Abstract: A method of communication through a network, executed by a communication apparatus that performs transmission by selecting a transmission mode, the method includes determining whether to transmit the data in either a first mode or a second mode when transmitting data; transmitting the data using a predetermined number of kinds of optical signals having different levels in light intensity when determined to transmit in the first mode; and transmitting the data using a fewer number of kinds of optical signals having different levels in light intensity than the predetermined number when determined to transmit in the second mode.

Abstract: There is provided a relay apparatus configured to relay data transmitted and received between a plurality of devices, the relay apparatus includes an input unit configured to receive inputting of device group information, a first device and a second device being registered in the device group information, data transmission and reception between the first device and the second device being allowed, a setting unit configured to detect devices connected to respective communication ports of the relay apparatus and to register, in port group information, information associated with the communication ports respectively connected to the first device and the second device when the first device and the second device are connected to the relay apparatus, and a communication control unit configured to enable transmission and reception of data between the communication ports registered in the port group information.

Abstract: A method of communication through a network, executed by a communication apparatus that performs transmission by selecting a transmission mode, the method includes determining whether to transmit the data in either a first mode or a second mode when transmitting data; transmitting the data using a predetermined number of kinds of optical signals having different levels in light intensity when determined to transmit in the first mode; and transmitting the data using a fewer number of kinds of optical signals having different levels in light intensity than the predetermined number when determined to transmit in the second mode.

Abstract: A monitoring device including: a receiving unit configured to receive a malfunction notice of a data processing device, the data processing device being connected to the monitoring device which monitors running condition through a network; a malfunction device identification unit configured to identify a data processing device that is malfunctioning based on the received malfunction notice; a data obtaining unit configured to obtain running data and device data of the data processing device that is malfunctioning and an another data processing device; and a malfunction cause identification unit configured to identify a cause of the malfunction, based on the obtained running data and the obtained device data.

Abstract: A control apparatus controls a first and a second power supply units having a redundant configuration and converters connected to respective outputs of the power supply units. The power supply units generate a plurality of voltages and supply a storage device with the generated voltages through the respective converters. The control apparatus includes a determination unit for determining whether an abnormality occurs in a first voltage that the first power supply unit generates, upon the second power supply unit failing, and an instruction unit for instructing the converter connected to the first power supply unit to generate the first voltage on the basis of a second voltage that the first power supply unit generates, upon the abnormality occurring in the first voltage of the first power supply unit.

Abstract: There is provided a relay apparatus configured to relay data transmitted and received between a plurality of devices, the relay apparatus includes an input unit configured to receive inputting of device group information, a first device and a second device being registered in the device group information, data transmission and reception between the first device and the second device being allowed, a setting unit configured to detect devices connected to respective communication ports of the relay apparatus and to register, in port group information, information associated with the communication ports respectively connected to the first device and the second device when the first device and the second device are connected to the relay apparatus, and a communication control unit configured to enable transmission and reception of data between the communication ports registered in the port group information.

Abstract: A monitoring device including: a receiving unit configured to receive a malfunction notice of a data processing device, the data processing device being connected to the monitoring device which monitors running condition through a network; a malfunction device identification unit configured to identify a data processing device that is malfunctioning based on the received malfunction notice; a data obtaining unit configured to obtain running data and device data of the data processing device that is malfunctioning and an another data processing device; and a malfunction cause identification unit configured to identify a cause of the malfunction, based on the obtained running data and the obtained device data.

Abstract: A control apparatus controls a first and a second power supply units having a redundant configuration and converters connected to respective outputs of the power supply units. The power supply units generate a plurality of voltages and supply a storage device with the generated voltages through the respective converters. The control apparatus includes a determination unit for determining whether an abnormality occurs in a first voltage that the first power supply unit generates, upon the second power supply unit failing, and an instruction unit for instructing the converter connected to the first power supply unit to generate the first voltage on the basis of a second voltage that the first power supply unit generates, upon the abnormality occurring in the first voltage of the first power supply unit.

Abstract: A failure predicting unit predicts a failure in a hard disk device that forms a disk array. A data transferring unit transfers data from a failure-predicted hard disk device for which the failure is predicted by the failure predicting unit to a spare disk. A data deleting unit deletes the data from the failure-predicted hard disk device after the data transferring unit completes transferring the data.

Abstract: A failure predicting unit predicts a failure in a hard disk device that forms a disk array. A data transferring unit transfers data from a failure-predicted hard disk device for which the failure is predicted by the failure predicting unit to a spare disk. A data deleting unit deletes the data from the failure-predicted hard disk device after the data transferring unit completes transferring the data.

Abstract: There are provided a disk connection unit, a disk package, a disk apparatus and a disk connection method that can improve the speed of operation and the reliability of the RAID categories. A disk connection unit 31 to be used to utilize a plurality of disks 32 by means of a single disk interface 21 comprises disk connectors dedicated to the respective disks 32 in order to connect the respective disks, a RAID control section that performs RAID control operations on the plurality of disks 32 by way of the disk connectors and a disk interface connector that connects the RAID control section to the disk interface 21.

Abstract: A library apparatus includes an accessor robot and a flat cable connected to the accessor robot. The flat cable has an outer check line and an inner check line each formed of a conductor. Breaks in each of the outer check line and the inner check line are detected to identify wear on the flat cable, and prevent sudden failure of the library apparatus.