Patent ID: 8261031

Claim:
A management device that manages data migration between normal and virtual volumes in a storage system in which the normal and virtual volumes coexist as types of volumes for reading and writing data, the normal volumes being volumes to which existing physical storage areas are allocated in advance and the virtual volumes being volumes to which existing physical storage areas are dynamically allocated according to use status from a storage pool shared with the virtual volumes, the management device comprising: a display unit that displays information; and a control unit that collects information regarding the volumes, and based on the collected information, causes the display unit to separately display, simultaneously for both the normal volumes and the virtual volumes, at least a total logical capacity of the normal volumes and a total logical capacity of the virtual volumes, wherein each of the total logical capacities is a summation of logical capacities that include a capacity unallocated yet; wherein based on collected information on each volume, for each volume belonging to a volume group that is specified as a data migration source, the control unit sets a pair with the volume as the data migration source and any of the volumes belonging to a volume group specified as the data migration destination as the data migration destination, and displays information regarding each of the set pairs on the display unit; and wherein the control unit preferentially sets volumes of a same volume type as the pairs, and preferentially displays information related to the pairs on the display unit over other pairs.