11.4. Mount existing partitions

11.4.1. Disklabel editor

                                  Message
OK.  First, we're going to go to the disklabel editor.  In this editor
you will be expected to Mount any partitions you're interested in
upgrading.  DO NOT set the Newfs flag to Y on anything in the label editor
unless you're absolutely sure you know what you're doing!  In this
instance, you'll be using the label editor as little more than a fancy
screen-oriented partition mounting tool.

Once you're done in the label editor, press Q to return here for the next
step.
                                   [ OK ]
                          [ Press enter or space ]

Using the arrow keys, select the first partition to be mounted, ad0s1a in this case, and press M. A pop-up screen will prompt you to enter the mount point.

After you have mounted all the partitions, the disklabel editor will appear similar to Figure 11-13. Your disk layout and values will probably be different.