Disk drive configuring one-dimensional and two-dimensional recording areas based on read element spacing
First Claim
1. A disk drive comprising:
- a disk comprising a plurality of tracks;
a head comprising at least two read elements including a first read element and a second read element; and
control circuitry configured to;
measure a spacing of the first and second read elements;
based on the measured spacing, group the tracks into radial bands that define at least one one-dimensional recording area on the disk and at least one two-dimensional recording area on the disk;
when the head is within a first two-dimensional recording area, detect data recorded on the disk by processing a first read signal generated by the first read element and by processing a second read signal generated by the second read element using a two-dimensional demodulation algorithm; and
when the head is within a first one-dimensional recording area, detect data recorded on the disk by processing the first read signal using a one-dimensional demodulation algorithm.
7 Assignments
0 Petitions
Accused Products
Abstract
A disk drive is disclosed comprising a disk comprising a plurality of tracks, and a head comprising a first read element and a second read element. A spacing of the first and second read elements is measured, and based on the measured spacing, the tracks are grouped into radial bands that define at least one one-dimensional recording area on the disk and at least one two-dimensional recording area on the disk. When the head is within a first two-dimensional recording area, data recorded on the disk is detected by processing a first read signal generated by the first read element and by processing a second read signal generated by the second read element using a two-dimensional demodulation algorithm. When the head is within a first one-dimensional recording area, data recorded on the disk is detected by processing the first read signal using a one-dimensional demodulation algorithm.
549 Citations
16 Claims
-
1. A disk drive comprising:
-
a disk comprising a plurality of tracks; a head comprising at least two read elements including a first read element and a second read element; and control circuitry configured to; measure a spacing of the first and second read elements; based on the measured spacing, group the tracks into radial bands that define at least one one-dimensional recording area on the disk and at least one two-dimensional recording area on the disk; when the head is within a first two-dimensional recording area, detect data recorded on the disk by processing a first read signal generated by the first read element and by processing a second read signal generated by the second read element using a two-dimensional demodulation algorithm; and when the head is within a first one-dimensional recording area, detect data recorded on the disk by processing the first read signal using a one-dimensional demodulation algorithm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method of operating a disk drive, the method comprising:
-
measuring a spacing of first and second read elements of a head; based on the measured spacing, grouping tracks on a disk into radial bands that define at least one one-dimensional recording area on the disk and at least one two-dimensional recording area on the disk; when the head is within a first two-dimensional recording area, detecting data recorded on the disk by processing a first read signal generated by the first read element and by processing a second read signal generated by the second read element using a two-dimensional demodulation algorithm; and when the head is within a first one-dimensional recording area, detecting data recorded on the disk by processing the first read signal using a one-dimensional demodulation algorithm. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
Specification