Patent ID: 8949562
Filing Date: 2015-02-03
Classification: G06F

Abstract:
1. A storage system comprising: a first physical storage apparatus providing a first real volume; and a second physical storage apparatus providing a second real volume to form a copy pair with the first real volume, wherein the first physical storage apparatus and the second physical storage apparatus reside on different networks respectively, the first physical storage apparatus provides a first host with a first storage identifier and a first virtual volume identifier for the first host to access the first real volume; wherein the second physical storage apparatus provides a second host with at least a part of a first virtual storage apparatus including a first virtual volume assigned to the second real volume; wherein the second physical storage apparatus assigns the first virtual volume identifier to the first virtual volume and the first storage identifier to the first virtual storage apparatus; and wherein the second physical storage apparatus provides the second host with the first storage identifier and the first virtual volume identifier for the second host to access the second real volume via the first virtual volume.