Magnetic disk device and method of controlling the same
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorYuma Kinohara
Life of this patent
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Abstract
According to one embodiment, a magnetic disk device includes a first write control section of writing first data and second data to each of the sectors of a predetermined track among the tracks, a second write control section of writing the first data to each of the sectors of a predetermined track among the tracks, and a selection control section of, when receiving a write command, estimating the time required from start of a process of the first write control section to end of the process, and selectively executing the process of the first write control section or a process of the second write control section by comparing the estimated time with a time limit specified in advance.
Claims10
A magnetic disk device comprising:
- a circular magnetic disk including a plurality of tracks for data recording composed of a plurality of sectors arranged in a circumferential direction, the tracks being formed to be arranged in a radial direction;
- a magnetic head provided to seek in the radial direction of the magnetic disk and which writs and reads data to and from the magnetic disk;
- and
- a controller which controls rotation of the magnetic disk and seek of the magnetic head, wherein
- the controller includes:
- a first write control section of writing first data and second data to each of the sectors of a predetermined track among the tracks;
- a second write control section of writing the first data to each of the sectors of a predetermined track among the tracks;
- and
- a selection control section of, when receiving a write command, estimating the time required from start of a process of the first write control section to end of the process, and selectively executing the process of the first write control section or a process of the second write control section by comparing the estimated time with a time limit specified in advance.
A method of controlling a magnetic disk device comprising a circular magnetic disk including a plurality of tracks for data recording composed of a plurality of sectors arranged in a circumferential direction, the tracks being arranged in a radial direction, a magnetic head provided to seek in the radial direction of the magnetic disk and writing and reading data to and from the magnetic disk, and a controller controlling rotation of the magnetic disk and seek of the magnetic head, the method comprising:
- first write control of writing first data and second data to each of the sectors of a predetermined track among the tracks;
- second write control of writing the first data to each of the sectors of a predetermined track among the tracks;
- and
- selection control of, when receiving a write command, estimating the time required from start of a process of the first write control to end of the process, and selectively executing the process of the first write control or a process of the second write control by comparing the estimated time with a time limit specified in advance.
Dependencies are inferred from the claim text.