Patent ID: 7506375

Claim:
A file server in which a first operating system and a second operating system are respectively operated, comprising: an inter-operating-system communications part which exchanges only specified instructions including log information between said first operating system and said second operating system and responses to the instructions accordingly, the instructions being registered in a preset instruction table; a log information producing part which produces said log information which relates to changes in settings in the first operating system; a first log transmitting part which transmits the log information thus produced from said first operating system to a first log management device via a first communications network that is connected to said first operating system; and a second log transmitting part which transmits said produced log information from said first operating system to said second operating system via said inter-operating-system communications part, and which transmits said information from said second operating system to a second log management device via a second communications network which is separated from said first communications network, and which is connected to the second operating system.