Device Mapper version 4.16.0 loaded
dm_target_error: Successfully initialized
dm_target_zero: Successfully initialized
Mounting root from ufs:da8s2a
no disk named 'da8s2a'
setrootbyname failed
ffs_mountroot: can't find rootvp
Root mount failed: 6

Manual root filesystem specification:
<fstype>:<device> Specify root (e.g. ufs:da0s1a)
?				  List valid disk boot devices
panic			  Just panic
abort		      Abort manual input

mountroot>