NFS Services Administrator's Guide (B.11.31.04) March 2009

NOTE: Use the bdf command to determine whether your filesystems are on
different disks or logical volumes. Each entry in the bdf output represents a
separate disk or volume that requires its own entry in the /etc/dfs/dfstab
file, if shared. For more information on the bdf command, see bdf(1M).
• When you share a directory, the share options that restrict access to a shared
directory are applied, in addition to the regular HP-UX permissions on that
directory.
For example, if only the owner of a file has write permission, others cannot write
to the file even if it is shared with read and write permissions.
• You can also specify the access permissions on the NFS client, when a directory is
mounted. If these permissions differ from the permissions for the shared directory
on the NFS server, the more restrictive permissions are used.
For example, consider an NFS client that mounts a directory with read and write
permissions while the directory is shared by the NFS server with read permission.
Read permissions being more restrictive, the NFS client only has read permission.
• Exercise caution when sharing a directory that contains a symbolic link, which
refers to data outside the NFS mounted directory.
Once the directory is mounted on an NFS client, the symbolic link is resolved
locally on the client.
Figure 2-1 depicts symbolic links in NFS mounts. The destination of the symbolic link
exists on the NFS server, but does not exist on the NFS client. This results in an error
message.
Figure 2-1 Symbolic Links in NFS Mounts
32 Configuring and Administering NFS Services