Storage system, storage apparatus, and control program

摘要

A storage system includes a storage apparatus having a first storage unit having first storage and a first storage control unit controlling access to the first storage, and a first control unit controlling storage units including the first storage unit; a second storage unit having second storage and a second storage control unit controlling access to the second storage; and a second control unit controlling storage units including the second storage unit. The second storage unit and second control unit are added to the storage apparatus. The first control unit includes a memory unit storing allocation information including an allocation state of storage areas of the first and second storage, and a processor configured to execute rearrangement control of an allocated storage area based on the allocation information corresponding to unevenness between a storage capacity of an allocated storage area in the first storage and that in the second storage.