1. A method for operating a server, comprising: assigning a plurality of storage volumes to one or more storage devices; having a plurality of sub-volumes within a namespace of each of the plurality of storage volumes; creating an instance of a virtual server, the virtual server having a plurality of assigned sub-volumes, the assigned sub-volumes chosen from different storage volumes of the plurality of storage volumes; and sharing a file system function between the server and the instance of the virtual server, the file system function using at least one of the plurality of assigned sub-volumes.