Debugging will erase all partitions and all data in a physical hard drive.

C:\> debug

-F 200 L1000 0 <Enter>

-A CS:100 <Enter>

XXXX:0100   MOV AX,301 <Enter>

XXXX:0103   MOV BX,200 <Enter>

XXXX:0106   MOV CX,1 <Enter>

XXXX:0109   MOV DX,80 <Enter>                  “80 FOR HDD 0, 81 FOR HDD 1”

XXXX:010C  INT 13 <Enter>

XXXX:010E  INT 20 <Enter>

XXXX:0110   <Enter>

-G <Enter>

Program Terminated Normally

<Ctrl+Alt+Del> to restart computer

After Debugging make partitions on HDD as required using FDISK or (DISKPART – FOR WIN XP/2000)