Abstract: A control device configured to backup data updated in response to update requests issued by a plurality of host devices, includes a memory; and a processor configured to: record, in the memory, a reception interval and a last reception time of the update requests for each host device, compare an elapsed time from the last reception time to a certain timing and the reception interval at the certain timing for each host device, and start the backup according to a comparison result for each host device.

Abstract: A control device includes a processor configured to copy a part of data stored in a first volume to a second volume, copy whole data stored in the first volume to a destination volume, and receive a request to read first data stored in the second volume. The processor is configured to read the first data from the second volume when the first data has been partially copied to the second volume. The processor is configured to read, when the first data has not been partially copied to the second volume, the first data from the first volume on basis of association information associating the first volume with the second volume. The processor is configured to identify, upon failing to read the first data from the first volume, the equivalent volume on basis of recovery information related to the destination volume as an equivalent volume of the first volume.

Abstract: An information processing apparatus includes a memory, and a processor coupled to the memory and configured to set, in the memory, a first region having a first capacity, receive a first request which requests to change the first region to a second region having a second capacity greater than the first capacity, set, in the memory, the second region and a reserved region in response to the first request, and cancel a setting of the reserved region when a second request which requests to change the second region to a third region having a third capacity greater than the second capacity is not received within a first time period after the first request is received.

Abstract: A control device configured to backup data updated in response to update requests issued by a plurality of host devices, includes a memory; and a processor configured to: record, in the memory, a reception interval and a last reception time of the update requests for each host device, compare an elapsed time from the last reception time to a certain timing and the reception interval at the certain timing for each host device, and start the backup according to a comparison result for each host device.

Abstract: A monitoring device included a processor. The processor is configured to monitor a state of a first device. The processor is configured to receive an operation command input partway. The operation command is for operating the first device. The processor is configured to select, depending on the state of the first device, a prioritized completion candidate from among a plurality of completion candidates likely to be included in the operation command. The prioritized completion candidate is to be displayed in a display unit in priority to other completion candidates among the plurality of completion candidates. The processor is configured to output information regarding the prioritized completion candidate.

Abstract: A control device includes a processor configured to copy a part of data stored in a first volume to a second volume, copy whole data stored in the first volume to a destination volume, and receive a request to read first data stored in the second volume. The processor is configured to read the first data from the second volume when the first data has been partially copied to the second volume. The processor is configured to read, when the first data has not been partially copied to the second volume, the first data from the first volume on basis of association information associating the first volume with the second volume. The processor is configured to identify, upon failing to read the first data from the first volume, the equivalent volume on basis of recovery information related to the destination volume as an equivalent volume of the first volume.

Abstract: A control method executed by a first storage control apparatus comprises receiving, from the information processing apparatus, a request to change data stored in a storage unit provided in the first storage control apparatus so as to be synchronized to changed data, extracting address information, included in the request, that identifies an address at which data corresponding to the data to be synchronized has been stored in a storage unit provided in the second storage control apparatus, creating time information that identifies a time of the day at which the request was received, and transmitting a change request, which includes the extracted address information and the created time information, from the first storage control apparatus to the second storage control apparatus, the change request requesting the corresponding data stored in the second storage control apparatus to be changed to the changed data.

Abstract: A control method executed by a first storage control apparatus comprises receiving, from the information processing apparatus, a request to change data stored in a storage unit provided in the first storage control apparatus so as to be synchronized to changed data, extracting address information, included in the request, that identifies an address at which data corresponding to the data to be synchronized has been stored in a storage unit provided in the second storage control apparatus creating time information that identifies a time of the day at which the request was received, and transmitting a change request, which includes the extracted address information and the created time information, from the first storage control apparatus to the second storage control apparatus, the change request requesting the corresponding data stored in the second storage control apparatus to be changed to the changed data.

Abstract: In response to a resource allocation request which specifies an allocation destination group, a detection unit refers to a storage unit which stores information indicating resources having been individually allocated to one of multiple groups and information indicating whether each of the resources is in use. Subsequently, the detection unit detects an unused resource having been allocated to a group other than the allocation destination group. A setting unit makes a setting in the storage unit to cancel the allocation of the detected unused resource and reallocate the unused resource to the allocation destination group.