A method, apparatus, system, and computer program product for restoring data. The restoring of the data to a storage system from a storage medium is initiated by a computer system. Changes to an amount of space available in the storage system to restore the data are identifies by the computer system, while the data is being restored to the storage system. A restoring of the data to the storage system is placed on hold by the computer system when an amount of space needed to complete restoring the data is greater than the amount of space available to restore the data.