The guidelines in Setting Up User Filesets assume that the user does not have an existing home directory in the file system. A user who has data in an existing home directory in a non-LFS fileset mounted in the global namespace can continue to use that fileset. However, if you choose to create and mount a DCE LFS fileset for the user, you must be careful; DFS does not allow you to mount a fileset at an existing directory. You must move the user's data from the existing home directory in the DCE namespace to a temporary directory. You must then remove the existing home directory before creating and mounting the user's DCE LFS fileset. You can then move the user's data to the new fileset.
For example, suppose the user named terry in the previous example has an existing home directory in a non-LFS fileset mounted at /.../abc.com/fs/usr/terry. In this case, move the user's data from /.../abc.com/fs/usr/terry to a temporary location (such as a subdirectory of /tmp on the local disk), and remove the /.../abc.com/fs/usr/terry directory and its contents. Then create and mount the user's DCE LFS fileset as described in Setting Up User Filesets. Finally, move the user's data from the temporary location into the new DCE LFS fileset mounted at /.../abc.com/fs/usr/terry. When these steps are complete, the user can access the data as before.