Two-dimensional magnetic recording device capable of positioning the head based on reading of first and second readers
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorsNobuhiro Maeto, Takeyori Hara, Takayuki Kawabe
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a magnetic disk device includes a disk including a plurality of servo data items, a head including a write head which writes data to the disk, and a first read head and a second read head which read data from the disk, and a controller configured to position the head based on a first signal in which write data positioned between the servo data items of the disk is read by the first read head, and a second signal in which the write data is read by the second read head separated from the first read head in a radial direction of the disk.
Claims13
A magnetic disk drive, comprising:
- a disk comprising a plurality of servo data items;
- a head comprising a write head which writes data to the disk, and a first read head and a second read head which read data from the disk;
- and
- a controller configured to position the head based on a first signal in which write data positioned between the servo data items of the disk is read by the first read head, and a second signal in which the write data is read by the second read head separated from the first read head in a radial direction of the disk, wherein
- the controller positions the head based on a size of the first signal and a size of the second signal, and shifts the head in a first direction from the first read head towards the second read head in the radial direction in a case where the size of the first signal decreases and the size of the second signal increases.
A read processing method applied to a magnetic disk drive which comprises a disk comprising a plurality of servo data items, and a head comprising a write head which writes data with respect to the disk, and a first read head and a second read head which read data from the disk, the method comprising:
- positioning the head based on a first signal in which write data positioned between the servo data items of the disk is read by the first read head, and a second signal in which the write data is read by the second read head separated from the first read head in a radial direction of the disk;
- positioning the head based on a size of the first signal and a size of the second signal;
- and
- in a case where the size of the first signal decreases, and the size of the second signal increases, shifting the head in a first direction from the first read head towards the second read head in the radial direction.
A magnetic disk drive, comprising:
- a disk comprising a plurality of servo data items;
- a head comprising a write head which writes data to the disk, and a first read head and a second read head which read data from the disk;
- and
- a controller configured to position the head based on a first signal in which write data positioned between the servo data items of the disk is read by the first read head, and a second signal in which the write data is read by the second read head separated from the first read head in a radial direction of the disk, wherein
- in a case where the size of the first signal decreases, and the size of the second signal decreases, the controller shifts the head in a second direction from the second read head towards the first read head in the radial direction.
Dependencies are inferred from the claim text.