Data-duplication control apparatus
First Claim
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1. A data-duplication control apparatus that controls a duplication process for duplicating data stored in a storage device that constitutes redundant-array-of-independent-disks, the data-duplication control apparatus comprising:
- an information storing unit that stores information on a level of the redundant-array-of-independent-disks of the storage device;
a failure-sign detecting unit that detects a sign of a failure with respect to the storage device;
a duplication-source-device selecting unit that selects a storage device of a duplication source based on the information stored; and
a data reading unit that reads data stored in a storage device, whereinwhen the storage device belongs to a level of the redundant-array-of-independent-disks in which same data is stored in a plurality of storage devices, and when an access regarding to readout of data stored in the storage device has been issued, the duplication-source-device selecting unit selects the storage device from which the sign of a failure has been detected as the duplication source from among the storage devices that store the same data, andthe data reading unit reads the data from a storage device from which no sign of a failure has been detected.
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Abstract
A data-duplication control apparatus that controls a duplication process for duplicating data stored in a storage device that constitutes redundant-array-of-independent-disks includes an information storing unit that stores information on a type of the redundant-array-of-independent-disks of the storage device; and a duplication-source-device selecting unit that selects a storage device of a duplication source based on the information stored.
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Citations
13 Claims
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1. A data-duplication control apparatus that controls a duplication process for duplicating data stored in a storage device that constitutes redundant-array-of-independent-disks, the data-duplication control apparatus comprising:
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an information storing unit that stores information on a level of the redundant-array-of-independent-disks of the storage device; a failure-sign detecting unit that detects a sign of a failure with respect to the storage device; a duplication-source-device selecting unit that selects a storage device of a duplication source based on the information stored; and a data reading unit that reads data stored in a storage device, wherein when the storage device belongs to a level of the redundant-array-of-independent-disks in which same data is stored in a plurality of storage devices, and when an access regarding to readout of data stored in the storage device has been issued, the duplication-source-device selecting unit selects the storage device from which the sign of a failure has been detected as the duplication source from among the storage devices that store the same data, and the data reading unit reads the data from a storage device from which no sign of a failure has been detected. - View Dependent Claims (2, 3, 4)
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5. A data-duplication control method of controlling a duplication process for duplicating data stored in a storage device that constitutes redundant-array-of-independent-disks, the data-duplication control method comprising:
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storing information on a level of the redundant-array-of-independent-disks of the storage device; detecting a sign of a failure with respect to the storage device; selecting a storage device of a duplication source based on the information stored; and reading data stored in a storage device, wherein when the storage device belongs to a level of the redundant-array-of-independent-disks in which same data is stored in a plurality of storage devices, and when an access regarding to readout of data stored in the storage device has been issued, the selecting includes selecting the storage device from which the sign of a failure has been detected as the duplication source from among the storage devices that store the same data, and the reading includes reading the data from a storage device from which no sign of a failure has been detected. - View Dependent Claims (6, 7, 8)
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9. A computer-readable recording medium that stores a data-duplication control program for controlling a duplication process for duplicating data stored in a storage device that constitutes redundant-array-of-independent-disks, wherein the data-duplication control program makes a computer execute
storing information on a level of the redundant-array-of-independent-disks of the storage device; -
detecting a sign of a failure with respect to the storage device; selecting a storage device of a duplication source based on the information stored; and reading data stored in a storage device, wherein when the storage device belongs to a level of the redundant-array-of-independent-disks in which same data is stored in a plurality of storage devices, and when an access regarding to readout of data stored in the storage device has been issued, the selecting includes selecting the storage device from which the sign of a failure has been detected as the duplication source from among the storage devices that store the same data, and the reading includes reading the data from a storage device from which no sign of a failure has been detected. - View Dependent Claims (10, 11, 12)
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13. A method, comprising:
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storing information on a level of redundant-array-of-independent-disks RAIDs; detecting a sign of a failure with respect to a RAID; reading data stored in the RAID; and when, based on the stored RAID level information, the RAID belongs to a level of RAID in which same data is stored in a plurality of disks and upon the reading of the data stored in the RAID, selecting from among the disks that store the same data a disk for which the sign of a failure has been detected as the duplication source, and reading the data from a disk from which no sign of a failure has been detected.
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Specification