Abstract: A storage apparatus comprises a controller. Another storage apparatus including a first communication port is coupled to a network, and a first identification number with which a server accesses a first storage area is set in the first communication port. A second communication port in the storage apparatus is closed when the storage apparatus is in a standby state. The controller controls access to the second storage area by opening the second communication port in a case where an operation of the other storage apparatus stops and the storage apparatus transitions to the active state, using the first identification number, and execute diagnosis of the second communication port by changing the first identification number to a second identification number and opening the second communication port in a case where the diagnosis is executed when the storage apparatus is in the standby state.

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 storage control apparatus includes a memory and a processor. The memory stores selection condition information relating to a selection condition for storage devices to construct a RAID, group information relating to groups to which the storage devices belong, and connection information indicating a connection configuration of the storage devices. The processor is configured to perform a procedure including: selecting the storage devices that match the selection condition information; extracting groups to which the selected storage devices belong based on the group information; assigning group priorities, which indicate selection priorities in units of the groups of the storage devices, to the extracted groups based on the connection information; and selecting one storage device from each of the extracted groups in accordance with the group priorities until a predetermined number of storage devices have been selected.

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 storage control apparatus includes a memory and a processor. The memory stores selection condition information relating to a selection condition for storage devices to construct a RAID, group information relating to groups to which the storage devices belong, and connection information indicating a connection configuration of the storage devices. The processor is configured to perform a procedure including: selecting the storage devices that match the selection condition information; extracting groups to which the selected storage devices belong based on the group information; assigning group priorities, which indicate selection priorities in units of the groups of the storage devices, to the extracted groups based on the connection information; and selecting one storage device from each of the extracted groups in accordance with the group priorities until a predetermined number of storage devices have been selected.

Abstract: A storage system that functions as one or more logical volumes includes a control unit and a plurality of storage units connected to the control unit, wherein the control unit includes a memory that stores allocation status information that indicates status of allocation of the plurality of storage units to a logical volume; an access request responding unit that controls at least one storage unit among the plurality of storage units in response to a request for access to each logical volume from a host device; and a power saving controller that identifies an unused storage unit not allocated to any logical volume among the plurality of storage units on the basis of the allocation status information and performs power saving control on the identified unused storage unit.

Abstract: A connection apparatus interposed between a storage device including at least one storage section and a plurality of controllers for controlling the storage device, the connection apparatus includes a notification section that transfers, when a notification indicating occurrence of a state variation relating to the storage section is received from the storage device, the notification to at least one of the controllers, a monitoring section that monitors access from the at least one of the controllers, to which the notification has been transferred, to the storage device through the connection apparatus, and a notification controlling section that changes over, when it is detected by the monitoring section that the access has been terminated, a transfer destination of the notification by the notification section to one or more of the controllers to which the notification has not been transferred.

Abstract: According to an aspect of an embodiment, a disk drive diagnosis apparatus is included in a RAID system in which a RAID control unit and a drive enclosure that encloses a disk drive are interconnected via a fabric switch. The apparatus comprises a virtual login processing unit configured to virtually execute a login process for a fabric switch of a disk drive and a control unit configured to notify the RAID control unit of a result of the virtual login process and disconnect from a connection line for the RAID control unit a disk drive that has not normally performed the virtual login process relative to the drive enclosure.

Abstract: A storage system that functions as one or more logical volumes includes a control unit and a plurality of storage units connected to the control unit, wherein the control unit includes a memory that stores allocation status information that indicates status of allocation of the plurality of storage units to a logical volume; an access request responding unit that controls at least one storage unit among the plurality of storage units in response to a request for access to each logical volume from a host device; and a power saving controller that identifies an unused storage unit not allocated to any logical volume among the plurality of storage units on the basis of the allocation status information and performs power saving control on the identified unused storage unit.

Abstract: A relay device includes a processor that executes a procedure. The procedure includes detecting a change in a first communication state between a local device and a first relay device that is arranged in a stage preceding or succeeding the local device and connected to the local device with a logical path, obtaining, from a second relay device for relaying a logical path different from the logical path relayed by the local device, a second communication state between the second relay device and a third relay device that is arranged in a stage preceding or succeeding the second relay device and connected to the second relay device with a logical path, and enabling a logical path between the local device and the second relay device according to a combination of the first and the second communication states when the change in the first communication state is detected.

Abstract: A storage expander apparatus for accessing storage units includes first interfaces for accessing the storage units, a second interface for accessing subordinate expander apparatus, and a processor for executing receiving from an external apparatus a first request for obtaining first information indicative of a state of a connection of the storage expander apparatus, transmitting a second request for obtaining second information indicative of a state of a connection of the subordinate expander apparatus, measuring an elapsing time that has elapsed since transmitting the second request, storing a first response corresponding to the second request upon receiving the first response, starting a process for obtaining third information indicative of a state of a connection to be connected with the first interfaces upon the elapsing time exceeding a predetermined time, and transmitting a second response including the third information to the external apparatus upon receiving the third response.

Abstract: An access control apparatus which establishes a connection based on connection establishment requests from connected devices and controls accesses to a connection target device. The access control apparatus includes a connection information managing unit which manages connect wait conditions to the connection target device of the connected devices based on criterion information in a connection request transmitted from the connected devices and determination for selecting one connected device from the connected devices. The access control apparatus includes a selecting unit which selects one of the connected devices which has a delay tendency related to connection based on adjustment information which is set in accordance with the connect wait conditions of the connected devices and increases a delay tendency in connection of the connected device, and a determining unit which determines the connected device selected by the selecting unit as one to be connected to the connection target device.

Abstract: A connection apparatus interposed between a storage device including at least one storage section and a plurality of controllers for controlling the storage device, the connection apparatus includes a notification section that transfers, when a notification indicating occurrence of a state variation relating to the storage section is received from the storage device, the notification to at least one of the controllers, a monitoring section that monitors access from the at least one of the controllers, to which the notification has been transferred, to the storage device through the connection apparatus, and a notification controlling section that changes over, when it is detected by the monitoring section that the access has been terminated, a transfer destination of the notification by the notification section to one or more of the controllers to which the notification has not been transferred.

Abstract: A connection expansion device connected to devices includes a plurality of ports to which devices are connected, a storage unit configured to record device information obtained from each port, and a processing unit configured to specify, based on the device information, a port in which an abnormal device exists, invalidate device information belonging to the port, and cause the storage unit to hold device information of a normal device.

Abstract: A relay apparatus includes a storing unit configured to store information related to a connection state between the relay apparatus and a device connected thereto, a determining unit configured to determine whether a change is a temporary change, based on a change factor responsible for the change in the connection state, in a case in which the change occurs in the connection state between the relay apparatus and the connected device. The relay apparatus includes a notifying unit configured to discontinue notifying a higher level apparatus of the change in the connection state when it is determined by the determining unit that the change in the connection state is a temporary change, and notify the higher level apparatus of the change in the connection state when it is determined by the determining unit that the change in the connection state is not a temporary change.

Abstract: An access control apparatus which establishes a connection based on connection establishment requests from connected devices and controls accesses to a connection target device. The access control apparatus includes a connection information managing unit which manages connect wait conditions to the connection target device of the connected devices based on criterion information in a connection request transmitted from the connected devices and determination for selecting one connected device from the connected devices. The access control apparatus includes a selecting unit which selects one of the connected devices which has a delay tendency related to connection based on adjustment information which is set in accordance with the connect wait conditions of the connected devices and increases a delay tendency in connection of the connected device, and a determining unit which determines the connected device selected by the selecting unit as one to be connected to the connection target device.

Abstract: A storage expander apparatus for accessing storage units includes first interfaces for accessing the storage units, a second interface for accessing subordinate expander apparatus, and a processor for executing receiving from an external apparatus a first request for obtaining first information indicative of a state of a connection of the storage expander apparatus, transmitting a second request for obtaining second information indicative of a state of a connection of the subordinate expander apparatus, measuring an elapsing time that has elapsed since transmitting the second request, storing a first response corresponding to the second request upon receiving the first response, starting a process for obtaining third information indicative of a state of a connection to be connected with the first interfaces upon the elapsing time exceeding a predetermined time, and transmitting a second response including the third information to the external apparatus upon receiving the third response.

Abstract: A connection expansion device connected to devices includes a plurality of ports to which devices are connected, a storage unit configured to record device information obtained from each port, and a processing unit configured to specify, based on the device information, a port in which an abnormal device exists, invalidate device information belonging to the port, and cause the storage unit to hold device information of a normal device.

Abstract: A storage apparatus and method are provided. The storage apparatus including includes a basic storage device having a control unit and an add-on storage device configured to be connected to the basic storage device. The add-on storage device including a first request receiving unit receiving a first operation stop request output from the basic storage device to the add-on storage device second request receiving unit receiving a second operation stop request different from the first operation stop request, communication monitoring unit monitoring communication from the basic storage device, and operation stop processing unit performing processing for stopping the operation of the add-on storage device. The operation stop processing unit determines the validity of the second operation stop request on the basis of a monitoring result obtained by the communication monitoring unit, and stops the operation of the add-on storage device.