Magnetic disk device and method
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorHideo Shimokawa
Life of this patent
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Abstract
According to one embodiment, a magnetic disk device includes a magnetic disk, a first magnetic head, a second magnetic head, a buffer memory, and a control circuit. The magnetic disk includes a plurality of first storage regions. The control circuit controls the first magnetic head to read first data from a second storage region of the first storage regions to the buffer memory. The control circuit controls the second magnetic head to write second data to a third storage region concurrently with the reading of the first data. The third region is of the first storage regions, different from the second storage region. The second data corresponds to the first data stored in the buffer memory.
Claims15
A magnetic disk device comprising:
- a magnetic disk including a plurality of first storage regions;
- a first magnetic head;
- a second magnetic head;
- a buffer memory;
- and
- a control circuit that:
- controls the first magnetic head to read first data from a second storage region of the first storage regions to the buffer memory, and
- controls the second magnetic head to write second data to a third storage region concurrently with the reading of the first data, the third region being of the first storage regions, different from the second storage region, the second data corresponding to the first data stored in the buffer memory.
A magnetic disk device comprising:
- a magnetic disk including a first region and a second region different from the first region;
- a first magnetic head;
- a second magnetic head;
- a buffer memory;
- and
- a control circuit that controls the first magnetic head and the second magnetic head to read and write data from and to the magnetic disk, wherein
- the first magnetic head reads first data from the first region,
- the control circuit stores the first data in the buffer memory, and
- the second magnetic head writes second data corresponding to the first data to the second region before completion of storing the first data in the buffer memory.
A method for controlling a magnetic disk device comprising a magnetic disk including a plurality of first storage regions;
- a first magnetic head;
- a second magnetic head;
- a first actuator that moves the first magnetic head;
- a second actuator that moves the second magnetic head;
- and a buffer memory,
- the method comprising:
- controlling the first magnetic head and the first actuator to read first data from a second storage region of the first storage regions to the buffer memory;
- and
- controlling the second magnetic head and the second actuator to write second data to a third storage region concurrently with the reading of the first data, the second data corresponding to the first data stored in the buffer memory, the third storage region being of the first storage regions, different from the second storage region.
Dependencies are inferred from the claim text.