随机复写硬盘，可以防止一般的数据恢复？？？

随机复写硬盘，可以防止一般的数据恢复？？？

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

#define FILE_SIZE        ( 1024 * 1024 * 1 )
#define FILE_COUNT        ( 1 * 100 )
#define FCK_LOOP        ( 3 )

int main(void)
{
    FILE *fp = NULL;
    char file_name[32];
    unsigned char *data = NULL;
    int i, j, len, fck_loop;
    
    data = (unsigned char *)malloc(FILE_SIZE);
    if(data == NULL)
    {
        printf("malloc %d error!!
", i);
        goto end;
    }
    
    fck_loop = 0;
    while(fck_loop < FCK_LOOP)
    {
        //for(i = 0; i < FILE_COUNT; i++)
        i = 0;
        while(1)
        {
            if(fck_loop == 0)
            {
                memset(data, 0x00, FILE_SIZE);
            }
            else if(fck_loop == 1)
            {
                memset(data, 0xff, FILE_SIZE);
            }
            else
            {
                srand(i ^ 0x835);
                
                for(j = 0; j < FILE_SIZE; j++)
                {
                    data[j] = rand() % 0xff;    
                }
            }

            
            snprintf(file_name, sizeof(file_name)-1, "fck_file_%08d", i);
            printf("%s
", file_name);
            
            fp = fopen(file_name, "w+");
            if(fp == NULL)
            {
                printf("create %s error!!
", file_name);
                //goto end;
                break;
            }
            
            len = fwrite(data, 1, FILE_SIZE, fp);
            //printf("fwrite len: %d
", len);
            if(len != FILE_SIZE * 1)
            {
                printf("write %s error!!
", file_name);
                //goto end;
                break;
            }
            
            fclose(fp);
            i++;
        }
        system("del fck_file_*");
        fck_loop++;
    }
    free(data);
    
end:    
    return 0;
}