Magnetic disk device and read processing method
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorNobuhiro Maeto
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a magnetic disk device includes a disk, a head including a write head that writes data to the disk, and a first read head and a second read head that read data from the disk, and a controller that, in reading a first track of a first region of the disk, positions a middle portion of the first read head and the second read head at a first track center of the first track, and in reading a second track of a second region of the disk different from the first region, positions any one of the first read head and the second read head at a second track center of the second track.
Claims16
A magnetic disk device comprising:
- a disk;
- a head comprising a write head that writes data to the disk, and a first read head and a second read head that read data from the disk;
- and
- a controller that, in reading a first track of a first region of the disk, positions a middle portion of the first read head and the second read head at a first track center of the first track, and in reading a second track of a second region of the disk different from the first region, positions any one of the first read head and the second read head at a second track center of the second track, wherein
- when the middle portion is positioned at the first track center in the first region and read retry is repeatedly performed, the controller positions any one of the first read head and the second read head at the first track center in the first region.
A read processing method applied to a magnetic disk device comprising a disk, a head comprising a write head that writes data to the disk, and a first read head and a second read head that read data from the disk, the read processing method comprising:
- in reading a first track of a first region of the disk, positioning a middle portion of the first read head and the second read head at a first track center of the first track;
- in reading a second track of a second region of the disk different from the first region, positioning any one of the first read head and the second read head at a second track center of the second track;
- and
- when the middle portion is positioned at the first track center in the first region and read retry is repeatedly performed, positioning any one of the first read head and the second read head at the first track center in the first region.
Dependencies are inferred from the claim text.