Patent ID: 7237078
Filing Date: 2007-06-26
Classification: G06F

Abstract:
1. A computer system comprising: a first and second computer; at least one first storage system connected to the first computer; and a plurality of second storage systems connected to the second computer as well as being connected to the at least one first storage system, wherein the at least one first storage system and the plurality of second storage systems each comprises at least N storage areas for storing data, N being an integer equal to 2 or greater, and there is established N copy pair composed of one storage area in the at least one first storage system and one storage area in the plurality of second storage systems, wherein the first computer comprises: the first storage system comprises: an update-data transmitter configured to transmit the received write request, as update-data, to the second storage system having a storage area that constitutes a copy pair with the storage area in the at least one first storage system indicated by the received write request, in such a way that the order in which the write requests are issued is ascertainable, the second storage system comprises: the second computer comprises: