Writing program for Destructive Data Wiper:
Destructive data wiping programs are those which write directly on the surface of the disk. This type of data wiping programs work on lower level than file system and operating system, which means that all the data and other logical information including OS, File systems, Directory entry and everything written on the disk is wiped out.
These data wiping programs directly wipe the sectors of the surface of the disk, and wipe out everything written on it. As all the data of the disk including operating system is lost, these programs as called destructive data wiping programs.
These types of wiping programs are preferred in such cases, where user is willing to overwrite everything on the disk, including Operating system and all the data on the disk.
However there are some more benefits of this type of data wiping programs. As these destructive data wiping programs work completely free from OS and File system and write directly on the surface of the disk, they are reasonably faster than the non-destructive data wipers.
Also, if any how logical bad sectors on the disk are created due to illegal storage of some random data, these logical bad sectors are also wiped out completely with the data of the disk.
The coding for a destructive data wiping program has been given next. The program has been written to support large size disks too. The program wipes the data of second physical hard disk connected to the computer.
///// Coding for a destructive data wiping program \\\\\
#include<stdio.h>
#include<dos.h>
/* Structure to be used by getdrivegeometry function
using INT 13H Extension, Function Number 0x48. */
struct geometry
{
unsigned int size ; /* (call) size of Buffer */
unsigned int flags ; /* Information Flags */
unsigned long cyl ; /* Number of Physical Cylinders on
Drive */
unsigned long heads ;/* Number of Physical Heads on
Drive */
unsigned long spt ; /* Number of Physical Sectors Per
Track */
unsigned long sectors[2] ; /* Total Number of
Sectors on Drive */
unsigned int bps ; /* Bytes Per Sector */
} ;
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