When a vFiler unit is migrated, all volumes associated with that vFiler unit are moved. vFiler unit migration in an HA pair cannot migrate a subset of the volumes that are managed by the vFiler unit it is migrating.
When you create vFiler units, keep in mind the following points:
Although you can rename a volume at the destination, it is best not to do so. This is because if you have NFS clients, renaming of the volume is not transparent to the NFS clients. When the storage system uses NFS to export a file system, the volume name is part of the exported path name. NFS clients try to mount by using the old path name. Therefore, to access the data after the vFiler unit has been migrated, clients must remount by using the new path name.