Tell me you don't want this sort of thing here and I won't do it again, but you lot have talked about my books before, so I figured it would be on-topic.
New FreeBSD book, "FreeBSD Mastery: Storage Essentials." All about GEOM, GBDE, UFS, FFS (the filesystem layer, not the other one), scripting installs, GPT and MBR and disklabels and all that low-level disk stuff you really should know.
Book page at:
https://www.michaelwlucas.com/nonfic...age-essentials
Thank you for your indulgence.