Management apparatus for managing storage apparatus

A management apparatus for a plurality of storage pools having a plurality of real storages grouped at each user and a virtual storage logically defined on the real storage in a storage apparatus, the storage apparatus having the plurality of real storages for existing physically and a plurality of controllers for individually controlling access to the respective real storages, the management apparatus comprising:

• an acquiring unit for acquiring information of specifying a target storage pool and a new storage capacity to be acquired from another storage pool other than the target storage pool, and
• a determining unit for determining the real storage to be transferred to the target storage pool from candidate one of the real storages in the another storage pool, which are under the control of the controller having a comparatively low access frequency in control of access to the real storages belonging to the target storage pool, on the basis of an occupied storage capacity defined as the virtual storage on the real storage and a free storage capacity of the real storage in the another pool.

A management apparatus for a plurality of storage pools having a plurality of real storages grouped at each user and a virtual storage logically defined on the real storage in a storage apparatus, the storage apparatus having the plurality of real storages for existing physically and a plurality of controllers for individually controlling access to the respective real storages, the management apparatus comprising:

• an acquiring unit for acquiring information of specifying a candidate real storage to be logically taken out from the plurality of the real storages in the storage apparatus;
• and
• a determining unit for making a comparison between the occupied storage capacity defined as the virtual storage on the candidate real storages and total of the free storage capacity not defined as the virtual storage in all the real storages, which are under the control of the controller in charge of control of access to the candidate real storage specified by the acquiring unit, in the storage pool belonging to the candidate real storage other than the candidate real storage, and for determining whether the candidate real storage can be logically taken out depending on whether the total of the empty storage capacities is not less than the occupied storage capacity.