tracks in a partially overlapping manner; and

the delta corresponds to a percent that the data tracks overlap.

6. The data storage device as recited in claim 1 , wherein:

writing to the first radial band comprises writing from the outer diameter of the disk toward a middle diameter of the disk; and

writing to the second radial band comprises writing from the inner diameter of the disk toward the middle diameter of the disk.

7. A method of operating a data storage device, the method 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:

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.

8. The method as recited in claim 7 , wherein:

writing to the first radial band of the data tracks comprises shingle writing to the first radial band of the data tracks;

writing to the second radial band of the data tracks comprises shingle writing to the second radial band of the data tracks; and

the shingle writing comprising writing the data tracks in a partially overlapping manner.

9. The method as recited in claim 8 , wherein the first jog profile is offset from the second jog profile by a delta corresponding to a percent that the data tracks overlap.

10. The method as recited in claim 7 , wherein:

the first radial band of the data tracks is substantially contiguous with the second radial band of the data tracks; and

the first jog profile is offset from the second jog profile by a delta at the transition between the first radial band and the second radial band.

11. The method as recited in claim 10 , wherein:

writing to the first radial band of the data tracks comprises shingle writing to the first radial band of the data tracks;

writing to the second radial band of the data tracks comprises shingle writing to the second radial band of the data tracks;

the shingle writing comprising writing the data tracks in a partially overlapping manner; and

the delta corresponds to a percent that the data tracks overlap.

12. The method as recited in claim 7 , wherein:

writing to the first radial band comprises writing from the outer diameter of the disk toward a middle diameter of the disk; and

writing to the second radial band comprises writing from the inner diameter of the disk toward the middle diameter of the disk.

Assignments (8)