Abstract: A storage control apparatus includes a memory unit configured to store assignment information that includes assignment states of memory areas of storage units in a system in which switches that connect the storage units with storage control apparatuses that control the storage units are cascade-connected to each other; and a control unit configured to group the storage control apparatuses and the storage units directly connected to the switches, and to provide based on the assignment information, rearrangement control of memory areas assigned in the storage units belonging to each group.

Abstract: A control device, which controls access to the data stored in a memory device, includes a selector, a changing unit, a notification unit, and a power supply controller. When the number of accesses to a memory device is out of a range of a predetermined threshold, the selector selects a piece of data from pieces of data controlled by the control device itself or another control device. The changing unit changes a control device for controlling access to the selected a piece of data. The notification unit notifies an information processing device of a control device after changed and the selected a piece of data to be controlled by the control device after changed. The power supply controller controls a power supply of the control device after changed or a power supply of a control device that has controlled access to the selected a piece of data.

Abstract: A storage controller selecting system includes a time information storage unit, a receiver, and a processor. The time information storage unit is configured to store internal processing time information for each of a plurality of storage controllers. The internal processing time information for each individual storage controller relates to an internal processing time taken for processing performed within the individual storage controller in response to an access request to a logical volume. The receiver is configured to receive a creation request for requesting creation of a new logical volume. The processor is configured to select a certain storage controller from among the plurality of storage controllers according to the internal processing time information, and to cause the certain storage controller to create the new logical volume.

Abstract: A storage control apparatus includes a memory unit configured to store assignment information that includes assignment states of memory areas of storage units in a system in which switches that connect the storage units with storage control apparatuses that control the storage units are cascade-connected to each other; and a control unit configured to group the storage control apparatuses and the storage units directly connected to the switches, and to provide based on the assignment information, rearrangement control of memory areas assigned in the storage units belonging to each group.

Abstract: A storage controller selecting system includes a time information storage unit, a receiver, and a processor. The time information storage unit is configured to store internal processing time information for each of a plurality of storage controllers. The internal processing time information for each individual storage controller relates to an internal processing time taken for processing performed within the individual storage controller in response to an access request to a logical volume. The receiver is configured to receive a creation request for requesting creation of a new logical volume. The processor is configured to select a certain storage controller from among the plurality of storage controllers according to the internal processing time information, and to cause the certain storage controller to create the new logical volume.

Abstract: A control device, which controls access to the data stored in a memory device, includes a selector, a changing unit, a notification unit, and a power supply controller. When the number of accesses to a memory device is out of a range of a predetermined threshold, the selector selects a piece of data from pieces of data controlled by the control device itself or another control device. The changing unit changes a control device for controlling access to the selected a piece of data. The notification unit notifies an information processing device of a control device after changed and the selected a piece of data to be controlled by the control device after changed. The power supply controller controls a power supply of the control device after changed or a power supply of a control device that has controlled access to the selected a piece of data.