You can manage ZFS file systems with legacy tools by setting the mountpoint property to legacy. Legacy file systems must be managed through the mount and umount commands and the /etc/vfstab file. ZFS does not automatically mount legacy file systems on boot, and the ZFS mount and umount commands do not operate on datasets of this type. The following examples show how to set up and manage a ZFS dataset in legacy mode:
# zfs set mountpoint=legacy tank/home/eschrock # mount -F zfs tank/home/eschrock /mnt |
To automatically mount a legacy file system on boot, you must add an entry to the /etc/vfstab file. The following example shows what the entry in the /etc/vfstab file might look like:
#device device mount FS fsck mount mount #to mount to fsck point type pass at boot options # tank/home/eschrock - /mnt zfs - yes - |
Note that the device to fsck and fsck pass entries are set to -. This syntax is because the fsck command is not applicable to ZFS file systems. For more information regarding data integrity and the lack of need for fsck in ZFS, see Transactional Semantics.