Patent ID: 8380956

Claim:
A method for storing data of a logical device comprising: performing an operation to store first data to the logical device in accordance with a static policy, said logical device having data stored on a first physical device that is mirrored on a second physical device, wherein each of said first and second physical devices are defined to include a first storage area and a second storage area, said first storage area of said first physical device and said first storage area of said second physical device being corresponding physical portions each associated with a same first set of physical storage locations, said second storage area of said first physical device and said second storage area of said second physical device being corresponding physical portions each associated with a same second set of physical storage locations, said first storage areas of the first physical device and the second physical device providing better performance for accessing data than said second storage areas of the first physical device and the second physical device, said static policy indicating to service reads for logical devices using data stored in one of said first storage areas; storing said first data at a first location in one of the first storage areas of one of the first and the second physical devices; storing said first data at a second location in one of the second storage areas at the other of the first and the second physical devices; receiving a read operation to read said first data; and servicing said read operation in accordance with said static policy by accessing said first data stored in the first area of said one physical device.