I’ve found that FreeBSD had dropped block device support. I totally agree with the idea about the risk of block device’s caching mechanism on disaster recovery (write reordering may suffer recovery tools such as fsck).
Anyway, on my FreeBSD box,
% ls /dev/ad0* crw-r----- 1 root operator 0, 82 Dec 15 20:12 /dev/ad0 crw-r----- 1 root operator 0, 83 Dec 15 20:12 /dev/ad0s1 crw-r----- 1 root operator 0, 85 Dec 16 05:12 /dev/ad0s1a crw-r----- 1 root operator 0, 86 Dec 16 05:12 /dev/ad0s1b crw-r----- 1 root operator 0, 87 Dec 15 20:12 /dev/ad0s1c crw-r----- 1 root operator 0, 88 Dec 16 05:12 /dev/ad0s1d crw-r----- 1 root operator 0, 89 Dec 16 05:12 /dev/ad0s1e crw-r----- 1 root operator 0, 90 Dec 16 05:12 /dev/ad0s1f crw-r----- 1 root operator 0, 91 Dec 16 05:12 /dev/ad0s1g
Oh… I didn’t know.