910 	boot_sector bs;  in do_fat_write()  local
921 	if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) {  in do_fat_write()
926 	total_sector = bs.total_sect;  in do_fat_write()
931 		mydata->fatlength = bs.fat32_length;  in do_fat_write()
933 		mydata->fatlength = bs.fat_length;  in do_fat_write()
935 	mydata->fat_sect = bs.reserved;  in do_fat_write()
938 		= mydata->fat_sect + mydata->fatlength * bs.fats;  in do_fat_write()
939 	num_of_fats = bs.fats;  in do_fat_write()
941 	mydata->sect_size = (bs.sector_size[1] << 8) + bs.sector_size[0];  in do_fat_write()
942 	mydata->clust_size = bs.cluster_size;  in do_fat_write()
950 		rootdir_size = ((bs.dir_entries[1]  * (int)256 +  in do_fat_write()
951 				 bs.dir_entries[0]) *  in do_fat_write()