Patent ID: 7047261

Claim:
A file level copy method in one or more storage systems connected to a computer via a network, comprising the steps of: at a first storage system, receiving a write request from said computer to write a file; writing said file in response to said write request; in response to said write request and subsequent to writing said file, referring to a copy file table stored in said first storage system, said copy file table comprising plural source object entries, each source object entry including a source object identification and copy destination information associated with said source object identification, said copy destination information including identification of a target storage system and identification of a target directory in said target storage system; and if source object identification of one of said source object entries identifies said file or identifies a directory that contains said file, then copying said file to a target storage system associated with said source object identification, wherein the foregoing actions are performed for each write request, wherein if said file is copied to said target source, then sending a report to said computer indicative of completion of said write request, said report being sent after completion of said copying.