OPT_UINT('e', "error-skip", error_skip, OPT_REQUIRED_VALUE, "<bytes>\tHow far to skip on error (default=block size)"),
OPT_U64(0, "start", start_pos, OPT_REQUIRED_VALUE, "<bytes>\tStart position (default=beginning of device)"),
OPT_U64(0, "end", end_pos, OPT_REQUIRED_VALUE, "<bytes>\tEnd position (default=end of device)"),
OPT_UINT('e', "error-skip", error_skip, OPT_REQUIRED_VALUE, "<bytes>\tHow far to skip on error (default=block size)"),
OPT_U64(0, "start", start_pos, OPT_REQUIRED_VALUE, "<bytes>\tStart position (default=beginning of device)"),
OPT_U64(0, "end", end_pos, OPT_REQUIRED_VALUE, "<bytes>\tEnd position (default=end of device)"),