Patent ID: 8605560

Claim:
A storage system comprising: plural drive devices each to read or write data from or to a portable recording medium; and a control device to perform a parallel process in which a first process and a second process are performed in parallel, the first process being to write specified data to a first portable recording medium via a first drive device of the plural drive devices, the second process being to write the specified data to a second portable recording medium via a second drive device of the plural drive devices, and cancel, upon completion of either one of the first process and the second process, the other one of the first process and the second process, wherein the control device determines to perform either one of the parallel process and the first process, based on a condition related to at least one of a use state of the plural drive devices and an attribute of the specified data, and the control device determines to perform the parallel process when a sum of numbers of available drive devices and suspendable drive devices both of the plural drive devices is two or more, the available drive devices performing neither reading data nor writing data, the suspendable drive devices performing a third process having lower priority than the parallel process.