https://savagedlight.me/2012/07/15/freebsd-zfs-advanced-format/

https://calomel.org/zfs_health_check_script.html

https://superuser.com/questions/608612/4k-hard-drives-freebsd-gpart-and-zfs

Create a ZFS pool on FreeBSD 10.0-RELEASE with Advanced Format (4K sector) drives

zfs-periodic

Оптимизация FreeBSD под высокие нагрузки

pfctl cheat sheet

https://serverfault.com/questions/58766/creating-pflog-interface