Storage device and information processing system
First Claim
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1. A storage device, comprising:
- a data-readable/writable storage medium;
a data-readable/writable nonvolatile memory; and
a controller configured to manage one of respective physical storage areas of the storage medium and the nonvolatile memory as a logical storage area and, in response to an access request from an external source, the controller executes access to either one or both of the storage medium and the nonvolatile memory,wherein when a write request for data from an external source is present, the controller performs computation of time necessary for a write of the data to the storage medium, and executes the write to the nonvolatile memory if the computation result is greater than or equal to a predetermined value.
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Abstract
A storage device includes a data-readable/writable storage medium, a data-readable/writable nonvolatile memory, and a controller which manages one of respective physical storage areas of the storage medium and the nonvolatile memory as being a logical storage area and which, in response to an access request from an external source, executes access to either one or both of the storage medium and the nonvolatile memory.
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Citations
12 Claims
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1. A storage device, comprising:
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a data-readable/writable storage medium; a data-readable/writable nonvolatile memory; and a controller configured to manage one of respective physical storage areas of the storage medium and the nonvolatile memory as a logical storage area and, in response to an access request from an external source, the controller executes access to either one or both of the storage medium and the nonvolatile memory, wherein when a write request for data from an external source is present, the controller performs computation of time necessary for a write of the data to the storage medium, and executes the write to the nonvolatile memory if the computation result is greater than or equal to a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An information processing system, comprising:
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an information processing unit; and a storage device connectable to the information processing unit, the information processing unit being capable of making a data access request to the storage device, and the storage device including; a data-readable/writable storage medium, a data-readable/writable nonvolatile memory, and a controller configured to manage one of respective physical storage areas of the storage medium and the nonvolatile memory as a logical storage area and, in response to the access request from the information processing unit, the controller executes access to either one or both of the storage medium and the nonvolatile memory, wherein when a write request for data from an external source is present, the controller performs computation of time necessary for a write of the data to the storage medium, and executes the write to the nonvolatile memory if the computation result is greater than or equal to a predetermined value. - View Dependent Claims (9, 10, 11, 12)
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Specification