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PowerFlex File Controllers, also known as File Nodes, are physical nodes that enable PowerFlex software defined File Services. They host the NAS Servers, which in turn host the tenant namespaces and file systems, mapping PowerFlex volumes to the file systems presented by the NAS Servers. All major protocols are supported, such as NFS, SMB/CIFS, FTP, and NDMP. PowerFlex file service is supported from PowerFlex 4.0.