Using sudo for fio prefilling

PiperOrigin-RevId: 823133812

Author: Arushi-07

perfkitbenchmarker/linux_benchmarks/fio/utils.py

@@ -185,16 +185,14 @@ def FillDevice(vm, disk, fill_size, exec_path, use_directory=False):
     dir_or_filename_arg = 'directory'
   else:
     dir_or_filename_arg = 'filename'
-
   command = (
-      f'{exec_path} --{dir_or_filename_arg}={disk.GetDevicePath()} '
+      f'sudo {exec_path} --{dir_or_filename_arg}={disk.GetDevicePath()} '
       f'--ioengine={fio_flags.FIO_IOENGINE.value} --name={_FILENAME_PREFIX} '
       f'--blocksize={fio_flags.FIO_FILL_BLOCK_SIZE.value} --iodepth=64 '
       f'--rw=write --direct=1 --size={fill_size} '
       f'--nrfiles={fio_flags.FIO_NR_FILES.value} --fallocate=none '
       '--create_on_open=1'
   )
-
   vm.RobustRemoteCommand(command)