Patent ID: 7418563
Filing Date: 2008-08-26
Classification: G06F,Y10S

Abstract:
1. A system including a plurality of storage controllers and a plurality of storage devices comprising: a first storage controller of the storage controllers operatively coupled to an information processing apparatus and configuring a plurality of first volumes; and a second storage controller of the storage controllers configuring a plurality of second volumes; wherein the first and second storage controllers form a consistency group with the first volumes and the second volumes, wherein the first storage controller starts to split a plurality of pairs of paired volumes in the consistency group upon receiving a group split command, created by the information processing apparatus, for the consistency group, and wherein the first storage controller suppresses an execution of a write request, addressed to a volume in the consistency group and received from the information processing apparatus after receiving the group split command, until a completion of splitting the pairs of the paired volumes in the consistency group.