<mountroot>

[tethys ocean]

 Hi all,
 
 My disk file system was crash sice while booting
 
 Mounting root from ufs:/dev/ad0s1a
 Root mount failed:6
 
Manual root filesystem specification:
  <fstype>:<device>  Mount <device> using filesystem <fstype>
                       eg. ufs:/dev/da0s1a
  ?                  List valid disk boot devices
  <empty line>       Abort manual input

mountroot>
 
 How I can mount?