As a part of QUICKCOPY initial processing, XRC must issue a reserve for the primary volume. After the tracks that contain the allocated space for the volume have been identified, XRC issues a release during the initial phase synchronization phase. If access to the primary volume is through a channel extender and the connection to the primary volume is lost while XRC has the reserve, XRC will not be able to release the volume. Applications then will not be able to access the primary volume.