Traceback (most recent call last):
  File "/tmp/nest-ljcb4_bi.3e5aa4faf85bd3b57f990d86ca257e70e5123b0dd09f39deff10d4c3ee875380/removable_storage_test", line 594, in <module>
    sys.exit(main())
  File "/tmp/nest-ljcb4_bi.3e5aa4faf85bd3b57f990d86ca257e70e5123b0dd09f39deff10d4c3ee875380/removable_storage_test", line 507, in main
    target_file):
  File "/tmp/nest-ljcb4_bi.3e5aa4faf85bd3b57f990d86ca257e70e5123b0dd09f39deff10d4c3ee875380/removable_storage_test", line 132, in write_file
    os.fsync(outfile.fileno())
OSError: [Errno 5] Input/output error