Method, system, and article of manufacture for self-servowriting a disk
AssigneeInternational Business Machines Corporation
InventorGeorge Anthony Dunn
Life of this patent
Estimating the term…
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.
Claims48
A method for servo writing, the method comprising:
- positioning a first head on a first track of a first disk surface;
- using the positioning of the first head on the first disk surface to position a second head on a second track on a second disk surface;
- writing, servo information with the second head at the position of the second track on the second disk surface;
- positioning the second head on a first track of the second disk surface;
- using the positioning of the second head on the second disk surface to position the first head on a second track of the first disk surface;
- and
- writing servo information with the first head at the position of the second track of the first disk surface, wherein the first and second tracks are any tracks on the first and second disk surfaces.
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 head 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 servo writing, the system comprising:
- a first disk surface;
- a second disk surface;
- a first head;
- a second head;
- means for positioning the first head on a first track of the first disk surface;
- means for using the positioning of the first head on the first disk surface to position the second head on a second track on the second disk surface;
- means for writing servo information with the second head at the position of the second track on the second disk surface;
- means for positioning the second head on a first track of the second disk surface;
- means for using the positioning of the second head on the second disk surface to position the first head on a second track of the first disk surface;
- and
- means for writing servo information with the first head at the position of the second track of the first disk surface, wherein the first and second tracks are any tracks on the first and second disk surfaces.
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.
An article of manufacturing for servo writing, wherein the article of manufacturing is capable of causing operations, the operations comprising:
- positioning a first head on a first track of a first disk surface;
- using the positioning of the first head on the first disk surface to position a second head on a second track on a second disk surface;
- writing servo information with the second head at the position of the second track on the second disk surface;
- positioning the second head on a first track of the second disk surface;
- using the positioning of the second head on the second disk surface to position the first head on a second track of the first disk surface;
- and
- writing servo information with the first head at the position of the second track of the first disk surface, wherein the first and second tracks are any tracks on the first and second disk surfaces.
The article of manufacture of 33, further comprising:
- reading servo information from at least two tracks, wherein the read servo information is used to position the second on the first track of the second disk surface in a manner that eliminates white noise.
The article of manufacture of 34, wherein the servo information is read from one of two tracks on a same disk surface or two tracks from different disk surfaces.
The article of manufacture of 34, wherein the white noise is eliminates between amplitudes of the at least two tracks from which the servo information was read.
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 head 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.