Disk storage apparatus and data storage method
AssigneeKabushiki Kaisha Toshiba
InventorMasatoshi Aoki
Life of this patent
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Abstract
According to one embodiment, a disk storage apparatus includes a disk, a detector, and a controller. The disk includes a first recording area for recording with a first track density, and a second recording area for recording with a second track density lower than the first track density. The detector is configured to detect a variation of an outside environment. The controller is configured to select a nonvolatile memory or the second recording area as a storage destination of write data transferred from a host, based on a content of the variation of the outside environment detected by the detector, and a state of capability or incapability of storage of the nonvolatile memory.
Claims15
A disk storage apparatus comprising:
- a disk comprising a recording area for recording data transferred from a host;
- a nonvolatile semiconductor memory configured to record the data transferred from the host;
- and
- a controller configured to select the nonvolatile semiconductor memory or the recording area, based on a variation of an environment detected by a detector, and free space of the nonvolatile semiconductor memory,
- wherein the controller is configured to select the nonvolatile semiconductor memory when the variation of the environment is vibration or an atmospheric pressure variation and the variation of the environment is outside a permissible range, and to select the recording area when the nonvolatile semiconductor memory is incapable of storing data.
A disk storage apparatus comprising:
- a disk comprising a recording area for recording data transferred from a host;
- a nonvolatile semiconductor memory configured to record the data transferred from the host;
- and
- a controller configured to select the nonvolatile semiconductor memory or the recording area, based on a variation of an environment detected by a detector, and free space of the nonvolatile semiconductor memory,
- wherein the controller is configured to select the recording area when the variation of the environment is a temperature variation and the variation of the environment is outside a permissible range.
A method of storing data in a disk storage apparatus, which comprises a disk comprising a recording area for recording data transferred from a host, a nonvolatile semiconductor memory configured to record the data transferred from the host, and a detector configured to detect a variation of an environment, the method comprising:
- receiving data transferred from the host;
- selecting the nonvolatile semiconductor memory or the recording area, based on the variation of the environment detected by the detector, and free space of the nonvolatile semiconductor memory;
- selecting the nonvolatile semiconductor memory when the variation of the environment is vibration or an atmospheric pressure variation and the variation of the environment is outside a permissible range;
- and
- selecting the recording area when the nonvolatile semiconductor memory is incapable of storing data, or when the variation of the environment is a temperature variation and the variation of the environment is outside a permissible range.
Dependencies are inferred from the claim text.