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US 9,792,939 B2Granted
Servo tracking using a single servo writing pass per track for multi sensors
AssigneeSeagate Technology LLC
InventorsRiyan Mendonsa, Puskal Prasad Pokharel
Life of this patent
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Abstract
At least a portion of a first servo mark is read using a first read head during a rotation of a disk, the rotation comprising no more than 360 degrees. At least a portion of a second servo mark is read using a second read head during the rotation of the disk. Tracking positions of the first read head and the second read head are determined during the rotation based on reading the first servo mark and the second servo mark.
Claims18
A method comprising:
- reading at least a portion of a first servo mark using a first read head during a rotation of a disk, the rotation comprising no more than 360 degrees;
- reading at least a second portion of the first servo mark using a second read head during the rotation of the disk;
- reading at least a portion of a second servo mark using the second read head during the rotation of the disk;
- and
- determining tracking positions of the first read head and the second read head during the rotation based on reading the first servo mark and the second servo mark.
2 more elements
An apparatus, comprising:
- a first reader configured to read at least a portion of a first servo mark during a first single rotation of a disk;
- a second reader configured to read at least a second portion of the first servo mark and at least a portion of a second servo mark during the first single rotation of the disk;
- and
- a controller configured to determine tracking positions of the first reader and the second reader during the first single rotation based on reading the first servo mark and the second servo mark.
1 more element
An apparatus, comprising:
- a first reader configured to read at least a portion of a first servo during a single rotation of a disk;
- a second reader configured to read at least a second portion of the first servo and at least a portion of a second servo during the single rotation of the disk;
- and
- a controller configured to determine tracking positions of the first and second readers during the single rotation based on reading the first and second servos and to determine a cross-track displacement between the first and second readers based on the first and second servos.
1 more element
Dependencies are inferred from the claim text.