1. A physical storage device comprising: a first data set written to a first emulated storage device, wherein the first data set includes a first section of data; and a second data set written to a second emulated storage device, wherein the second data set includes the first section of data, and wherein the first section of data is written to a storage location on the physical storage device that is shared by the first and second emulated storage devices, wherein the physical storage device is organized according to a common store data layout, and wherein the storage location corresponds to a portion of a common store extent, said common store extend including a plurality of common store units.