Patent ID: 7412543
Filing Date: 2008-08-12
Classification: G06F

Abstract:
1. A first storage control apparatus adapted to be coupled to a plurality of storage control apparatuses, at least one of said plurality of storage control apparatuses including a plurality of storage devices and a data read/write control unit executing data read/write processes to said plurality of storage devices based on a Redundant Array of Independent Disks (RAID) scheme, said first storage control apparatus comprising: a control unit transmitting a request corresponding to a data write request or a data read request received from a host computer with reference to mapping information between a first Logical Unit Number (LUN), designated by said data write request or said data read request received from said host computer, and a second LUN of a logical volume from/to which a second storage control apparatus of said plurality of storage control apparatuses executes data read/write processes; wherein said control unit of said first storage control apparatus receives a predetermined copy command related to said first LUN and executes a copy process from said second storage control apparatus to a third storage control apparatus of said plurality of storage control apparatuses, the second storage control apparatus being unable to execute said predetermined copy command.