Patent ID: 9329795
Filing Date: 2016-05-03
CPC Classification: G06F,H04L

Claim Text:
1. A storage system comprising: a first storage device coupled to a computer via a first path, wherein the first storage device includes a first controller providing a first virtual volume and a second virtual volume; and a second storage device coupled to the computer via a second path, wherein the second storage device includes a second controller providing a third virtual volume and a fourth virtual volume, wherein the first virtual volume and the third virtual volume are recognized as the same volume by the computer, and the second virtual volume and the fourth virtual volume are recognized as the same volume by the computer, wherein the second controller is configured to: migrate the first virtual volume to the third virtual volume and migrate the second virtual volume to the fourth virtual volume, and notify to the first storage device that the first virtual volume and the second virtual volume are migrated and notify to the computer that the first virtual volume and the second virtual volume are migrated, such that the second path to the second storage device is set a priority over the first path by the computer, and wherein the first storage device and the second storage device are configured to be accessed by the computer on the basis of the priority.