Code:
# sysctl hw.disknames
hw.disknames=sd0:66190c80ca601670,cd0:,sd1:
#
It's sd1.
Code:
# mount /dev/sd1 /mnt/pen
mount_ffs: /dev/sd1 on /mnt/pen: No such file or directory
# mount /dev/sd1 /mnt/
mount_ffs: /dev/sd1 on /mnt: No such file or directory