Patent ID: 8452933
Filing Date: 2013-05-28
Classification: G06F

Abstract:
1. A storage system comprising: a first storage system managing a first logical volume which relates to a storage area provided by a plurality of first drives in the first storage system; a second storage system coupled to the first storage system through a first network, and managing a second logical volume which is a virtual volume not consuming a storage area provided by a plurality of second drives in the second storage system; and a third storage system coupled to the second storage system through a second network, and managing a third logical volume related to a storage area provided by a plurality of third drives in the third storage system; wherein the first logical volume and the second logical volume form a first copy pair, and the second logical volume and the third logical volume form a second copy pair, wherein if the second storage system detects a failure occurring on the second network, the second storage system sends an instruction to the first storage system, the instruction instructing to stop transferring data written to the first logical volume to the second logical volume.