Provided are computer program product, system, and method for using inactive copy relationships to resynchronize data among n storages referenced as storages 1 through n, wherein n is greater than or equal to three. n−1 active copy relationships are established. Each active copy relationship copies data from one of the storages 1 through n−1 as a source storage to one other of the storages 2 through n as a target storage respectively. At least one inactive copy relationship is established to copy data from one of the storages 1 through n−1 as the source storage to one other of the storages 2 through n as a target storage, such that the source and target storages in the inactive copy relationship are not both also in a same of at least one of the active copy relationships.