Patent ID: 8433686
Filing Date: 2013-04-30
Classification: G06F,Y10S

Abstract:
1. A storage system, comprising: a first type storage device; a second type storage device, a reliability attribute and/or a performance attribute of the second type storage device being different from a reliability attribute and/or a performance attribute of the first type storage device; a cache memory temporarily storing data to be stored to the first type storage device and the second type storage device; and a control unit managing a virtual volume, a first portion of the virtual volume corresponding to a first storage area of the first type storage device, a second portion of the virtual volume corresponding to a second storage area of the second type storage device, wherein in response to receiving a read request to the first portion of the virtual volume, the control unit reads data stored in the first storage area of the first type storage device, wherein in response to receiving a read request to the second portion of the virtual volume, the control unit reads data stored in the second storage area of the second type storage device.