Magnetic disk device and method of generating write data
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorTomokazu Okubo
Life of this patent
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Abstract
According to one embodiment, a magnetic disk device, including a disk, a head to write data to the disk and read data from the disk, a preamplifier to generate a recording current corresponding to data that the head writes to the disk, and a controller to convert a first data pattern in first write data, in accordance with a pattern length of a second data pattern previous to the first data pattern, to a different data pattern including a pseudo polarity inversion that does not cause a polarity inversion when converting the first data pattern to the recording current.
Claims20
A magnetic disk device, comprising:
- a disk;
- a head to write data to the disk and read data from the disk;
- a preamplifier to generate a recording current corresponding to write data that the head writes to the disk;
- and
- a controller to convert a first data pattern in the write data, in accordance with a pattern length of a second data pattern previous to the first data pattern, to a different data pattern including a pseudo polarity inversion processed that the recording current does not cause a polarity inversion when converting the first data pattern to the recording current.
A magnetic disk device, comprising:
- a disk;
- a head to write data to the disk and read the data from the disk;
- a preamplifier to generate a recording current corresponding to write data that the head writes to the disk;
- and
- a controller to convert a first data pattern in the write data to a plurality of data patterns that have, at different positions, pseudo polarity inversions processed that the recording current do not cause a polarity inversion when converting the first data pattern to the recording current.
A method of generating write data applied to a magnetic disk device including a disk, a head to write data to the disk and read the data from the disk, and a preamplifier to generate a recording current corresponding to write data that the head writes to the disk, the method comprising
- converting a first data pattern in the write data to a plurality of different data patterns that have, at different positions, pseudo polarity inversions processed that the recording current does not cause a polarity inversion when converting the first data pattern to the recording current.
Dependencies are inferred from the claim text.