The main read/write fileset, root.dfs, is required in every cell's file system. It is the first fileset created in a cell during DFS configuration. It is the implied fileset for the root of a cell's DFS filespace (/.../cellname/fs, by default). It can be a DCE LFS fileset or it can be a non-LFS fileset. However, it must be a DCE LFS fileset if functionality such as replication is to be available in the cell.
To create root.dfs as a DCE LFS fileset, issue the fts create command to create the fileset on a specified server machine and exported DCE LFS aggregate. For example:
$ fts create root.dfs -server machine -aggregate name
Once the root fileset is created, start the dfsd process if it is not already running. The dfsd process automatically mounts the root of the global namespace (/...). Once the global namespace is mounted, the root.dfs fileset automatically resides at the top level of the cell's DFS filespace.
You must enter the fts crmount command with the -rw option to create an explicit read/write mount point for the fileset below the top level of the cell's DFS filespace. For example:
$ fts crmount /:/.rw root.dfs -rw
Once these steps are complete, you can replicate root.dfs. Replication is then available for DCE LFS filesets created in the cell. It is important that you follow these instructions if you plan to replicate filesets in your cell. Due to the nature of mount points, if you replicate root.dfs before creating its read/write mount point, you effectively make it impossible to access the read/write version of root.dfs.
(See Making Filesets and Aggregates Available for more information about creating and mounting filesets, using mount points, and creating and exporting aggregates.)
Note: By default, the junction to the DFS filespace is defined at /.../cellname/fs. However, the name of the junction is not considered to be well known and can be changed during installation and configuration of DCE. (See your vendor's installation and configuration documentation for more information.) The examples in this part of the guide use the default, fs, as the junction of the DFS filespace.