File server, file server log management system and file server log management method

摘要

The present invention provides a log management system which is devised so that improper behavior by managers with regard to the log information can easily be discovered. Virtual OS (133) are respectively installed for respective users in a file server (100) that can also be constructed as an NAS device. These virtual OS function as virtual NAS. The virtual OS and manager OS (132) can exchange information relating to log information via an information exchange part constructed as a kernel (131). The log information (D1) produced in the virtual OS is transmitted to a first log management device (400) via a first communications network (CN11), and is also transmitted to a second log management device (600) via a second communications network (CN12). The respective networks are separated. As a result of the same log information being managed by multiplex management using separate management devices, it can be detected whether or not there has been any improper behavior with respect to the log information.