LOCAL FILE SERVER OPERATIVE TO TRANSFER FILE TO REMOTE FILE SERVER VIA COMMUNICATION NETWORK, AND STORAGE SYSTEM INCLUDING THOSE FILE SERVERS

摘要

A kind of remote file server management remote storage device and local file server management local storage are coupled to communication network (such as internet). The local file server (one) replicates the local storage of file to remote file server, and (two) if meeting first condition, management duplication file carries out file, wherein the data are replicated to migration file destination. The local file server, even if (Type B) is completed, delete target file migration is not from local storage, and if when second condition is satisfied, and delete target file migration is from local storage.