Abstract: The data duplication system comprises a first storage device having a first data protection area for storing backup images of multiple generations of a first volume for data read/write by an external device. The first data protection area is inaccessible to the external device. A second storage device coupled to the first storage device. The first storage device creates a second volume for storing a backup image of a particular generation of the plurality of generations of backup images stored in the first data protection area. The second storage device creates a third volume for storing the copy data, and a virtual volume that is mapped to the second volume of the first storage device. The second storage stores the backup data of a specific generation stored in the second volume in the third volume via the virtual volume by forming a pair that copies the data in the virtual volume and the third volume.

Abstract: The data duplication system comprises a first storage device having a first data protection area for storing backup images of multiple generations of a first volume for data read/write by an external device. The first data protection area is inaccessible to the external device. A second storage device coupled to the first storage device. The first storage device creates a second volume for storing a backup image of a particular generation of the plurality of generations of backup images stored in the first data protection area. The second storage device creates a third volume for storing the copy data, and a virtual volume that is mapped to the second volume of the first storage device. The second storage stores the backup data of a specific generation stored in the second volume in the third volume via the virtual volume by forming a pair that copies the data in the virtual volume and the third volume.

Abstract: Backup data equivalent to the maximum number of generations to be held can be secured even when backup data is locked. When locking of prohibiting overwrite of one or more storage areas is performed, a backup server prepares a new backup management table and uses the backup management table and an archive management table, which is the past backup management table, to store the backup data equivalent to the maximum number of generations to be held into a storage system.

Abstract: Backup data equivalent to the maximum number of generations to be held can be secured even when backup data is locked. When locking of prohibiting overwrite of one or more storage areas is performed, a backup server prepares a new backup management table and uses the backup management table and an archive management table, which is the past backup management table, to store the backup data equivalent to the maximum number of generations to be held into a storage system.

Abstract: A device for generating a sterilizing gas includes a methanol gas generation device (11) for vaporizing methanol to generate a methanol gas, a tubular part (12) and a catalyst section (13). The tubular section (12) is arranged on top of the methanol gas generation device (11) to provide a flow path for upwardly directing the methanol gas generated by the methanol gas generation device by natural convection. The tubular section also operates to mix the methanol gas with a predetermined proportion of air. The catalyst section (13) is arranged on top of the tubular section (12) for turning the methanol gas mixed with the air at the predetermined proportion in the tubular section (12) into radicals by a catalyzed reaction. The catalyst section (13) is formed by a turn-into-radical reaction catalyst layer (30) obtained on forming a thin metal sheet (35a) to a honeycomb structure.

Abstract: A device for generating a sterilizing gas includes a methanol gas generation device (11) for vaporizing methanol to generate a methanol gas, a tubular part (12) and a catalyst section (13). The tubular section (12) is arranged on top of the methanol gas generation device (11) to provide a flow path for upwardly directing the methanol gas generated by the methanol gas generation device by natural convection. The tubular section also operates to mix the methanol gas with a predetermined proportion of air. The catalyst section (13) is arranged on top of the tubular section (12) for turning the methanol gas mixed with the air at the predetermined proportion in the tubular section (12) into radicals by a catalyzed reaction. The catalyst section (13) is formed by a turn-into-radical reaction catalyst layer (30) obtained on forming a thin metal sheet (35a) to a honeycomb structure.