struct type_htable
{
	int drv_number;
	int cyl_number;
	int head_number;
	int sec_number;
	int blk_size;
	int max_cyl;
	int max_head;
	int max_sec;
	int precomp;
	int skew;
	int alt_sector;
	int retry;
	int step;
	int ileave;
	int ecc_len;
	int ecc;
	int sec_size;
	float bits_read;

};

struct type_task_file
{
	int error;
	int secnt;
	int sector;
	int cyllo;
	int cylhi;
	int SDH;
	int status;
	int secstat;
	int DIR;
};

struct type_esfile
{
	int xfrlo;
	int xfrhi;
	int plo;
	int gap;
	int stat;
};

union type_scan
{
   int	c;
   char ch[2];
};


struct type_error
{
   int cyl;
   unsigned int  offset;
   unsigned char head;
   unsigned char sector;
};