Patent ID: 7725776

Claim:
A method for displaying a state of a copy pair which is a pair of logical volumes belonging to one or a plurality of storage systems, comprising: transmitting a user request, which is a request complying with a designated operation performed on a host computer by a user, to a storage system by the host computer, the designated operation being a backup/restore operation for backing up or restoring data inside a logical volume in which data used by the host computer is stored; recording on a storage region of the storage system which receives the user request, user operation information acquired from the host computer, which is information related to the user request for the backup/restore operation, and changing in copy pair management information in which is recorded, for each copy pair, a subsystem pair state which is a pair state in the storage system, a subsystem pair state of a copy pair related to the user request to a subsystem pair state accompanied with the user request; distinguishing, by comparing the user operation information with the copy pair management information after update, a user-operated copy pair, which is in the subsystem pair state changed in accompany with the user request complying with user operation performed intentionally by the user, from a user-unoperated copy pair which is not in the subsystem pair state; displaying on a display device, on the basis of a result of the distinguishing, a pair state for display of the user-operated copy pair and a pair state for display of the user-unoperated copy pair in different display modes respectively; associating, an information element representing one or a plurality of types of subsystem elements of the storage system with the undated copy pair management information for each copy pair: acquiring error specifying information from the storage subsystem, for specifying an error occurrence area in the storage system, and detecting the error occurrence area in the storage system from the error specifying information; and specifying the user-unoperated copy pair, which is associated with the same subsystem element as the detected error occurrence area, from the undated copy pair management information, and displaying on the display device the pair states for display of one or more of the specified user-unoperated copy pair associated with the same error occurrence area, in units of the error occurrence area by changing a display format according to the unit of the error occurrence area.