def _LocateFioJson(vm, outdir, test):
  """Locate raw fio output.

  Args:
    vm: VirtualMachine object.
    outdir: string. Output directory.
    test: string. Test name.

  Returns:
    A list of strings representing fio output filename.
  """
  fns, _ = vm.RemoteCommand('ls %s/fio-%s*.json' % (outdir, test))
  return fns.split()