mode_sense
ret = mode_sense(fd, byte2, 1, 254, buf);
int mode_sense(int fd, uchar_t pc, int dbd, int page_len, uchar_t *buffer);
if ((ret = mode_sense(fd, byte2, 1, 254, buf)) == 0) {
int mode_sense(int fd, uchar_t pc, int dbd, int page_len,
int mode_sense(int fd, uchar_t pc, int dbd, int page_len,
ret = mode_sense(fd, byte2, 1, 254, buf);