Abstract: Upon receiving, from application software, a first request for writing data stored in a first storage-region of the application software, an apparatus acquires a second storage-region, and copies the data to the second storage-region. The apparatus transmits, to one of drivers associated with each of redundant storage-devices on which mirroring is to be performed, a second request for writing the copied data to the each redundant storage-device, transmits, to the application software, a response indicating that writing of the data has been successfully performed in a case where a data-writing process for at least one of the redundant storage-devices is completed when a predetermined time has elapsed after the second request is transmitted to the drivers and before a retry-over time at which retry of the data-writing process is performed predetermined times, and excludes, from the redundant storage-devices, a storage-device for which the data-writing process is not completed.

Abstract: Upon receiving, from application software, a first request for writing data stored in a first storage-region of the application software, an apparatus acquires a second storage-region, and copies the data to the second storage-region. The apparatus transmits, to one of drivers associated with each of redundant storage-devices on which mirroring is to be performed, a second request for writing the copied data to the each redundant storage-device, transmits, to the application software, a response indicating that writing of the data has been successfully performed in a case where a data-writing process for at least one of the redundant storage-devices is completed when a predetermined time has elapsed after the second request is transmitted to the drivers and before a retry-over time at which retry of the data-writing process is performed predetermined times, and excludes, from the redundant storage-devices, a storage-device for which the data-writing process is not completed.

Abstract: An information processor coupled to a storage apparatus that stores information, includes: a creation unit configured to create a snapshot of a file system that manages first information stored in the storage apparatus and to output the snapshot to the storage apparatus; a writing unit configured to write second information stored in cache memory onto the storage apparatus after the snapshot has been created; and a replication instruction unit configured to instruct the storage apparatus to create a replication of the first information stored in the storage apparatus after the second information has been written and the snapshot.

Abstract: An information processor coupled to a storage apparatus that stores information, includes: a creation unit configured to create a snapshot of a file system that manages first information stored in the storage apparatus and to output the snapshot to the storage apparatus; a writing unit configured to write second information stored in cache memory onto the storage apparatus after the snapshot has been created; and a replication instruction unit configured to instruct the storage apparatus to create a replication of the first information stored in the storage apparatus after the second information has been written and the snapshot.