WARNING: WITNESS option enabled, expect reduced performance.
WARNING: Running on a broken hypervisor that does not support mandatory H_CLEAR_MOD and H_CLEAR_REF hypercalls. Performance will be suboptimal.
arc4random: no preloaded entropy cache
Root mount waiting for: usbus0
uhub0: 3 ports with 3 removable, self powered

Loader variables:

Manual root filesystem specification:
  <fstype>:<device> [options]
      Mount <device> using filesystem <fstype>
      and with the specified (optional) option list.

    eg. ufs:/dev/da0s1a
        zfs:tank
        cd9660:/dev/cd0 ro
          (which is equivalent to: mount -t cd9660 -o ro /dev/cd0 /)

  ?               List valid disk boot devices
  .               Yield 1 second (for background tasks)
  <empty line>    Abort manual input

mountroot> ufs:/dev/da0