Disclosed is a technique for processing interruption of an operation that transfers data between a source and a target. An indication that a reverse restore operation has been interrupted is received. It is determined whether designation of at least one of an original source and an original target has been reversed. The settings of one or more relation indicators are also determined. Processing to be performed is identified based on the determinations of whether designations have been reversed and based on the settings of the one or more relation indicators.