hi, guys A question here. In former Heterogeneous network filesystem Environments , there must be a big problem, it is file locking. when I use Samba and NFS at the same time, NFS client might can't understand the oplocks of Samba, and Samba Client might can't know what NFS client has buffered of data for writing on the same file also. Many manufactures has developed their so called 'Unified File Locking',for example, Net APP's SecureShare, Veritas' SLFL, HP's Unified File Locking. But now, Linux 2.4 kernel immplement mandary lock, Samba released 2.2.5 version, NFS V4 changed a lot, I wanna know that under Linux 2.4.18, with Samba 2.2.5 and NFS 3, is that problem still there? If not, what kind of mechanism ensure the data integrity with cross-protocol? I am eager for your reply. Thanks Best Regards