> ZFS required a lot of regular maintenance, care and feeding.

According to FreeBSD's handbook[0], you only need to scrub the drives once a month, and check `zpool status` regularly.

[0] https://www.freebsd.org/doc/handbook/zfs-zpool.html

My crontab:

  # scrub
  0       1       1,15    *       *       zpool scrub zroot
  0       8       5,20    *       *       send_admin_email "zpool status" "$(zpool status)"