Disable hfs journaling by flipping bits on raw disk (bad idea, but sometimes nesesary when disk is on a poor state and you just want to do the thing)

manually-disable-hfs-jounal-flag.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <byteswap.h>

int main(int argc, char * argv[]) {
  int fd = open(argv[1], O_RDWR);
  if (fd < 0) {
    perror("open");
    return -1;
  }

  unsigned char * buffer = (unsigned char * ) mmap(NULL, 2048, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
  if (buffer == (unsigned char * ) 0xffffffff) {
    perror("mmap");
    return -1;
  }

  if ((buffer[1024] != 'H') && (buffer[1025] != '+')) {
    fprintf(stderr, "%s: HFS+ signature not found -- aborting.\n", argv[0]);
    return -1;
  }

  unsigned long attributes = * (unsigned long * )( & buffer[1028]);
  attributes = bswap_32(attributes);
  printf("attributes = 0x%8.8x\n", attributes);

  if (!(attributes & 0x00002000)) {
    printf("kHFSVolumeJournaledBit not currently set in the volume attributes field.\n");
  }

  attributes &= 0xffffdfff;
  attributes = bswap_32(attributes);
  *(unsigned long * )( & buffer[1028]) = attributes;

  buffer[1032] = '1';
  buffer[1033] = '0';
  buffer[1034] = '.';
  buffer[1035] = '0';

  buffer[1036] = 0;
  buffer[1037] = 0;
  buffer[1038] = 0;
  buffer[1039] = 0;

  printf("journal has been disabled.\n");
  return 0;
}

This hack from this pastebin post I found on this old forum tread

Linux headers are required for this one
gcc ./manually-disable-hfs-jounal-flag.c -o manually-disable-hfs-jounal-flag -Wno-format
usage is simple, just execute the binary pointing to the partition you want the journal disabled from
./manually-disable-hfs-jounal-flag /dev/partition