STORAGE SYSTEM AND DATA CONTROL METHOD
First Claim
1. A storage system comprising:
- a first storage device;
a second storage device with a smaller upper limit number of writes and a larger storage capacity per unit area than those of the first storage device; and
a processor that allocates storage areas from the first storage device and the second storage device to a virtual volume to be provided to a host,wherein the processor relocates data which is stored in a storage area with higher write frequency from the host than a predetermined write threshold, from among the storage areas allocated from the second storage device to the virtual volume, from the storage area of the second storage device to a storage area of the first storage device.
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Accused Products
Abstract
A storage system and data control method capable of extending the service lifes of storage devices of the same type and with different properties and reducing operation management cost are proposed. The storage system includes: a first storage device; a second storage device with a smaller upper limit number of writes and a larger storage capacity per unit area than those of the first storage device; and a processor that allocates storage areas from the first storage device and the second storage device to a virtual volume to be provided to a host, wherein the processor relocates data which is stored in a storage area with higher write frequency from the host than a predetermined write threshold, from among the storage areas allocated from the second storage device to the virtual volume, from the storage area of the second storage device to a storage area of the first storage device.
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Citations
11 Claims
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1. A storage system comprising:
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a first storage device; a second storage device with a smaller upper limit number of writes and a larger storage capacity per unit area than those of the first storage device; and a processor that allocates storage areas from the first storage device and the second storage device to a virtual volume to be provided to a host, wherein the processor relocates data which is stored in a storage area with higher write frequency from the host than a predetermined write threshold, from among the storage areas allocated from the second storage device to the virtual volume, from the storage area of the second storage device to a storage area of the first storage device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A data control method for a storage system including:
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a first storage device; a second storage device with a smaller upper limit number of writes and a larger storage capacity per unit area than those of the first storage device; and a processor that allocates storage areas from the first storage device and the second storage device to a virtual volume to be provided to a host, the data control method comprising; a first step executed by the processor relocating data which is stored in a storage area with higher write frequency from the host than a predetermined write threshold, from among the storage areas allocated from the second storage device to the virtual volume, from the storage area of the second storage device to a storage area of the first storage device; a second step executed by the processor relocating data which is stored in a storage area with write frequency from the host equal to or lower than the write threshold, from among the storage areas allocated from the first storage device to the virtual volume, from the storage area of the first storage device to a storage area of the second storage device.
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Specification