Seems that cifs and nfs support is missing from the tablet kernel.
# modinfo cifs modinfo: ERROR: Module cifs not found. # modinfo nfs filename: /lib/modules/3.10.20/nfs.ko license: GPL author: Olaf Kirch <okir@monad.swb.de> alias: nfs4 alias: fs-nfs4 alias: fs-nfs depends: sunrpc,lockd intree: Y vermagic: 3.10.20 SMP preempt mod_unload signer: Magrathea: Glacier signing key sig_key: 87:EE:C8:63:09:B5:C9:76:5D:5B:AA:B2:3A:72:B8:80:C0:59:11:6D sig_hashalgo: sha256 parm: cache_getent:Path to the client cache upcall program (string) parm: cache_getent_timeout:Timeout (in seconds) after which the cache upcall is assumed to have failed (ulong) parm: callback_tcpport:portnr parm: nfs_idmap_cache_timeout:int parm: nfs4_disable_idmapping:Turn off NFSv4 idmapping when using 'sec=sys' (bool) parm: max_session_slots:Maximum number of outstanding NFSv4.1 requests the client will negotiate (ushort) parm: send_implementation_id:Send implementation ID with NFSv4.1 exchange_id (ushort) parm: nfs4_unique_id:nfs_client_id4 uniquifier string (string) parm: enable_ino64:bool