Information of 512 Bytes to fill space of Bad Sector

/*Information of 512 Bytes to fill space of Bad Sector */

/// I used 512 zeros to fill the space of 512 bytes \\\

static char dbuf2[512] =
"00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000";

FILE *tt;
clrscr();
printf("\n Enter The Name of file with Path to store The Data Temporarily\n");
gets(filename);
if((tt=fopen(filename,"wb"))==NULL)
{
printf("Could Not Create The File, Press any Key To
EXIT");
getch();
exit(0);
}
printf("\n Initializing Floppy Disk System...\n");

/// Initialize the Disk System \\\

for(i=0; i<3; i++)
{
regs.h.ah = 0x00; /* Reset Disk System */
regs.h.dl = 0x00; /* Floppy Disk a: */

int86(0x13, &regs, &regs);
}

for(track=0;track<=79;track++)
{
for(head=0;head<=1;head++)
{
for(sector=1;sector<=18;sector++)
{
dinfo.drive = 0; /* drive number for A: */
dinfo.head = head; /* disk head number */
dinfo.track = track; /* track number */
dinfo.sector = sector; /* sector number */
dinfo.nsectors = 1; /* sector count */
dinfo.buffer = dbuf; /* data buffer */

result = _bios_disk(_DISK_READ, &dinfo);

if ((result & 0xff00) == 0)
{
for(i=0;i<512;i++)
fprintf(tt,"%c",dbuf[i] & 0xff);
}

else
{
printf("Cannot read drive A, status =
0x%02x\t%d\t%d\t%d\n", result, head, track, sector);

/* If Sector is not Readable, occupy 512 bytes by dbuf2 */

fwrite(dbuf2,512,1,tt);
}

printf("Reading Track= %d Head= %d Sector= %d\n",
track, head, sector);
}
}
}
}

Sample Chapters from book DATA RECOVERY WITH AND WITHOUT PROGRAMMING by Author Tarun Tyagi

Publishers of the Book Number of Pages ISBN Price of the Book BPB Publications, New Delhi, India 540 81-7656-922-4 $69.00 (Including Shipping Charges, Cost of Book and Other expenses, Free Source Code CD included with the Book)

page 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 page 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33