Abstract: A controller that obtains data from an object device in obedience to an obtaining request from the processor includes an error setter that sets, when a pseudo failure mode that spuriously generates a failure is active, an error associated with a failure type of a pseudo failure to be generated in the data obtained from the object device in obedience to the obtaining request; and an error processor that notifies, when detecting an error in the data under a state where the pseudo failure mode is active, the processor of the failure response corresponding to the failure type associated with the detected error.

Abstract: A compressing unit generates a plurality of types of compressed blocks for each of divided blocks of data, by using a plurality of algorithm executing units. A comparing unit stores, in a storage unit, comparison result information on a compressed block having the smallest size. A writing start determining unit makes a decision to start writing of a write block and compression of a next block, when a quotient obtained by dividing the size of the compressed block that is indicated in the comparison result information by a writing speed is determined to be less than or equal to an elapsed time. A writing unit selects, as a write block, a compressed block having the smallest size among the generated compressed blocks at the time the start decision is made by the writing start determining unit, and writes the selected write block to a block storage unit.

Abstract: A message analyzing apparatus includes a pickup unit that extracts an error message group from a message file obtained from an input device, a grouping unit that groups the error message group according to physical path, a narrowing down unit that narrows down the error message group, an error-location detecting/identifying unit that selects an error-location identifying message, a suspect-component identifying unit that selects a suspect-component identifying message, a group integrating unit that integrates plural groups, an operational-state identifying unit that selects an operational-state identifying message, and an output unit that generates and outputs the message analysis results to a display device.

Abstract: A message analyzing apparatus includes a pickup unit that extracts an error message group from a message file obtained from an input device, a grouping unit that groups the error message group according to physical path, a narrowing down unit that narrows down the error message group, an error-location detecting/identifying unit that selects an error-location identifying message, a suspect-component identifying unit that selects a suspect-component identifying message, a group integrating unit that integrates plural groups, an operational-state identifying unit that selects an operational-state identifying message, and an output unit that generates and outputs the message analysis results to a display device.