Patent ID: 7136975
Filing Date: 2006-11-14
Classification: G06F,H04L,Y10S

Abstract:
1. A storage system capable of transmitting data stored in a first storage control device to a third storage control device via a second storage control device, wherein said second storage control device comprises: a first virtual volume which is associated with a real volume and forms a pair with a copy source volume of said first storage control device; a second virtual volume which is associated with said real volume and forms a pair with a copy destination volume of said third storage control device; a first target port having the input side thereof connected to said copy source volume and the output side thereof connected to said first virtual volume; a first initiator port having the input side thereof connected to said first virtual volume; a second target port having the input side thereof connected to said first initiator port and the output side thereof connected to said second virtual volume; a second initiator port having the input side thereof connected to said second virtual volume and the output side thereof connected to said copy destination volume; a first control program for causing said first virtual volume to operate as an auxiliary volume of said copy source volume; a second control program for reflecting storage contents of said first virtual volume in storage contents of said second virtual volume; and a third control program for causing said second virtual volume to operate as the primary volume of said copy destination volume, and wherein said real volume is mapped to said second virtual volume, and said second virtual volume is mapped to said first virtual volume.