#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

typedef struct {
	unsigned short	lv_num;
	unsigned short	le_num;
} pe_disk_t;

int main(int argc, char *argv[]) {
	pe_disk_t	pe;
	int		i,
			fd;

	if ((fd = open("/dev/md0", O_RDWR)) == -1) {
		perror("open");
		exit(1);
	}

	if ((lseek(fd, 123904, SEEK_SET)) == -1) {
		perror("lseek");
		exit(1);
	}

	pe.lv_num = 2;
	for (i=0; i < 174; i++) {
		printf("writing entry %d...\n", i);
		pe.le_num = i;
		write(fd, &pe, sizeof(pe));
	}

	close(fd);
	
	return 0;
}