Patent ID: 7454591
Filing Date: 2008-11-18
Classification: G06F

Abstract:
1. A disk array system, coupled to another disk array system and a host computer, said disk array system comprising: a plurality of disk drives; a volume configured by some of said disk drives; and a controller controlling to receive data from said another disk array system with a remote copy procedure and to store said data in said volume, wherein said volume is related to a first Logical Unit Number (LUN), which is used to access said volume by said host computer, and a second LUN, which is used for receiving said data from said another disk array system and storing said data in said volume with said remote copy procedure, wherein when said remote copy procedure is to be performed as instructed by said host computer to copy data from said volume to another volume in said another disk array system, said host computer sends a LUN acquisition request to another host computer coupled to said another disk array system, wherein said host computer receives from said another host computer another second LUN which is used for receiving data from said disk array system and storing said data in said another volume of said another disk array system according to said remote copy procedure, wherein said host computer based on receipt of said another second LUN issues a copy command including said first LUN as a copy source and said another second LUN as a copy destination to said disk array system, and wherein said disk array system in response to said copy command from said host computer performs said remote copy procedure to copy data from said volume corresponding to said first LUN of said disk array system to said another volume of said another second LUN of said another disk array system.