I take it it doesn't work with your WS2016 either? Could you open a new bug report on bugzilla.samba.org in the cifsVFS/kernel fs section? A network trace along with system log files with debugging enabled would help a lot. echo 'module cifs +p' > /sys/kernel/debug/dynamic_debug/control echo 'file fs/cifs/* +p' > /sys/kernel/debug/dynamic_debug/control echo 1 > /proc/fs/cifs/cifsFYI echo 1 > /sys/module/dns_resolver/parameters/debug dmesg --clear tcpdump -w ws2016.pcap & pid=$! sleep 3 mount.cifs .... sleep 3 kill $pid dmesg > ws2016.log this should generate a network capture in file ws2016.pcap and kernel log messages in ws2016.log. Update the mount command with your setup. Do it once against your WS2016 system, and once against your WS2008 system. -- Aurélien Aptel / SUSE Labs Samba Team GPG: 1839 CB5F 9F5B FB9B AA97 8C99 03C8 A49B 521B D5D3 SUSE Linux GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html