Patent ID: 8516209
Filing Date: 2013-08-20
Classification: G06F

Abstract:
1. A computer system comprising: a storage apparatus; a host computer which accesses volumes provided by the storage apparatus; and a management computer, wherein: the host computer executes a control program and a guest OS running on the control program; the guest OS accesses one or more volumes allocated from the storage apparatus; the storage apparatus performs copy operations of the one or more volumes allocated to the guest OS; one of the host computer and the management computer executes a copy control program for controlling copy operations by the storage apparatus; the one of the host computer and the management computer, in accordance with the copy control program, obtains first information indicating at least a part of one or more volumes allocated to the guest OS at a given time from the control program; and the one of the computers, in accordance with the copy control program, compares the first information with second information indicating at least a part of one or more volumes having been allocated to the guest OS prior to the given time to check for a change in volume allocation to the guest OS and performs volume copy control for the guest OS in accordance with a result of the checking.