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US 6,519,107 B1Granted
Hard disk drive having self-written servo burst patterns
AssigneeMaxtor Corporation
InventorsRichard M. Ehrlich, Jong Lin, David B. Jeppson, Kenji Oki
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AssigneeMaxtor Corporation
InventorsRichard M. Ehrlich, Jong Lin, David B. Jeppson, Kenji Oki
Estimating the term…
A method for servowriting a magnetic hard disk drive includes servowriting a first servo burst pattern by using a servowriter coupled to a head-disk assembly within a clean room environment, self-writing at least a second servo burst pattern radially offset relative to the first burst pattern by reading the first burst pattern without using the servowriter, and self-writing a final burst pattern by using the first burst pattern and the second burst pattern without using the servowriter. One or more intermediate burst patterns may be provided to accommodate writer/reader offset of dual element read heads in order to produce final product servo burst patterns. A disk drive having embedded servo sectors each including an untrimmed six-burst final servo pattern is also disclosed. The disk drive self-writes at least some of the final servo pattern.
A method for servowriting track locations of a storage surface of a magnetic hard disk of a head-disk assembly, comprising the steps of:
A magnetic hard disk drive including at least one data storage disk, a head transducer comprising an inductive write element and a magneto-resistive read element and positioned at radial track locations defined on a storage surface of the disk by a head positioner, the disk drive including a drive controller for controlling at least the head positioner to position the head transducer at selected data tracks, the disk drive having reference servo patterns recorded onto at least a part of the storage surface by a servo writer as a part of a manufacturing process, the reference servo patterns being incomplete with respect to a final product pattern, the disk drive having self-servowriting software executed by the drive for self-writing embedded servo final product patterns across the storage surface in response to the reference servo patterns, wherein the disk drive self-servo-writing software causes the disk drive to self-write intermediate servo bursts using the reference servo patterns, wherein said intermediate servo bursts are used to write said final product patterns, wherein said intermediate servo bursts are written in user data locations, and wherein said intermediate servo bursts are overwritten with user data.
A method of writing servo information onto a disk surface of a disk drive, the method comprising the steps of:
Dependencies are inferred from the claim text.