Magnetic disk device and read control method
AssigneeKabushiki Kaisha Toshiba
InventorsNobuhiro Maeto, Kohsuke Harada
Life of this patent
Estimating the term…
Abstract
According to one embodiment, switching takes place between a first control in which a first read head is assigned as a master head for reading data from a magnetic disk on which a sequential write direction is reversed at a switching position where a skew angle of a write head becomes 0 and between an outer periphery and an inner periphery in shingled write recording, and a second read head is assigned as a slave head for reducing inter-track interference during reading of the data and noise by virtue of an effect of waveform averaging with respect to the master head, and a second control in which the second read head is assigned as the master head and the first read head is assigned as the slave head.
Claims20
A magnetic disk device, comprising:
- a magnetic disk on which a sequential write direction is reversed at a switching position where a skew angle of a write head becomes 0 and between an outer periphery and an inner periphery in shingled write recording;
- a first read head that reads data recorded on the magnetic disk;
- a second read head that reads data recorded on the magnetic disk;
- and
- a switching control unit that is configured to switch between a first control in which the first read head is assigned as a master head for reading data and the second read head is assigned as a slave head for reading data on a track adjacent to a track on which the data read by the master head is recorded, and a second control in which the second read head is assigned as the master head and the first read head is assigned as the slave head.
A reading control method, comprising:
- switching between a first control in which a first read head is assigned as a master head for reading data from a magnetic disk on which a sequential write direction is reversed at a switching position where a skew angle of a write head becomes 0 and between an outer periphery and an inner periphery and a second read head is assigned as a slave head for reading data from a track adjacent to a track on which the data read by the master head is recorded, and a second control in which the second read head is assigned as the master head and the first read head is assigned as the slave head.
Dependencies are inferred from the claim text.