<https://docs.freebsd.org/en/books/handbook/bsdinstall/#bsdinstall-part-zfs> <https://docs.freebsd.org/en/books/handbook/bsdinstall/#bsdinstall-zfs-vdev_type> the selection is 'stripe'. In the next image <https://docs.freebsd.org/en/books/handbook/bsdinstall/#bsdinstall-zfs-disk_select>, the reader might reasonably assume that the two selected disks are to be striped. In the next image <https://docs.freebsd.org/en/books/handbook/bsdinstall/#bsdinstall-zfs-vdev_invalid>, suddenly it's not striping. Also, there's no white space above the image, as if it's Figure 22. It's not, it's Figure 23. This subsection might be improved by better titling of figures. Maybe precede one set of figures with explanatory text.
Created attachment 242427 [details] Screenshot: ZFS configuration: two disks available Maybe add a subsection for striping (the default) using only one disk. (In this case, striping is a misnomer, but we can't do better without a change to the installer.) Something like the attached screenshot could show that if multiple disks are available (maybe one internal, one external) no more than one should be selected.