Disk drive employing multiple read elements to increase radial band for two-dimensional magnetic recording
First Claim
Patent Images
1. A disk drive comprising:
- a disk comprising a plurality of tracks;
a head comprising at least three read elements including a first read element, a second read element, and a third read element; and
control circuitry configured to;
when the head is within a first radial band of the disk, detect data recorded on the disk using the first read element and the second read element; and
when the head is within a second radial band of the disk different from the first radial band, detect data recorded on the disk using the first read element and the third read element,wherein when the head is over approximately a middle diameter of the disk, the first read element is substantially aligned down-track with the third read element and the second read element is offset radially from the first read element and the third read element by at least half a width of the second read element.
9 Assignments
0 Petitions
Accused Products
Abstract
A disk drive is disclosed comprising a disk comprising a plurality of tracks, and a head comprising at least three read elements including a first read element, a second read element, and a third read element. When the head is within a first radial band of the disk, data recorded on the disk is detected using the first read element and the second read element. When the head is within a second radial band of the disk different from the first radial band, data recorded on the disk is detected using the first read element and the third read element. The first read element is substantially aligned down-track with the third read element when the head is over a first radial location of the disk.
-
Citations
24 Claims
-
1. A disk drive comprising:
-
a disk comprising a plurality of tracks; a head comprising at least three read elements including a first read element, a second read element, and a third read element; and control circuitry configured to; when the head is within a first radial band of the disk, detect data recorded on the disk using the first read element and the second read element; and when the head is within a second radial band of the disk different from the first radial band, detect data recorded on the disk using the first read element and the third read element, wherein when the head is over approximately a middle diameter of the disk, the first read element is substantially aligned down-track with the third read element and the second read element is offset radially from the first read element and the third read element by at least half a width of the second read element. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method of operating a disk drive, the method comprising:
-
when a head is within a first radial band of a disk, detecting data recorded on the disk using a first read element and a second read element; and when the head is within a second radial band of the disk different from the first radial band, detecting data recorded on the disk using the first read element and a third read element, wherein when the head is over approximately a middle diameter of the disk, the first read element is substantially aligned down-track with the third read element and the second read element is offset radially from the first read element and the third read element by at least half a width of the second read element. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A disk drive comprising:
-
a disk comprising a plurality of tracks; a head comprising at least three read elements including a first read element, a second read element, and a third read element; and control circuitry configured to; select the first read element and the second read element to detect first user data recorded on the disk when the head is at a first radial location over the disk, wherein the third read element is not used to detect the first user data; and select the second read element and the third read element to detect second user data recorded on the disk when the head is at a second radial location over the disk different from the first radial location, wherein the first read element is not used to detect the second user data. - View Dependent Claims (16, 17, 18, 19)
-
-
20. A method of operating a disk drive, the method comprising:
-
selecting a first read element and a second read element to detect first user data recorded on a disk when a head is at a first radial location over the disk, wherein a third read element is not used to detect the first user data; and selecting the second read element and the third read element to detect second user data recorded on the disk when the head is at a second radial location over the disk different from the first radial location, wherein the first read element is not used to detect the second user data. - View Dependent Claims (21, 22, 23, 24)
-
Specification