Magnetic disk device and method
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorTomokazu Okubo
Life of this patent
Estimating the term…
Abstract
According to an embodiment, a processing circuit of a magnetic disk device modulates a recording width in the radial direction of a first data sequence depending on a first combination and a second combination when writing data to a first track. The first track is adjacent to a second track in which data is already written. The first combination is a combination of the first data sequence that is data written to the first track and a second data sequence that is data already written to the second track. The second combination is a combination of polarities at the bit position of the first track and the bit position of the second track adjacent to each other in the radial direction.
Claims20
A magnetic disk device comprising:
- a magnetic disk including a plurality of tracks;
- a magnetic head that writes data to and reads data from the magnetic disk;
- and
- a processing circuit that modulates a recording width in a radial direction of a first data sequence depending on a first combination and a second combination when data is written in a first track among the plurality of tracks by the magnetic head, the first data sequence being the data to be written in the first track, the first track being a track adjacent to a second track that is a track on which the data is already written among the plurality of tracks, the first combination being a combination of the first data sequence and a second data sequence that is data already written in the second track, the second combination being a combination of polarities at a bit position of the first track and a bit position of the second track adjacent to each other in the radial direction.
A method comprising
- writing data to a first track among a plurality of tracks included in a magnetic disk using a magnetic head, wherein
- the first track is a track adjacent to a second track that is a track on which data is already written among the plurality of tracks, and
- the writing includes
- modulating a recording width in a radial direction of a first data sequence depending on a first combination and a second combination, the first data sequence being the data to be written in the first track, the first combination being a combination of the first data sequence and a second data sequence that is the data already written in the second track, the second combination being a combination of polarities at a bit position of the first track and a bit position of the second track adjacent to each other in the radial direction.
Dependencies are inferred from the claim text.