Method, system, and article of manufacture for self-servowriting a disk
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorGeorge Anthony Dunn
Life of this patent
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Abstract
A compound actuator self-servo writes a hard disk. The compound actuator moves to track n+1. A first head on the compound actuator track follows on track n. The other heads servo write on track n+2. One of the other heads track follow on track n. The first head servo writes track n+2. The value of n is incremented by one, and the process repeats until the entire hard disk is servo written.
Claims38
A method for writing a plurality of tracks in a self-servowriting system, the method comprising:
- moving a compound actuator having a first and a second bead to an initial track;
- positioning the first head on a previous track with respect to the initial track on a first disk surface;
- servowriting a next track with respect to the initial track on a second disk surface with the second head;
- positioning the second head on the previous track of the second disk surface;
- and
- servowriting the next track on the first disk surface with the first head.
A system for writing plurality of tracks in a self-servowriting system, the system comprising:
- an actuator having a first head and a second head;
- means for moving the actuator to an initial track;
- means for positioning the first head on a previous track of a first disk surface;
- means for writing a next track of a second disk surface with the second head;
- means for positioning the second bead on the previous track of the second disk surface, wherein the means for positioning the second head on the previous track of the second disk surface further performs moving the second head to a position on the second disk surface wherein a white noise is eliminated between an amplitude of a track previous to the previous track of the second disk surface and an amplitude of the initial track of the second disk surface;
- and
- means for writing the next track on the first disk surface with the first head.
A system for writing a plurality of tracks in a self-servowriting system, the system comprising:
- an actuator having a first head and a second head;
- means for moving the actuator to initial track;
- means for positioning the first head on a previous track of a first disk surface;
- means for writing a next track of a second disk surface with the second head;
- means for positioning the second head on the previous track of the second disk surface;
- and
- means for writing the next track on the first disk surface with the first head, wherein the means for writing the next track of the second disk surface by the second head, further performs:
- (I) determining a first position of the actuator;
- (ii) determining a second position of the first head;
- (iii) positioning the second head relative to the first position and the second position to the next track;
- and
- (iv) writing the next track on the second disk surface.
A system for writing a plurality of tracks in a self-servowriting system, the system comprising:
- an actuator having a first head and a second head;
- means for moving the actuator to an initial track;
- means for positioning the first head on a previous track of a first disk surface;
- means for writing a next track of a second disk surface with the second head;
- means for positioning the second head on the previous track of the second disk surface;
- and
- means for writing the next track on the first disk surface with the first head, wherein the means for writing the next truck on the first disk surface with the first head, further performs:
- (I) determining a first position of the actuator;
- (ii) determining a second position of the second head;
- (iii) positioning the first head relative to the first position and the second position to the next tack;
- and
- (iv) writing the next track on the first disk surface.
An article of manufacture for writing a plurality of tracks in a self-servowriting system, wherein the article of manufacture causes operations, the operations comprising:
- moving a compound actuator having a first and a second head to an initial track;
- positioning the first head on a previous track of a first disk surface;
- writing a next track of a second disk surface with the second head;
- positioning the second bead on the previous track of the second disk surface;
- and
- writing the next track on the first disk surface with the first head.
Dependencies are inferred from the claim text.