Patent ID: 7159142

Claim:
A pseudo I/O device for use in a pseudo I/O system that is connected with a device to be tested, and simulates an actual I/O system, comprising: a setting unit receiving a file where contents of an error of a pseudo target are defined and set and setting the file as a setting file, the contents of the file being used to process commands from various types of devices including devices of a different type than the device to be tested; a receiving unit receiving a command from the device to be tested; a pseudo I/O unit processing the command received by said receiving unit according to set contents when the contents corresponding to the command are set when referencing the setting file, and performing a normal reply process when the contents corresponding to the command are not set; and a transmitting unit returning data after being processed to the device to be tested at a request source, where only one pseudo I/O unit is provided in the pseudo I/O system.