Device and method of copying data between disks having equal or different rotational rates

摘要

A data copying device that copies data stored in a first data storage device to a second data storage device is disclosed. The data copying device includes a data reading unit that reads data that has an amount determined based on a number of a plurality of logical volumes included in the first data storage device storing the data to be copied and an amount of data to be transferred from each of the logical volumes, a storage unit that stores the data read by the data reading unit, and a data transfer unit that transfers the data stored in the storage unit to the second storage device.