Transmission monitoring and controlling apparatus and a transmission monitoring and controlling method
First Claim
1. A transmission monitoring and controlling apparatus for monitoring and controlling a network connecting a first system and a second system, the apparatus comprising:
- a first monitor for monitoring information, including data read commands and data write commands, transmitted from a first system to a second system through a network;
a second monitor for monitoring information, including device failure information, transmitted from the second system;
a controlling memory connected between the first and second systems in the network for maintaining a back-up copy of data stored in the second system;
a back controller for generating information to be sent to the first and second systems in response to information detected by the first and second monitors, the back controller comprising;
a processing controller for analyzing the information monitored by the first and second monitors, wherein, when the first system transmits a data read command to read data from a failed device in the second system, the processing controller retrieves a back-up copy from the controlling memory and transmits the back-up copy to the first system, thereby replacing the failed device; and
first and second switches for receiving the information generated by the back controller and information transmitted by the first and second systems, for switching to output to the first and second systems one of the information transmitted and the information generated.
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Accused Products
Abstract
A transmission monitoring and controlling apparatus is provided between a first system and a second system. The transmission monitoring and controlling apparatus monitors information transmitted through a Fibre Channel. Then, a back controller analyzes the monitored information and stores the information in a controlling memory based on the analysis. For example, when the first system writes data on the second system, the back controller stores the data in the controlling memory. Therefore, even if a failure has occurred in the second system, the transmission monitoring and controlling apparatus is able to read the data from the controlling memory and send the data to the first system instead of to the second system.
50 Citations
21 Claims
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1. A transmission monitoring and controlling apparatus for monitoring and controlling a network connecting a first system and a second system, the apparatus comprising:
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a first monitor for monitoring information, including data read commands and data write commands, transmitted from a first system to a second system through a network; a second monitor for monitoring information, including device failure information, transmitted from the second system; a controlling memory connected between the first and second systems in the network for maintaining a back-up copy of data stored in the second system; a back controller for generating information to be sent to the first and second systems in response to information detected by the first and second monitors, the back controller comprising; a processing controller for analyzing the information monitored by the first and second monitors, wherein, when the first system transmits a data read command to read data from a failed device in the second system, the processing controller retrieves a back-up copy from the controlling memory and transmits the back-up copy to the first system, thereby replacing the failed device; and first and second switches for receiving the information generated by the back controller and information transmitted by the first and second systems, for switching to output to the first and second systems one of the information transmitted and the information generated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 20)
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11. A transmission monitoring and controlling apparatus for monitoring and controlling a network connecting a first system and a second system, the apparatus comprising:
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a monitor for monitoring information transmitted in a network; a back controller for generating information sent to the network in response to information detected by the monitor; and a switch receiving the information generated by the back controller and information transmitted in the network, for switching to output to the network one of the information transmitted and the information generated, wherein; the back controller comprises a receiving controller for receiving the information transmitted in the network from the monitor, the transmission monitoring and controlling apparatus further comprises a controlling memory for storing the information received by the receiving controller, and the back controller comprises a processing controller for analyzing the information received by the receiving controller and generates information sent to one of the first system and the second system in response to information stored in the controlling memory and a transmitting controller for outputting information generated by the processing controller to the switch, the processing controller retrieves information stored in the controlling memory and generates information for operating one of the first system and the second system based on the information retrieved from the controlling memory, at least one of the first system and the second system comprises a data memory for storing information, the processing controller generates a command for storing in the data memory information retrieved from the controlling memory, and the processing controller checks vacancy of lines of the network in response to the information transmitted in the network and monitored by the monitor and when there is a vacancy, the processing controller generates the command, and the controlling memory stores information stored in the data memory as redundant data.
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15. A transmission monitoring and controlling method, wherein a network connecting a first system and a second system is monitored and controlled, the method comprising:
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monitoring information, including data read commands and data write commands, transmitted from a first system to a second system through a network; monitoring information, including device failure information, transmitted from the second system; storing data in the second system; maintaining a back-up copy of the data stored in the second system in a controlling memory connected to the first and second systems through the network; receiving the information monitored, generating information based on the information received, and sending to the network the information generated based on the received information, wherein, when a data read command to read data from a failed device in the second system is received from the first system, retrieving a back-up copy from the controlling memory and transmitting the back-up copy to the first system, thereby replacing the failed device; and switching so that one of the information generated based on the received information generated and the information transmitted on the network is outputted to the network. - View Dependent Claims (16, 17, 18, 19, 21)
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Specification