dos 下的DISK 的MBR 和DBR 的讀寫操作以及對MBR 和DBR 的修復程序，且可以把任何一個扇區（8G 內）SAVE TO FILE -DISK under dos of MBR and DBR operation of reading and writing as well as the MBR and DBR repair procedures, and can any one sector (8G inside) SAVE TO FILE