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US 7,023,648 B2Granted
Method and apparatus for writing servo data in a disk drive
AssigneeKabushiki Kaisha Toshiba
InventorSeiji Mizukoshi
Life of this patent
Estimating the term…
Abstract
A disk drive having a servo writer is disclosed. The servo writer is configured to write a new servo pattern for which an offset is adjusted by using an offset value of a track unit with respect to a disk on which a basic servo pattern is recorded.
Claims8
A disk drive comprising:
- a head which records or reproduces data including one or both of a basic servo pattern and a new servo pattern with respect to a disk medium having a disk surface on which the basic servo pattern is recorded in advance, the head including a read head element which reproduces the data and a write head element which records the data;
- a positioning control unit which positions the head at a target position on the disk medium in accordance with one of the basic servo pattern and the new servo pattern reproduced by the head;
- an obtaining unit which obtains an offset value according to track position information of the basic servo pattern reproduced by the head at the target position, the offset value being a positional error between a reference position from a rotation center of the disk medium and an actual position from a rotation center of tracks formed based on the basic servo pattern;
- and
- a servo write unit which writes the new servo pattern on the disk medium with the head by using the track position information and the offset value.
2 more elements
A method of writing servo data in a disk drive, the disk drive including a disk medium on which a basic servo pattern is recorded in advance and a head which executes a read/write operation of data including one or both of a basic servo pattern and a new servo pattern, the method comprising:
- positioning the head at a target position on the disk medium in accordance with the basic servo pattern;
- reproducing the basic servo pattern by using the head positioned at the target position;
- obtaining an offset value according to track position information of the basic servo pattern reproduced by the head at the target position, the offset value being a positional error between a reference position from a rotation center of the disk medium and an actual position from a rotation center of tracks formed based on the basic servo pattern;
- and
- writing a new servo pattern on the disk medium with the head by using the track position information and the offset value.
2 more elements
Dependencies are inferred from the claim text.