Patent ID: 7761684
Filing Date: 2010-07-20
Classification: G06F

Abstract:
1. A storage system connected to a computer and a management computer, comprising: storage devices accessed by the computer; and a control unit for controlling the storage devices, wherein a first-type logical device that is a storage area corresponding to a storage area set in at least one of the storage devices and includes a first first-type logical device and a second first-type logical device different in a characteristic, and a second-type logical device that is a virtual storage area are provided, and wherein the control unit: sets at least two of the first-type logical devices as storage areas included in a storage pool through mapping; sets the first-type logical device to be able to store data by not allocating a storage area of the second-type logical device to a storage area of the first first-type logical device first and, when the storage pool is accessed, allocating the storage area of the second-type logical device to the storage area of the first-type logical device in a pool slot mapped to the storage pool if the second-type logical device is not allocated in response to access to the second-type logical device from the computer; sets the second-type logical device to be accessible by the computer if the storage area of the second type logical device is allocated in response to access to the second-type logical device from the computer; changes the access characteristic of the second-type logical device by changing the allocated storage area of the second-type logical device to a storage area of the second first-type logical device.