STORAGE SYSTEM FOR A STORAGE POOL AND VIRTUAL VOLUMES
First Claim
1. A storage system coupled to a host computer and a management apparatus, comprising:
- a plurality of storage devices accessed by the host computer; and
a control unit that controls the plurality of storage devices,wherein the control unit;
sets a first-type virtual device corresponding to the plurality of storage devices, the first-type virtual device including a plurality of first-type logical devices,wherein the plurality of first-type logical devices includes at least one first first-type logical device and at least one second first-type logical device, the at least one first first-type logical device being allocated to a volume accessible by the host computer;
sets a second-type virtual device including a second-type logical device, which is a virtual volume accessible by the host computer; and
allocates each second first-type logical device, of the plurality of first-type logical devices, to a storage pool, andwherein when the control unit receives first write data for the first first-type logical device included in the first-type virtual device, the control unit stores the first write data in the first first-type logical device, and when the control unit receives second write data for the second-type logical device included in the second-type virtual device, the control unit associates at least one second first-type logical device, of the first-type virtual device and allocated to the storage pool, with the second-type logical device, and stores the second write data in the second first-type logical device.
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Abstract
This invention provides a storage system to store data used by computers. A storage system coupled to a computer and a management apparatus, includes storage devices accessed by the computer and a control unit that controls the storage devices, in which the control unit performs the following operations: setting, in the storage devices, a first virtual device including a first logical device; setting a second virtual device which including a second logical device, which is a virtual volume accessed by the computer; allocating an address of the first logical device to the second logical device; and changing the allocation to change storage areas of the virtual volume.
21 Citations
20 Claims
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1. A storage system coupled to a host computer and a management apparatus, comprising:
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a plurality of storage devices accessed by the host computer; and a control unit that controls the plurality of storage devices, wherein the control unit; sets a first-type virtual device corresponding to the plurality of storage devices, the first-type virtual device including a plurality of first-type logical devices, wherein the plurality of first-type logical devices includes at least one first first-type logical device and at least one second first-type logical device, the at least one first first-type logical device being allocated to a volume accessible by the host computer; sets a second-type virtual device including a second-type logical device, which is a virtual volume accessible by the host computer; and allocates each second first-type logical device, of the plurality of first-type logical devices, to a storage pool, and wherein when the control unit receives first write data for the first first-type logical device included in the first-type virtual device, the control unit stores the first write data in the first first-type logical device, and when the control unit receives second write data for the second-type logical device included in the second-type virtual device, the control unit associates at least one second first-type logical device, of the first-type virtual device and allocated to the storage pool, with the second-type logical device, and stores the second write data in the second first-type logical device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of changing configuration of a storage system connected to a host computer and a management apparatus, the storage system comprising a plurality of storage devices accessed by the host computer and a control unit that controls the storage system, the method comprising:
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a first step of setting a first-type virtual device, which includes a plurality of first-type logical devices, and corresponds to the plurality of storage devices, wherein the plurality of first type logical devices includes at least one first first-type logical device and at least one second first-type logical device, the at least one first first-type logical device being allocated to a volume accessible by the host computer; setting a second-type virtual device including a second-type logical device, which is a virtual volume accessed by the host computer; and allocating each second first-type logical device, of the plurality of first-type logical devices, to a storage pool, wherein when the control unit receives first write data for the first first-type logical device included in the first-type virtual device, the control unit stores the first write data in the first first-type logical device, and wherein when the control unit receives second write data for the second-type logical device included in the second-type virtual device, the control unit associates at least one second first-type logical device, of the first-type virtual device allocated to the storage pool, with the second-type logical device; and storing the second write data in the second first-type logical device. - View Dependent Claims (20)
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Specification