Abstract: A control device includes a first and a second control devices, the first control device is configured to transmit second data to the second control device at a first time, receive a first notification from the second control device at a second time, transmit the second data to a storage device at a third time, receive a second notification from the storage device at a fourth time, select a first or a second mode based on a comparison of the first period from the first time to the second time and the second period from the third time to the fourth time, in the first mode, transmit the first data to the second control device and the storage device, receive the first notification, transmit a processing completion notification, in the second mode, transmit the first data to the storage device, receive the second notification, transmit the processing completion notification.

Abstract: A storage controller includes a reconstruction unit that reconstructs data of a storage device to be restored among the plurality of storage devices by using data read from redundant storage devices other than the storage device to be restored among the plurality of storage devices, and stores the reconstructed data into a first backup storage device among the plurality of backup storage devices, and a copy unit that copies the data read from the redundant storage devices into second backup storage devices assigned to the redundant storage devices from among the plurality of backup storage devices during reconstruction by the reconstruction unit.

Abstract: A storage control apparatus is provided that includes a storage unit and a control unit. The storage unit is configured to store management information indicating a formatting status of each of a plurality of partitions included in a storage area. The control unit is configured to perform a procedure including: upon receiving a write request to write first data to the storage area, determining whether a partition including a region to which the first data is to be written is formatted, based on the management information; and when the partition is unformatted, generating third data with a size that matches a size of the partition by combining the first data and predetermined second data, and writing the third data to the partition.

Abstract: A storage control device includes a processor. The processor is configured to acquire history information on access to multiple logical volumes which are configured using multiple storage devices. The processor is configured to determine from among the multiple logical volumes, on basis of the acquired history information, a preferred logical volume on which restoration processing is preferentially performed. The processor is configured to restore the preferred logical volume stored in a first storage device to be restored among the multiple storage devices into a spare storage device other than the multiple storage devices using restoration data read from the multiple storage devices except for the first storage device.

Abstract: A storage controller includes a reconstruction unit that reconstructs data of a storage device to be restored among the plurality of storage devices by using data read from redundant storage devices other than the storage device to be restored among the plurality of storage devices, and stores the reconstructed data into a first backup storage device among the plurality of backup storage devices, and a copy unit that copies the data read from the redundant storage devices into second backup storage devices assigned to the redundant storage devices from among the plurality of backup storage devices during reconstruction by the reconstruction unit.

Abstract: According to an aspect of the present invention, provided is a storage control device including a processor. The processor monitors a load value of a first storage device or a second storage device during copy processing in which a copy of data stored in the first storage device is stored in the second storage device. The processor controls, in a case where the load value exceeds a predetermined threshold, the first storage device and the second storage device so that input/output processing to/from the second storage device is executed with priority over the copy processing.

Abstract: A controller includes a memory that stores a program, and a processor that executes, based on the program, a procedure comprising, recording migration data from a source to a destination assigned to a plurality of storages based on information for indicating a position of a recording area which is between areas in which data is recorded in units of blocks, receiving a request to release at least one of the plurality of storages during data migration and migrating recorded data recorded in the at least one of the plurality of storages to other recording area formed in other storages of the plurality of storages, and releasing the at least one of the plurality of storages after migrating the recorded data.

Abstract: An NFS server, an NFS server control program and an NFS control method can reduce the extended lock reacquisition period. The NFS server comprises a prior-to-restart lock acquiring client information recording section for recording the identifiers of the NFS clients that have acquired locks before a restart of the NFS server and the number of the first files that is the number of files for which locks have been acquired, a lock acquiring client information recording section for recording the identifiers of the NFS clients that have reacquired locks after the restart of the NFS server and the number of the second files that is the number of files for which lock have been reacquired and an NSM that ends the reception of any lock reacquisition request from any of the NFS clients when the number of the second files of all the NFS clients acquired by the prior-to-restart lock acquiring client information recording section becomes equal to the number of the first files.

Abstract: A first storing unit stores therein information on a communication status relating to installing positions of a plurality of storage devices forming a disk array. A selecting unit selects a plurality of storage devices for storing data, based on stored information. A second storing unit stores recovery data recovered from a storage device from which a failure is detected from among the storage devices forming the disk array in selected storage devices in a striping manner.

Abstract: A first storing unit stores therein information on a communication status relating to installing positions of a plurality of storage devices forming a disk array. A selecting unit selects a plurality of storage devices for storing data, based on stored information. A second storing unit stores recovery data recovered from a storage device from which a failure is detected from among the storage devices forming the disk array in selected storage devices in a striping manner.

Abstract: An NFS server, an NFS server control program and an NFS control method can reduce the extended lock reacquisition period. The NFS server comprises a prior-to-restart lock acquiring client information recording section for recording the identifiers of the NFS clients that have acquired locks before a restart of the NFS server and the number of the first files that is the number of files for which locks have been acquired, a lock acquiring client information recording section for recording the identifiers of the NFS clients that have reacquired locks after the restart of the NFS server and the number of the second files that is the number of files for which lock have been reacquired and an NSM that ends the reception of any lock reacquisition request from any of the NFS clients when the number of the second files of all the NFS clients acquired by the prior-to-restart lock acquiring client information recording section becomes equal to the number of the first files.